Rhododendron subg. Hymenanthes

Rhododendron subg. Hymenanthes
Rhododendron ponticum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Ericales
Family: Ericaceae
Genus: Rhododendron
Subgenus: Rhododendron subg. Hymenanthes
(Blume) K.Koch
Sections
  • Ponticum
  • Pentanthera

Rhododendron subg. Hymenanthes is a subgenus of the genus Rhododendron, with a widespread distribution in the temperate Northern Hemisphere. The species are evergreen shrubs and small to medium-sized trees (up to 20 m tall), with medium-sized to large leaves (very large, over 40 cm long, in a few species). The flowers are large, produced in terminal trusses of 5-40 together.[1]

The subgenus includes two sections, Rhododendron sect. Ponticum, divided into 24 subsections and about 140 species, and (since 2005) Rhododendron sect. Pentanthera.[2]

Cultivation

This subgenus includes the majority of the larger evergreen rhododendrons widely grown as ornamental plants. Some species, notably Rhododendron ponticum, have escaped from cultivation and become invasive in some regions such as New Zealand.

Ponticum

Section Ponticum (24 subsections) includes:

  • R. subsect. Arborea (4 species)
  • R. subsect. Argyrophylla (23 species)
  • R. subsect. Barbata (2 species)
  • R. subsect. Campanulata (2 species)
  • R. subsect. Campylocarpa (4 species)
  • R. subsect. Falconera (7 species)
  • R. subsect. Fortunea (39 species)
  • R. subsect. Fulgensia (2 species)
  • R. subsect. Fulva (2 species)
  • R. subsect. Glischra (5 species)
  • R. subsect. Grandia (9 species)
  • R. subsect. Griersoniana (one species, R. griersonianum)
  • R. subsect. Irrorata (7 species)
  • R. subsect. Lanata (6 species)
  • R. subsect. Maculifera (6 species)
  • R. subsect. Neriiflora (19 species)
  • R. subsect. Parishia (3 species)
  • R. subsect. Pontica (13 species)
  • R. subsect. Selensia (5 species)
  • R. subsect. Taliensia (20 species)
  • R. subsect. Thomsonia (7 species)
  • R. subsect. Venatora (one species, R. venator)
  • R. subsect. Williamsiana (one species, R. williamsianum)

Arborea

Rhododendron subsect. Arborea is a subsection of section Ponticum in Hymenanthes consisting of 4 species of trees native to East Asia.[3][4]

Image Name Distribution
Rhododendron arboreum Smith 1805 China (Guizhou, S Xizang), Bhutan, India, Kashmir, Nepal, Sikkim, Sri Lanka, Thailand, Vietnam
Rhododendron delavayi Franchet 1886 China (Guangxi, Guizhou, Sichuan, Xizang, Yunnan), Bhutan, India, Myanmar, Thailand, Vietnam
Rhododendron lanigerum Tagg 1930 China (Xizang), India
Rhododendron niveum J. D. Hooker 1852 China (Xizang), Bhutan, India (Sikkim)

Argyrophylla

Rhododendron subsect. Argyrophylla is a subsection of section Ponticum in Hymenanthes consisting of 23 species of shrubss native to East Asia. This section is distinguished by its silvery white, pale yellow or yellowish-brown hairs on the abaxial leaf surface.[5][6]

Image Name Distribution
Rhododendron adenopodum Franch. 1895 China ( Chongqing, Hubei)
Rhododendron argyrophyllum Franch. 1886 China (Guizhou, Sichuan, Yunnan)
Rhododendron brevipetiolatum M.Y.Fang 1984 China (Sichuan)
Rhododendron coryanum Tagg & Forrest 1926 China ( Xizang, Yunnan)
Rhododendron denudatum H.Lév. 1914 China (Guizhou, Sichuan, Yunnan)
Rhododendron ebianense M.Y.Fang China (Sichuan )
Rhododendron eriobotryoides Xiang Chen & Jia Y.Huang 2010 China (Guizhou)
Rhododendron fangchengense P.C.Tam 1982 China (Guizhou)
Rhododendron farinosum H.Lév. China (Yunnan)
Rhododendron floribundum Franch. 1886 China (Guizhou, Sichuan, Yunnan.)
Rhododendron formosanum Hemsl. 1895 Taiwan
Rhododendron haofui Chun & W.P.Fang 1957 China (Guangxi, Guizhou, Hunan, Jiangxi, Yunnan)
Rhododendron hunnewellianum Rehder & E.H.Wilson 1913 China (Gansu, Sichuan)
Rhododendron hypoglaucum Hemsl. 1889 China (Chongqing, Hubei, Shaanxi, Sichuan.)
Rhododendron insigne Hemsl. & E.H.Wilson 1910 China (Sichuan.)
Rhododendron longipes Rehder & E.H.Wilson 1913 China (Chongqing, Guizhou, Sichuan, Yunnan.)
Rhododendron oblancifolium M.Y.Fang 1988 China (Guizhou)
Rhododendron pingianum W.P.Fang 1939 China (Sichuan)
Rhododendron pudiense Xiang Chen & Jia Y.Huang 2010 China (Guizhou)
Rhododendron ririei Hemsl. & E.H.Wilson 1910 China (Sichuan)
Rhododendron shimenense Q.X.Liu & C.M.Zhang 1991 China (Hunan)
Rhododendron simiarum Hance 1881 China (Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Jiangxi, Zhejiang)
Rhododendron thayerianum Rehder & E.H.Wilson 1913 China (Sichuan)

Barbata

Rhododendron subsect. Barbata is a subsection of section Ponticum in Hymenanthes consisting of 5 species of small trees native to East Asia.[7]

Image Name Distribution
Rhododendron argipeplum Balf.f. & R.E.Cooper 1916 China (Xizang), Bhutan, India (Sikkim)
Rhododendron barbatum Wall. ex G.Don 1834 China (Xizang), Bhutan, India (Sikkim), Nepal
Rhododendron erosum Cowan 1937 China (Xizang), Arunachal Pradesh
Rhododendron exasperatum Tagg 1930 China (Xizang), India, Myanmar
Rhododendron succothii Davidian 1965 Bhutan, India (W Arunachal Pradesh)

Campanulata

Rhododendron subsect. Campanulata is a subsection of section Ponticum in Hymenanthes consisting of 2 species of shrubs native to East Asia.[8]

Image Name Distribution
Rhododendron campanulatum D. Don 1821 China (Xizang), Bhutan, India (Kashmir, Sikkim, Himachal Pradesh), Nepal
Rhododendron gannanense Z. C. Feng & X. G. Sun 1992 China (Gansu)

Campylocarpa

Rhododendron subsect. Campylocarpa is a subsection of section Ponticum in Hymenanthes consisting of 6 species of shrubs with campanulate shaped flowers native to East Asia.[9]

Image Name Distribution
Rhododendron callimorphum Balf.f. & W.W.Sm. 1917 China (Yunnan), Myanmar
Rhododendron campylocarpum Hook.f. 1851 China (Xizang, Yunnan) Bhutan, India (Sikkim), Myanmar, Nepal,
Rhododendron henanense W.P.Fang 1983 China (Henan)
Rhododendron longicalyx M.Y.Fang 1988 China (Sichuan)
Rhododendron souliei Franch. 1895 China (Sichuan, Xizang)
Rhododendron wardii W.W.Sm. 1914 China (Sichuan, Xizang, Yunnan)

Falconera

Rhododendron subsect. Falconera is a subsection of section Ponticum in Hymenanthes consisting of 14 species of shrubs and trees with thick leaves that have yellow veins and red brown hairs on the underside that are native to East Asia.[10]

Image Name Distribution
Rhododendron arizelum Balf.f. & Forrest 1920 China (Xizang, Yunnan), Myanmar
Rhododendron basilicum Balf.f. & W.W.Sm. 1916 China (Yunnan), Myanmar
Rhododendron coriaceum Franch. 1898 China (Xizang, Yunnan)
Rhododendron falconeri Hook.f. 1849 Nepal, India (Sikkim, Arunachal Pradesh, West Bengal), Bhutan
Rhododendron fictolacteum Balf.f. 1916 China (Sichuan, Xizang, Yunnan), Myanmar
Rhododendron galactinum Balf.f. ex Tagg 1926 China (Sichuan)
Rhododendron hodgsonii Hook.f. 1851 China (Xizang), Bhutan, India (Sikkim), Nepal
Rhododendron mechukae A.A.Mao & A.Paul 2013 India (Arunachal Pradesh)
Rhododendron preptum Balf.f. & Forrest 1920 China (Yunnan), Myanmar
Rhododendron rex H.Lév. 1914 China (Sichuan, Xizang, Yunnan) Myanmar
Rhododendron rothschildii Davidian 1972 China (Yunnan)
Rhododendron semnoides Tagg & Forrest 1926 China (Xizang, Yunnan)
Rhododendron sinofalconeri Balf.f. 1916 China (Yunnan), Vietnam
Rhododendron titapuriense A.A.Mao, K.N.E.Cox & D.F.Chamb. 2013 India (Arunachal Pradesh)

Fortunea

Rhododendron subsect. Fortunea is a subsection of section Ponticum in Hymenanthes consisting of 37 species of shrubs or trees native to East Asia.[11][12]

Image Name Distribution
Rhododendron asterochnoum Diels 1921 China (Sichuan)
Rhododendron auriculatum Hemsl. 1889 China (Shaanxi, Guizhou)
Rhododendron bailiense Y.P.Ma, Zhang & D.F.Chamb. 2015 China (Guizhou)
Rhododendron calophytum Franch. 1886 China (Chongqing, Gansu, Guizhou, Hubei, Shaanxi, Sichuan, Yunnan)
Rhododendron chihsinianum Chun & W.P.Fang 1957 China (Guangxi)
Rhododendron davidii Franch. 1886 China (Sichuan, Yunnan)
Rhododendron decorum Franch. 1886 China (Guizhou, SW Sichuan, SE Xizang, Yunnan), Myanmar
Rhododendron discolor Franch. 1895 China (Anhui, Chongqing, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Shaanxi, Sichuan, Yunnan, Zhejiang)
Rhododendron faithiae Chun 1934 China (Guangdong, Guangxi)
Rhododendron fortunei Lindl. 1859 China (Anhui, Fujian, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangxi, Shaanxi, Sichuan, Yunnan, Zhejiang)
Rhododendron glanduliferum Franch. 1886 China (Yunnan)
Rhododendron griffithianum Wight 1848 China (Xizang), Bhutan, N India, E Nepal, Sikkim
Rhododendron guihainianum G.Z.Li 1995 China (Guangxi)
Rhododendron hemsleyanum E.H.Wilson 1910 China (Sichuan)
Rhododendron huangpingense Xiang Chen & Jia Y.Huang 2010 China (Guizhou)
Rhododendron huanum W.P.Fang 1939 China (Chongqing, Guizhou, Sichuan, Yunnan)
Rhododendron jinchangense Z.H.Yang 1997 China (Yunnan)
Rhododendron jingangshanicum P.C.Tam 1982 China (Jiangxi)
Rhododendron jiulongshanense Xiang Chen & Jia Y.Huang 2010 China (Guizhou)
Rhododendron leigongshanense C.H.Yang, Z.G.Xie, Y.F.Yu & Z.R.Yang 2015 China (Guizhou)
Rhododendron liboense Zheng R.Chen & K.M.Lan 2003 China (Guizhou)
Rhododendron magniflorum W.K.Hu 1988 China (Guizhou)
Rhododendron maoerense W.P.Fang & G.Z.Li 1984 China (Guangxi)
Rhododendron miyiense W.K.Hu 1988 China (Sichuan)
Rhododendron nymphaeoides W.K.Hu 1988 China (Sichuan)
Rhododendron orbiculare Decne. 1877 China (Guangxi, Sichuan)
Rhododendron oreodoxa Franch. 1886 China (Gansu, Hubei, Shaanxi, Sichuan, Xizang)
Rhododendron platypodum Diels 1900 China (Chongqing)
Rhododendron praeteritum Hutch. 1922 China (Gansu, Hubei, Hunan, Qinghai)
Rhododendron praevernum Hutch. 1920 China (Guizhou, Hubei, Shaanxi, Sichuan, Yunnan)
Rhododendron qiaojiaense L.M.Gao & D.Z.Li 2009 China (Yunnan)
Rhododendron serotinum Hutch. China (Yunnan), Vietnam
Rhododendron sutchuenense Franch. 1895 China (Chongqing, Gansu, Guangxi, Guizhou, Hubei, Hunan, Shaanxi)
Rhododendron vernicosum Franch. 1898 China (Sichuan, Xizang, Yunnan)
Rhododendron verruciferum W.K.Hu 1989 China (Sichuan)
Rhododendron wolongense W.K.Hu 1988 China (Sichuan)
Rhododendron xiaoxidongense W.K.Hu 1990 China (Jiangxi)

Fulgensia

Rhododendron subsect. Fulgensia is a subsection of section Ponticum in Hymenanthes consisting of 3 species of shrubs with glossy leaves that have dark brown hairs on the underside native to East Asia.[13][14]

Image Name Distribution
Rhododendron fulgens Hook.f. 1851 China (Xizang), Bhutan, India (Sikkim), Nepal
Rhododendron miniatum Cowan 1937 China (Xizang)
Rhododendron rawatii I.D.Rai & B.S.Adhikari 2020 India (Uttarakhand)

Fulva

Rhododendron subsect. Fulva is a subsection of section Ponticum in Hymenanthes comprising 2 species of shrubs native to East Asia.[15]

Image Name Distribution
Rhododendron fulvum B. Balfour & W. W. Smith 1917 China (Sichuan, Xizang, W Yunnan), Myanmar
Rhododendron uvariifolium Diels 1912 China (Sichuan, Xizang, Yunnan)

Glischrum

Rhododendron subsect. Glischrum is a subsection of section Ponticum in Hymenanthes comprising 9 species of shrubs native to East Asia.[16]

Image Name Distribution
Rhododendron adenosum (Cowan & Davidian) Davidian 1978 China (Sichuan)
Rhododendron crinigerum Franch. 1898 China (Sichuan, Xizang, Yunnan)
Rhododendron diphrocalyx Balf.f. 1919 China (Yunnan)
Rhododendron glischroides Tagg & Forrest 1930 Myanmar
Rhododendron glischrum Balf.f. & W.W.Sm. 1916 China (Xizang, Yunnan) India, Myanmar
Rhododendron habrotrichum Balf.f. & W.W.Sm. 1916 China (Yunnan), Myanmar
Rhododendron recurvoides Tagg & Forrest 1929-1931 publ. 1932 Myanmar
Rhododendron spilotum Balf.f. & Farrer 1922 Myanmar
Rhododendron vesiculiferum Tagg 1930 China (Xizang, Yunnan), Myanmar

Grandia

Rhododendron subsect. Grandia is a subsection of section Ponticum in Hymenanthes that comprises 15 species of trees with large leaf blades covered with trichomes native to East Asia.[17][18]

Image Name Distribution
Rhododendron balangense W.P.Fang 1983 China (Sichuan)
Rhododendron grande Wight 1847 China(Xizang), Bhutan, India (Arunachal Pradesh, Sikkim), Nepal
Rhododendron kesangiae D.G.Long & Rushforth 1988 publ. 1989 Bhutan
Rhododendron macabeanum G.Watt ex Balf.f. 1920 China (Xizang), Myanmar
Rhododendron magnificum Kingdon Ward 1935 China (Xizang)
Rhododendron montroseanum Davidian 1979 China (Xizang)
Rhododendron oreogenum L. C. Hu 1992 China (Xizang)
Rhododendron praestans I. B. Balfour & W. W. Smith 1916 China (Xizang, Yunnan)
Rhododendron protistum I. B. Balfour & Forrest 1920 China (Xizang, Yunnan), Myanmar
Rhododendron pudorosum Cowan 1937 China (Xizang)
Rhododendron sidereum I. B. Balfour 1920 China (Yunnan), Myanmar
Rhododendron sinogrande I. B. Balfour & W. W. Smith 1916 China (Xizang, Yunnan), Myanmar
Rhododendron suoilenhense D.F.Chamb., N.T.T.Huong & Rushforth 2020 Vietnam
Rhododendron watsonii Hemsley & E. H. Wilson 1910 China (Gansu, Sichuan)
Rhododendron wattii Cowan 1936 India (Assam)

Griersoniana

Rhododendron subsect. Griersoniana is a subsection of section Ponticum in Hymenanthes that contains a single species of shrub.[19]

Image Name Distribution
Rhododendron griersonianum B. Balfour & Forrest 1919 China (Yunnan), Myanmar

Maculifera

Rhododendron subsect. Maculifera is a subsection of section Ponticum in Hymenanthes that contains 15 species of shrubs or small trees with tomentose stems and rough bark.[20]

Image Name Distribution
Rhododendron anwheiense E.H.Wilson 1925 China (Anhui)
Rhododendron longesquamatum C.K.Schneid. 1909 China (Sichuan)
Rhododendron maculiferum Franch. 1895 China ( Anhui, Gansu, Guangxi, Guizhou, Hubei, Hunan, Jiangxi, Shaanxi, Sichuan, Zhejiang)
Rhododendron morii Hayata 1911 Taiwan
Rhododendron ochraceum Rehder & E.H.Wilson 1913 China (Sichuan, Yunnan)
Rhododendron pachyphyllum W.P.Fang 1983 China (Guangxi, Hunan)
Rhododendron pachysanthum Hayata 1913 Taiwan
Rhododendron pachytrichum Franch. 1886 China (Sichuan, Shaanxi)
Rhododendron pilostylum W.K.Hu 1988 China (Yunnan)
Rhododendron polytrichum W.P.Fang 1983 China (Guangxi, Hunan)
Rhododendron pseudochrysanthum Hayata 1908 Taiwan
Rhododendron sikangense W.P.Fang 1952 China (Sichuan)
Rhododendron strigillosum Franch. 1886 China (Sichuan, Yunnan)
Rhododendron subroseum Xiang Chen & Jia Y.Huang 2010 China (Guizhou)
Rhododendron ziyuanense P.C.Tam 1982 China (Guangxi)

Lanata

Rhododendron subsect. Lanata contains 6 species of small trees found in east asia[21]

Image Name Distribution
Rhododendron circinnatum Cowan & Kingdon-Ward 1936 China (Xizang)
Rhododendron lanatoides D.F.Chamb. 1982 China (Xizang)
Rhododendron lanatum Hook.f. 1851 China (Xizang), Bhutan, India (Sikkim)
Rhododendron luciferum (Cowan) Cowan 1953 China (Xizang)
Rhododendron poluninii Davidian 1989 Bhutan
Rhododendron tsariense Cowan 1937 China (Xizang), Bhutan, India

Parishia

Rhododendron subsect. Parishia is a subsection of section Ponticum in Hymenanthes that contains 8 species of small trees found in east asia.[22]

Image Name Distribution
Rhododendron elliottii Brandis ex Lace & W.W.Sm. 1906 India, Assam (Manipur, Nagaland)
Rhododendron facetum Balf.f. & Kingdon-Ward 1917 China (Yunnan), Myanmar, Vietnam
Rhododendron flavoflorum T.L.Ming 1984 China (Yunnan)
Rhododendron huidongense T.L.Ming 1981 China (Sichuan)
Rhododendron kyawii Lace & W.W.Sm. 1914 China (Yunnan), Myanmar
Rhododendron parishii C.B.Clarke 1882 Myanmar
Rhododendron schistocalyx Balf.f. & Forrest 1920 China (Yunnan)
Rhododendron urophyllum W.P.Fang 1983 China (Sichuan)

Pontica

Rhododendron subsect. Pontica is a subsection of section Ponticum in Hymenanthes consisting of 13 species of shrubs to small trees native to North America, Europe, and East Asia.[23]

Image Name Distribution
Rhododendron aureum Georgi 1775 China (Jilin, Liaoning), Japan, Korea, Mongolia, Russia
Rhododendron brachycarpum D.Don ex G.Don 1834 Japan and Korea
Rhododendron catawbiense Michx. 1803 United States (West Virginia south to northern Alabama.)
Rhododendron caucasicum Pall. 1784 Transcaucasus and Anatolia
Rhododendron degronianum Carrière Japan (-Honshu)
Rhododendron hyperythrum Hayata 1913 Taiwan
Rhododendron japonoheptamerum Kitam. 1987 Japan
Rhododendron macrophyllum D.Don ex G.Don United States (Washington, California and northern Oregon), Canada (British Columbia)
Rhododendron makinoi Tagg ex Nakai 1834 Japan
Rhododendron maximum L. 1753 Alabama north to coastal Nova Scotia.
Rhododendron ponticum L. 1762 Bulgaria, Lebanon-Syria, North Caucasus, Portugal, Spain, Transcaucasus, Turkey
Rhododendron smirnowii Trautv. ex Regel 1885 Transcaucasus, Turkey
Rhododendron ungernii Trautv. ex Regel 1885 Transcaucasus, Turkey

Selensia

Rhododendron subsect. Selensia is a subsection of section Ponticum in Hymenanthes consisting of 8 species of shrubs to small trees with campanulate flowers.[24]

Image Name Distribution
Rhododendron bainbridgeanum Tagg & Forrest 1930 China ( Xizang, Yunnan), Myanmar
Rhododendron calvescens Balf.f. & Forrest 1919 China ( Xizang, Yunnan)
Rhododendron dasycladoides Hand.-Mazz. 1936 China ( Sichuan, Yunnan)
Rhododendron esetulosum Balf.f. & Forrest 1920 China ( Xizang, Yunnan)
Rhododendron hirtipes Tagg ex Kingdon-Ward 1930 China ( Xizang )
Rhododendron martinianum Balf.f. & Forrest 1919 China ( Xizang, Yunnan), Myanmar
Rhododendron selense Franch. 1898 China ( Xizang, Sichuan, Yunnan)
Rhododendron setiferum Balf.f. & Forrest 1919 China ( Xizang, Yunnan)

Taliensia

Rhododendron subsect. Taliensia is a subsection of section Ponticum in Hymenanthes consisting of 57 species of shrubs and small trees with their leaves covered with indumentum.[25]

Image Name Distribution
Rhododendron adenogynum Diels 1912 China ( Xizang, Sichuan, Yunnan)
Rhododendron aganniphum Balf.f. & Kingdon-Ward 1917 China (Qinghai, Sichuan, Xizang, Yunnan)
Rhododendron alutaceum Balf.f. & W.W.Sm. 1917 China ( Xizang, Sichuan, Yunnan)
Rhododendron aureodorsale (W.P.Fang ex J.Q.Fu) Y.P.Ma & J.Nielsen 2012 China (Shaanxi)
Rhododendron balfourianum Diels 1912 China ( Sichuan, Yunnan)
Rhododendron barkamense D.F.Chamb. 1982 China ( Sichuan )
Rhododendron beesianum Diels 1912 China ( Xizang, Sichuan, Yunnan), Myanmar
Rhododendron bhutanense D.G.Long & S.Bowes-Lyon 1989 Bhutan
Rhododendron bureavii Franch. 1887 China ( Sichuan, Yunnan)
Rhododendron clementinae Forrest ex W.W.Sm. 1915 China (Shaanxi, Sichuan, Yunnan)
Rhododendron codonanthum Balf.f. & Forrest 1922 China (Yunnan)
Rhododendron coeloneurum Diels 1900 China (Guizhou, Sichuan, Yunnan)
Rhododendron comisteum Balf.f. & Forrest 1919 China ( Xizang, Yunnan)
Rhododendron dachengense G.Z.Li 2001 China ( Guangxi )
Rhododendron danbaense L.C.Hu 1986 China ( Sichuan )
Rhododendron dayiense M.Y.He 1997 China ( Sichuan )
Rhododendron detersile Franch. 1898 China (Shaanxi, Sichuan)
Rhododendron dignabile Cowan 1937 China ( Xizang )
Rhododendron dumicola Tagg & Forrest 1930 China ( Yunnan)
Rhododendron elegantulum Tagg & Forrest 1927 China ( Sichuan, Yunnan)
Rhododendron faberi Hemsl. 1889 China ( Sichuan )
Rhododendron heizhugouense M.Y.He & L.C.Hu 1996 China ( Sichuan )
Rhododendron lacteum Franch. 1886 China ( Yunnan)
Rhododendron lulangense L.C.Hu & Tateishi 1992 China ( Xizang )
Rhododendron mimetes Tagg & Forrest 1927 China ( Sichuan )
Rhododendron montiganum T.L.Ming 1984 China ( Yunnan)
Rhododendron nakotiltum Balf.f. & Forrest 1920 China ( Yunnan)
Rhododendron nhatrangense Dop 1930 Vietnam
Rhododendron nigroglandulosum Nitz. 1975 China ( Sichuan )
Rhododendron phaeochrysum Balf.f. & Forrest 1917 China ( Xizang, Sichuan, Yunnan)
Rhododendron pomense Cowan & Davidian 1953 China ( Xizang )
Rhododendron potaninii Batalin 1891 China ( Gansu )
Rhododendron prattii Franch. 1895 China (Sichuan)
Rhododendron principis Bureau & Franch. 1891 China ( Xizang )
Rhododendron pronum Tagg & Forrest 1927 China ( Yunnan)
Rhododendron proteoides Balf.f. & W.W.Sm. 1916 China ( Xizang, Sichuan, Yunnan)
Rhododendron przewalskii Maxim. 1877 China ( Gansu, Qinghai, W Shaanxi, Sichuan)
Rhododendron pubicostatum T.L.Ming 1981 China ( Yunnan)
Rhododendron pugeense L.C.Hu 1992 China (Sichuan)
Rhododendron punctifolium L.C.Hu 1984 China (Yunnan)
Rhododendron roxieanum W.W.Sm. ex Forrest 1915 China ( Gansu, Shaanxi, Sichuan, Xizang, Yunnan )
Rhododendron roxieoides D.F.Chamb. 1982 China (Sichuan)
Rhododendron rufum Batalin 1891 China ( Gansu, Qinghai, Shaanxi, Sichuan )
Rhododendron scopulum (G.Z.Li) G.Z.Li 2010 China (Guangxi)
Rhododendron shanii W.P.Fang 1983 China (Anhui)
Rhododendron sphaeroblastum Balf.f. & Forrest 1920 China ( Sichuan, Yunnan)
Rhododendron taliense Franch. 1886 China (Yunnan)
Rhododendron tianmenshanense C.L.Peng & L.H.Yan 2007 China (Hunan)
Rhododendron torquescens D.F.Chamb. 2005 China ( Gansu )
Rhododendron traillianum Forrest & W.W.Sm. 1914 China ( Xizang, Sichuan, Yunnan)
Rhododendron trichogynum L.C.Hu 1992 China (Sichuan)
Rhododendron vellereum Hutch. ex Tagg 1930 China (Qinghai, Xizang)
Rhododendron wasonii Hemsl. & E.H.Wilson 1910 China (Sichuan)
Rhododendron wightii Hook.f. China (Xizang), Bhutan, Nepal, Sikkim
Rhododendron wiltonii Hemsl. & E.H.Wilson 1910 China (Sichuan)
Rhododendron yaoshanense L.M.Gao & S.D.Zhang 2008 China ( Yunnan)
Rhododendron zhongdianense L.C.Hu 1984 China ( Yunnan)

Thomsonia

Rhododendron subsect. Thomsonia is a subsection of section Ponticum in Hymenanthes consisting of 17 species of small trees with reddish flowers and peeling red bark native to East Asia.[26]

Image Name Distribution
Rhododendron bonvalotii Bureau & Franch. 1891 China (Sichuan)
Rhododendron cerasinum Tagg ex Kingdon-Ward 1930 China (Xizang), Myanmar
Rhododendron cyanocarpum (Franch.) Franch. ex W.W.Sm. 1914 China (Yunnan)
Rhododendron eclecteum Balf.f. & Forrest 1920 China (Sichuan, Xizang, Yunnan), Myanmar
Rhododendron eurysiphon Tagg & Forrest 1930 China (Xizang)
Rhododendron faucium D.F.Chamb. 1978 China (Xizang)
Rhododendron hookeri Nutt. 1853 China (Xizang), India
Rhododendron hylaeum Balf.f. & Farrer 1922 China (Xizang, Yunnan), Myanmar
Rhododendron meddianum Forrest 1920 China (Yunnan), Myanmar
Rhododendron megalanthum M.Y.Fang 1988 China (Xizang)
Rhododendron populare Cowan 1937 China (Xizang)
Rhododendron ramipilosum T.L.Ming 1984 China (Xizang)
Rhododendron sherriffii Cowan 1937 China (Xizang)
Rhododendron stewartianum Diels 1912 China (Xizang, Yunnan), Myanmar
Rhododendron subansiriense D.F.Chamb. & Pet.A.Cox 1978 Bhutan, India ( Sikkim, Arunachal Pradesh)
Rhododendron thomsonii Hook.f. 1851 China (Xizang), Bhutan, India (Sikkim), Nepal,
Rhododendron viscidifolium Davidian 1966 China (Xizang)

Venatora

Image Name Distribution
Rhododendron venator Tagg ex L. Rothschild 1933 China (Xizang)

Williamsiana

Rhododendron subsect. Williamsiana is a subsection of section Ponticum in Hymenanthes consisting of 2 species[27]

Image Name Distribution
Rhododendron venator Rehder & E.H.Wilson 1913 China (Guizhou, Sichuan, Xizang, Yunnan)
Rhododendron leishanicum W.P.Fang & X.S.Zhang 1983 China (Guizhou)

Pentanthera

Rhododendron sect. Pentanthera is a section of subgenus Hymenanthes in the genus Rhododendron. It comprises 15-16 species of deciduous shrubs native to temperate regions of the Northern Hemisphere.

It includes two subsections:

  • Pentathera
  • Sinensia

Pentanthera

See also: North American azaleas

Species include:

Image Name Distribution
Rhododendron alabamense Alfred Rehder, 1921 (Alabama azalea) United States (Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina, Tennessee)
Rhododendron arborescens John Torrey, 1824 United States (West Virginia, Pennsylvania, Tennessee, North Carolina, Georgia and Alabama.)
Rhododendron atlanticum Alfred Rehder, 1921 United States (New Jersey south to Georgia.)
Rhododendron austrinum (Small) Rehder 1917 United States (Alabama, Florida, Georgia, and Mississippi)
Rhododendron calendulaceum John Torrey, 1824 United States (southern Pennsylvania and Ohio to northern Georgia.)
Rhododendron canadense (L.) Torr. Canada in Newfoundland and extends into eastern Ontario and the United States from New York, New Jersey, and at high altitudes in the Appalachian Mountains further south to Pennsylvania.
Rhododendron canescens (Michx.) Sweet 1889 United States(Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia )
Rhododendron colemanii Ronald F. Miller, 2008 United States(Alabama and western Georgia)
Rhododendron cumberlandense Emma Lucy Braun, 1941 United States (Kentucky, Tennessee, Georgia, Alabama, and North Carolina.)
Rhododendron eastmanii Kathleen Anne Kron, 1999 United States (South Carolina)
Rhododendron flammeum (Michx.) Sarg. 1917 United States(Georgia and South Carolina)
Rhododendron luteum Sweet 1911 (yellow azalea, honeysuckle azalea) southern Russia; and in Asia
Rhododendron occidentale Torr. & A.Gray 1876 United States(Oregon, California)
Rhododendron periclymenoides (Michx.) Shinners 1962 (pink azalea, pinxterbloom azalea, pinxter flower) United States(southern New York south to Georgia)
Rhododendron prinophyllum (Small) Millais 1917 (rose azalea, roseshell azalea) Eastern United States
Rhododendron prunifolium (Small) Millais 1917 United States( Georgia, Alabama )
Rhododendron viscosum (L.) Torr. 1824 (Swamp azalea) Eastern United States

Sinensia

Species include:

Image Name Distribution
Rhododendron molle (Blume) G.Don 1834 S. China
Rhododendron japonicum[28] (A.Gray) Suringar, 1908 Japan (Honshu, Shikoku, N. Kyushu).

The section is closely related to sect. Rhodora, differing from it in the flower corolla having five fully developed lobes, whereas sect. Rhodora has the upper three lobes joined into a single three-lipped lobe.

Cultivation

Most (but not all) of the cultivated azaleas belong to species in this section, and hybrids derived from them.

References

  1. ^ Chamberlain, DF; Hyam R; Argent G; Fairweather G; Walter KS (1996). The genus Rhododendron: its classification and synonymy. Royal Botanic gardens Edinburgh. ISBN 1-872291-66-X. Archived from the original on July 14, 2014. Retrieved July 3, 2014.
  2. ^ Goetsch, Loretta A.; Eckert, Andrew J.; Hall, Benjamin D. (July–September 2005). "The molecular systematics of Rhododendron (Ericaceae): a phylogeny based upon RPB2 gene sequences". Systematic Botany. 30 (3): 616–626. Bibcode:2005SysBo..30..616G. doi:10.1600/0363644054782170. S2CID 51949019.
  3. ^ Dorsey, Frank (1991). "JARS v45n3". Subsection Arborea. 45 (3). Retrieved 2025-01-26.
  4. ^ "Rhododendron subsect. Arborea in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-01-26.
  5. ^ "Rhododendron subsect. Argyrophylla in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-09-22.
  6. ^ "Rhododendron subsect. Argyrophylla". worldfloraonline.org. Retrieved 2025-09-22.
  7. ^ "Rhododendron subsect. Barbata in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-07-20.
  8. ^ "Rhododendron subsect. Campanulata in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-01-26.
  9. ^ "Rhododendron subsect. Campylocarpa in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-10-09.
  10. ^ "Rhododendron subsect. Falconera in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-10-09.
  11. ^ "Rhododendron subsect. Fortunea". worldfloraonline.org. Retrieved 2025-01-29.
  12. ^ "Rhododendron subsect. Fortunea in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-02-20.
  13. ^ "Rhododendron subsect. Fulgensia in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-02-20.
  14. ^ "Rhododendron subsect. Fulgensia". worldfloraonline.org. Retrieved 2025-01-29.
  15. ^ "Rhododendron uvariifolium in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-01-26.
  16. ^ "Rhododendron subsect. Glischra in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-01-26.
  17. ^ "Rhododendron subsect. Grandia in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-01-26.
  18. ^ "The Grandia Subsection". Virginia Tech Scholarly Communication University Libraries. Retrieved 2025-01-26.
  19. ^ "Rhododendron subsect. Griersoniana in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-01-26.
  20. ^ "Rhododendron subsect. Maculifera in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-11-17.
  21. ^ "Rhododendron subsect. Lanata in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-11-02.
  22. ^ "Rhododendron subsect. Parishia in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-10-15.
  23. ^ "Rhododendron sect. Pontica". worldfloraonline.org. Retrieved 2025-01-29.
  24. ^ "Rhododendron subsect. Selensia in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-11-02.
  25. ^ "Rhododendron subsect. Taliensia in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-11-17.
  26. ^ "Rhododendron subsect. Thomsonia in Flora of China @ efloras.org". eFloras.org Home. Retrieved 2025-10-12.
  27. ^ "Rhododendron sect. Williamsiana". worldfloraonline.org. Retrieved 2025-01-29.
  28. ^ https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:60454333-2

Bibliography

allikas: http://en.wikipedia.org/wiki/Hymenanthes