Kalanchoe × houghtonii
| Kalanchoe × houghtonii | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Saxifragales |
| Family: | Crassulaceae |
| Genus: | Kalanchoe |
| Species: | K. × houghtonii
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| Binomial name | |
| Kalanchoe × houghtonii D.B.Ward
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| Synonyms | |
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Kalanchoe × houghtonii is a hybrid between Kalanchoe daigremontiana and Kalanchoe delagoensis named after Arthur Duvernoix Houghton. It is often confused with Kalanchoe daigremontiana which has strongly cordate to auriculate or even peltate leaves, while the leaves of Kalanchoe × houghtonii are narrower and the leaf base is attenuate, cuneate to weakly cordate or auriculate.[1] In hortuculture, it is often mislabelled as Kalanchoe serrata, which is a different species.
There are four morphotypes (A, B, C, and D), and only Morphotype A is considered invasive.[2] Morphotypes A, B, and C would finally transition to tricussate (alternative or ternately whorled) leaves like K. delagoensis, while the leaves of Morphotype D remain decussate (opposite) like those of K. daigremontiana.[3][4]
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Morphotype A -
Morphotype B
References
- ^ Shaw, J.M.H. (2008). "An investigation of the cultivated Kalanchoe daigremontiana group, with a checklist of Kalanchoe cultivars" (PDF). Hanburyana. 3: 17–79.
- ^ Pascual-Díaz, Joan Pere; Besolí, Neus; López-Pujol, Jordi; Nualart, Neus; Pérez-Lorenzo, Iván; Shtein, Ronen; Valenzuela, Laura; Garcia, Sònia; Vitales, Daniel (2025-09-02). "The winner takes it all: a single genotype of Kalanchoe × houghtonii is a global invader". Annals of Botany. 136 (1): 179–198. doi:10.1093/aob/mcaf076. ISSN 0305-7364. PMC 12401883. PMID 40273308.
- ^ Shtein, Ronen; Smith, Gideon F.; Ikeda, Jun (2021-11-09). "Aspects of the taxonomy of the Kalanchoe daigremontiana species complex (Crassulaceae subfam. Kalanchooideae) and associated interspecific hybrids in southern Madagascar, with the description of a new nothospecies, K. ×descoingsii (=K. laetivirens × K. tubiflora)". Phytotaxa. 524 (4): 235–260. doi:10.11646/phytotaxa.524.4.2. ISSN 1179-3163.
- ^ Smith, Gideon F.; Condy, Gillian (2025). "Kalanchoe ×houghtonii" (PDF). Flowering Plants of Africa. 69: 86–99.