Leichhardtia is a genus of flowering plants in the dogbane family (Apocynaceae). It includes 85 species native to mainland Australia, Papuasia, New Caledonia, and Lord Howe Island.^[1]

85 species are currently accepted:^[1]

• Leichhardtia ambuntiensis (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia arachnoidea (Schltr.) P.I.Forst. – New Guinea
• Leichhardtia araujacea (F.Muell.) P.I.Forst. – northeastern Queensland
• Leichhardtia archboldiana (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia arfakensis (P.I.Forst.) P.I.Forst. – western New Guinea
• Leichhardtia argillicola (P.I.Forst.) P.I.Forst. – western New Guinea
• Leichhardtia assimulata (S.Moore) Liede, Gâteblé & Meve – central and southern New Caledonia
• Leichhardtia australis R.Br. – central and western Australia
• Leichhardtia belensis (P.I.Forst.) P.I.Forst. – western New Guinea
• Leichhardtia bilobata (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia bliriensis (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia brassii (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia brevifolia (Benth.) P.I.Forst. – eastern Queensland
• Leichhardtia brevis (P.I.Forst.) P.I.Forst. – eastern Queensland
• Leichhardtia brunnea (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia carrii (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia connivens (P.I.Forst.) P.I.Forst. – northern Northern Territory and northern Queensland
• Leichhardtia coronata (Benth.) P.I.Forst. – southeastern Queensland
• Leichhardtia cremea (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia cymulosa (Benth.) P.I.Forst. – northern Queensland
• Leichhardtia destituta (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia dischidioides (P.I.Forst.) P.I.Forst. – western New Guinea
• Leichhardtia divisicola (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia dognyensis (Guillaumin) Liede, Gâteblé & Meve – northern and Central New Caledonia
• Leichhardtia egregia (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia ericoides (Schltr.) Bullock – southeastern New Caledonia
• Leichhardtia flavescens (A.Cunn.) P.I.Forst. – southeastern Queensland to Eastern Victoria
• Leichhardtia flavida (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia fraseri (Benth.) P.I.Forst. – central-eastern and southeastern Queensland and northeastern New South Wales
• Leichhardtia glabrata (Schltr.) P.I.Forst. – New Guinea
• Leichhardtia glandulifera (C.T.White) P.I.Forst. – northern Western Australia, Northern Territory, and northern and eastern Queensland
• Leichhardtia globosa (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia gonoloboides (Schltr.) P.I.Forst. – New Guinea
• Leichhardtia goromotoorum (Gâteblé, Fleurot, Meve & Liede) Gâteblé, Fleurot, Meve & Liede – west-central New Caledonia
• Leichhardtia grandis (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia jensenii (P.I.Forst.) P.I.Forst. – northeastern Queensland
• Leichhardtia kaalaensis (Meve, Gâteblé & Liede) Liede, Gâteblé & Meve – northwestern New Caledonia
• Leichhardtia kebarensis (P.I.Forst.) P.I.Forst. – western New Guinea
• Leichhardtia kempteriana (Schltr.) P.I.Forst. – New Guinea
• Leichhardtia koniamboensis (Guillaumin) Liede, Gâteblé & Meve – New Caledonia
• Leichhardtia kuniensis (Meve, Gâteblé & Liede) Liede, Gâteblé & Meve – New Caledonia (Isle of Pines)
• Leichhardtia lacicola (P.I.Forst.) P.I.Forst. – Bismarck Archipelago
• Leichhardtia liisae (J.B.Williams) P.I.Forst. – northeastern New South Wales
• Leichhardtia lloydii (P.I.Forst.) P.I.Forst. – eastern Queensland and eastern New South Wales
• Leichhardtia longiloba (Benth.) P.I.Forst. – southeastern Queensland and northeastern New South Wales
• Leichhardtia lorea (S.Moore) P.I.Forst. – New Guinea
• Leichhardtia lyonsioides (Schltr.) Liede, Gâteblé & Meve – northern and Central New Caledonia
• Leichhardtia mackeeorum (Meve, Gâteblé & Liede) Liede, Gâteblé & Meve – east-central and southeastern New Caledonia
• Leichhardtia micradenia (Benth.) P.I.Forst. – eastern Queensland
• Leichhardtia microlepis (Benth.) P.I.Forst. – northeastern and eastern Queensland
• Leichhardtia millariae (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia mira (P.I.Forst.) P.I.Forst. – western New Guinea
• Leichhardtia neocaledonica (Meve, Gâteblé & Liede) Liede, Gâteblé & Meve – northwestern and west-northwestern New Caledonia
• Leichhardtia neomicrostoma (Meve, Gâteblé & Liede) Liede, Gâteblé & Meve – northern and west-northwestern New Caledonia
• Leichhardtia nigriflora (Guillaumin) Liede, Gâteblé & Meve – east-central and southeastern New Caledonia
• Leichhardtia oubatchensis (Schltr.) Liede, Gâteblé & Meve – northern New Caledonia
• Leichhardtia paludicola (P.I.Forst.) P.I.Forst. – northern Queensland
• Leichhardtia papillosa (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia papuana (P.Royen) P.I.Forst. – eastern New Guinea
• Leichhardtia parva (P.I.Forst.) P.I.Forst. – western New Guinea
• Leichhardtia paulforsteri (Meve, Gâteblé & Liede) Liede, Gâteblé & Meve – southeastern New Caledonia
• Leichhardtia poioensis (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia praestans (Schltr.) P.I.Forst. – New Guinea
• Leichhardtia primulina (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia pumila (P.I.Forst.) P.I.Forst. – central-eastern Queensland
• Leichhardtia quadrata (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia racemosa (F.Muell. ex Benth.) P.I.Forst. – northern Australia to northeastern New South Wales
• Leichhardtia rara (P.I.Forst.) P.I.Forst. – northeastern Queensland (near Cairns)
• Leichhardtia rostrata (R.Br.) P.I.Forst. – eastern Queensland, eastern New South Wales, eastern Victoria, and Lord Howe Island
• Leichhardtia spathulata (P.I.Forst.) P.I.Forst. – Solomon Islands
• Leichhardtia speciosa (Baill.) Liede, Gâteblé & Meve – New Caledonia
• Leichhardtia suaveolens (R.Br.) P.I.Forst. – central-eastern and southeastern New South Wales
• Leichhardtia subglobosa (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia torsiva (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia trilobata (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia tubulosa (F.Muell.) P.I.Forst. – Lord Howe Island (Mt. Gower)
• Leichhardtia tumida (P.I.Forst.) P.I.Forst. – New Guinea
• Leichhardtia tylophoroides (Schltr.) Liede, Gâteblé & Meve – New Caledonia
• Leichhardtia variabilis (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia variifolia (Guillaumin) Liede, Gâteblé & Meve – west-northwestern New Caledonia
• Leichhardtia velutina (R.Br.) P.I.Forst. – northern Australia
• Leichhardtia venusta (P.I.Forst.) P.I.Forst. – eastern New Guinea
• Leichhardtia viridiflora (R.Br.) P.I.Forst. – New Guinea and northern and eastern Australia
• Leichhardtia volcanica (P.I.Forst.) P.I.Forst. – Solomon Islands
• Leichhardtia weberlingiana (Liede) Liede, Gâteblé & Meve – north-central New Caledonia (col de Hô)