Lamiaceae

Achyrospermum Blume

First published in Bijdr. Fl. Ned. Ind.: 840 (1826)
This genus is accepted
The native range of this genus is Tropical Africa to Malesia.

Descriptions

Nina Davies, Gemma Bramley & Don Kirkup, Royal Botanic Gardens, Kew

Morphology Leaves
Toothed, petiolate
Morphology Reproductive morphology Inflorescences Bracts
Distinct from and much smaller than the leaves, mostly broadly ovate to oblate, often caducous
Morphology Reproductive morphology Fruits Fruiting calyx
5-lobed, lobes subequal or unequal (3/2)
Morphology Reproductive morphology Flowers Corolla
Weakly 2-lipped, 4-lobed (1/3), reddish to purple to white or sometimes red, posterior lip short, emarginate, scarcely hooded
Morphology Reproductive morphology Flowers Androecium Stamens
Not or shortly exserted, thecae confluent
Morphology General Habit
Woody herbs or shrubs, often scandent, with simple hairs
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma-lobes equal or slightly unequal
Morphology Reproductive morphology Fruits
Nutlets with scales in apical half, mostly with sessile glands. 2n = 28, 84, 88
Distribution
Up to about 25 spp., tropical Africa, Madagascar, Mascarenes, Seychelles, Comores, from Nepal and NE India to S China and Thailand, Indonesia and the Philippines
Morphology Reproductive morphology Inflorescences
Terminal and/or axillary, thyrsoid, dense
[LKGF]

Lamiaceae (Labiatae), A.J. Paton, G. Bramley, O. Ryding, R.M. Polhill, Y.B. Harvey, M. Iwarsson, F. Willis, P.B. Phillipson, K. Balkwill, C.W. Lukhoba, D.F. Otieno, & R.M. Harley. Achyrospermum, R.M. Polhill. Flora of Tropical East Africa. 2009

Morphology General Habit
Woody herbs or shrubs, sometimes scandent, with an indumentum of simple hairs and often some small sessile glands particularly evident on the corolla
Morphology Stem
Stems rounded to subquadrangular
Morphology Leaves
Leaves opposite, petiolate, toothed
Morphology Reproductive morphology Inflorescences
Inflorescences terminal and/or axillary, thyrsoid, dense; bracts distinct from and much smaller than leaves, oblanceolate to broadly elliptic or oblate, subtending 3–8 flowers; bracteoles smaller or not evident
Morphology Reproductive morphology Flowers Calyx
Calyx 5-lobed; lobes subequal or the anterior 2 set lower and a little smaller
Morphology Reproductive morphology Flowers Corolla
Corolla 2-lipped, 4-lobed, white to purple or pink to red; posterior lip short, emarginate, scarcely hooded; anterior lip with a jaw-like anterior lobe and 2 small rounded-triangular lateral lobes, usually pubescent
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 4, rather shortly exserted, the posterior pair a little shorter; thecae confluent
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary deeply 4-lobed; style gynobasic, bifid, branches equal
Morphology Reproductive morphology Fruits
Nutlets with scales on upper half, sometimes with sessile glands.
[FTEA]

Sources

  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Lamiaceae Key Genus Fact Sheets

    • Nina Davies, Gemma Bramley and Don Kirkup, Royal Botanic Gardens, Kew
    • http://creativecommons.org/licenses/by/3.0