Geniostoma

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Gentianales

Familia: Loganiaceae
Tribus: Loganieae
Genus: Geniostoma
Species: G. angustifolium – G. antherotrichum – G. balansanum – G. biseriale – G. borbonicum – G. calcicola – G. celastrineum – G. clavatum – G. cyrtandrae – G. degeneri – G. densiflora – G. erythrosperma – G. fagraeoides – G. gagnae – G. glaucescens – G. grandifolium – G. hedyosmifolium – G. helleri – G. hirtellum – G. hosakanum – G. huttonii – G. hymenopodum – G. imbricatum – G. kaalae – G. leenhoutsii – G. lorencianum – G. lydgatei – G. macrophyllum – G. mooreanum – G. novae-caledoniae – G. pedunculatum – G. petiolosum – G. pumilum – G. randianum – G. rapense – G. rarotongensis – G. remyana – G. rupestre – G. stipulare – G. sykesii – G. tinifolium – G. trichostylum – G. trifolium – G. umbellatum – G. venosum – G. vestitum – G. waialealae – G. waiolani – G. weinlandii
Name

Geniostoma J.R.Forst. & G.Forst., Char. Gen. Pl., ed. 2. 23. (1776)

Type species: Geniostoma rupestre J.R.Forst. & G.Forst., Char. Gen. Pl., ed. 2. 24, t. 12 (1776).

Synonyms

Heterotypic
Anasser Juss.
Aspilobium Sol. ex A.Cunn.
Haemospermum Reinw. ex Blume
Labordia Gaudich.
Lasiostomum Zipp. ex Blume
Nautophylla Guillaumin
Tayotum Blanco

References

Forster, J.R. & Forster, J.G.A.} 1776. Characteres Generum Plantarum:quas in itinere ad insulas maris Australis, collegerunt, descripserunt, delinearunt, annis 1772-1775; Edition 2 23.
Conn, B.J. 1980. A taxonomic revision of Geniostoma subg. Geniostoma (Loganiaceae). Blumea 26(2): 245–364.
Govaerts, R. et al. 2020. Geniostoma in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Oct. 19. Reference page.
International Plant Names Index. 2020. Geniostoma. Published online. Accessed: Oct. 19 2020.
Tropicos.org 2020. Geniostoma. Missouri Botanical Garden. Published online. Accessed: 19 Oct. 2020.

Geniostoma is a genus of around 25 species of flowering plants in the family Loganiaceae. They are shrubs or small trees, with inflorescences borne in the axils of the simple, petiolate, oppositely-arranged leaves.[1] The flowers are arranged in cymes, and each is pentamerous.[1]

The name Geniostoma derives from the Greek words γένειον (geneion; "beard") and στόμα (stoma; "mouth"), referring to the hairs in the corolla tube of some species.[2] The genus is widely distributed across the Pacific Ocean from Japan, Malesia to Australia in the west, and east to the Tuamotu Archipelago; one species is also found on the Mascarene Islands.[2]

The Hawaiian endemic genus Labordia has been included in Geniostoma by some authors.[2][3] These two genera have been grouped together in the family "Geniostomaceae",[4] but are considered by the Angiosperm Phylogeny Group to be part of a wider Loganiaceae.[5]
Selected species

Geniostoma astylum
Geniostoma clavigerum
Geniostoma confertiflorum
Geniostoma gagneae
Geniostoma huttonii (Lord Howe Island)
Geniostoma ligustrifolium – hangehange
Geniostoma macrophyllum
Geniostoma petiolosum (Lord Howe Island)
Geniostoma quadrangulare
Geniostoma rapense
Geniostoma rupestre
Geniostoma stipulare
Geniostoma sykesii (Cook Islands)
Geniostoma umbellatum
Geniostoma uninervium

References

Li Ping-tao & Antony J. M. Leewenberg. "Geniostoma J. R. Forster & G. Forster". Myrsinaceae through Loganiaceae. Flora of China. Vol. 15.
"Geniostoma". Flora of Australia Online. Australian National Botanic Gardens. Retrieved March 9, 2012.
"List of genera in family Loganiaceae". Vascular Plant Families and Genera. Royal Botanic Gardens, Kew. Retrieved March 9, 2012.
D. J. Mabberley (1997). The Plant-book: a Portable Dictionary of the Vascular Plants (2nd ed.). Cambridge University Press. p. 296. ISBN 9780521414210.

P. F. Stevens. "Angiosperm Phylogeny Website". Retrieved March 9, 2012.

Further reading
B. J. Conn (1980). "A taxonomic revision of Geniostoma subg. Geniostoma (Loganiaceae)". Blumea. 26 (2): 245–364.