Gymnosiphon Blume 1827
Creators: name: Cheek, Martin
name: Traclet, Sébastien
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Dioscoreales
Burmanniaceae
Gymnosiphon

description: KEY TO THE SPECIES OF GYMNOSIPHON IN AFRICA, COMORO ISLANDS AND MADAGASCAR
1. Stigmas with filiform extensions exserted from flower at anthesis ................................................................ 2
— Stigmas lacking filiform extensions .............................................................................................................. 5
2. Flowers zygomorphic, inflorescence capitate, Madagascar ................................................... G. marieae Cheek — Flowers actinomorphic, inflorescences cymose, Africa and Comoro Islands ................................................. 3
3. Perianth tube 2-5 mm long ......................................................................................................................... 4 — Perianth tube 1 mm long ................................................................................. G. constrictus Maas & H.Maas
4. Inflorescence bracts about as long as rhachis internodes, inner tepals absent; stigmas horizontal; tepals changing from white to translucent at anthesis ............................................................... G. mayottensis Cheek, sp. nov.
— Inflorescence bracts <1/4 as long as rhachis internodes, inner tepals present; stigmas pendulous; tepals white at anthesis ............................................................................................................ G. longistylus (Benth.) Hutch.
5. Rootstock with numerous bulbils, ovary ribbed, inner tepals absent, Malawi, NE Zambia, S Tanzania
.................................................................................................................................. G. afro-orientalis Cheek — Rootstocks lacking bulbils, ovary smooth, inner tepals present, Guineo-Congolian Africa or Madagascar ....... 6
6. Flowers sessile or subsessile, pedicel if present to 0.5 mm long .................................................................... 7 — Flowers with a distinct pedicel 1 mm long or more ..................................................................................... 8
7. Flowers white, perianth tube> 10 mm long ................................................................... G. bekensis Letouzey — Flowers yellow or white, perianth tube <5 mm long .............................................. G. samoritoureanus Cheek
8. Plants commonly 15-35 cm tall; base of stem completely covered in many tens of brown leaf-scales, E. Africa ...................................................................................................................................... G. usambaricus Engl.
— Plants always <15 cm tall; base of stem sparsely covered, with only 3-4 leaf scales, Madagascar ..................... .................................................................................................................................. G. danguyanus H.Perrier
description: Published as part of Cheek, Martin & Traclet, Sébastien, 2020, Gymnosiphon mayottensis Cheek, sp. nov. (Burmanniaceae) a new species from Mayotte, Comoro Islands, pp. 179-188 in Adansonia 42 (8) on page 181, DOI: 10.5252/adansonia2020v42a8, http://zenodo.org/record/3877454