''Trimezia martinicensis'' is a species of

bulb In botany, a bulb is structurally a short stem with fleshy leaves or leaf basesBell, A.D. 1997. ''Plant form: an illustrated guide to flowering plant morphology''. Oxford University Press, Oxford, U.K. that function as food storage organs duri ...

ous plant in the family Iridaceae. Originally from South America and the West Indies, it is now widely naturalized throughout the tropics., p. 377 Common names include Martinique trimezia, yellow walking iris and forenoon yellow flag., p. 57

Distinction from ''Trimezia steyermarkii''

''Trimezia martinicensis'' is closely related to '' T. steyermarkii'', with which it has been widely confused. Clive Innes describes ''T. martinicensis'' as having a brown mark at the base of each outer tepal, whereas ''T. steyermarkii'' has brownish-purple bands. In Kubitzki & Huber (1998), the flowers of ''T. martinicensis'' are shown as opening less widely than those of ''T. steyermarkii''. The inner tepals of both species are S-shaped in cross-section; those of ''T. martinicensis'' are more-or-less upright (Innes describes them as "folded inwards"), whereas those of ''T. steyermarkii'' bend outwards into a more elongated shape so that the top of the S is not visible from above.
p. 304
/ref> A diagnostic feature is that the style crests of ''T. martinicensis'' are short, whereas those of ''T. steyermarkii'' are longer, about long, comparable in length to its anthers, which are about long., translated at Another difference is that the leaves of ''T. martinicensis'' are narrower, only about wide, whereas those of ''T. steyermarkii'' are wide.

References

{{Taxonbar, from=Q7842228 martinicensis Flora of the Caribbean Flora of South America Plants described in 1962 Flora without expected TNC conservation status