Mexipedium xerophyticum

Taxobox
name = "Mexipedium xerophyticum"

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image_width = 250px
regnum = Plantae
divisio = Magnoliophyta
classis = Liliopsida
ordo = Asparagales
familia = Orchidaceae
subfamilia = Cypripedioideae
tribus = Mexipedieae
subtribus = Mexipediinae
genus = "Mexipedium"
genus_authority = V.A.Albert & M.W.Chase
species = "M. xerophyticum"
binomial = "Mexipedium xerophyticum"
binomial_authority = (Arenas, Salazar & Hágsater) V.A.Albert & M.W.Chase

"Mexipedium" is a monotypic genus of the Orchid family Orchidaceae, subfamily Cypripedioideae, consisting of only one species, "Mexipedium xerophyticum". It is also the single genus of tribe Mexipedieae and subtribe Mexipediinae. This species was initially described as "Phragmipedium xerophyticum" by Soto Arenas, Salazar & Hàgsater in 1990, but transferred to its own genus by Albert & Chase in 1992, in part based on results from DNA analysis. "Mexipedium xerophyticum" is known from a single location in Oaxaca, Mexico. Only seven plants were observed at the time of its discovery.

Its name is derived from the country of origin Mexico and the Latin " _la. pes" (“foot”), referring to the form of the lip. The specific epithet "xerophyticum" means "preferring dry conditions".

A small number of plants were removed for propagation to prevent rapacious growers from plundering their numbers. Plants are now available as propagules.

This is a lithophytic orchid, growing on cliffs, shielded from the sun, at an elevation of convert|320|m|ft|abbr=on|lk=off. But it grows as well on rocks or in the detritus in the crevasses. Its growth form is unusual in that it tends to spread by runners, offset from the parent plant by several centimeters. The silvery-green leaves are small, stiff and semi-erect. The tiny white-pink flowers show a shieldlike, pinkish staminode and a slipper-shaped lip. The curved petals are scythe-shaped. Inflorescences are multifloral and branched.

Allied genera include "Cypripedium", "Paphiopedilum", "Selenipedium" and "Phragmipedium".

The genus "Mexipedium" is considered to be a "Phragmipedium" for legal purposes, so it is on Appendix I of the Convention on International Trade in Endangered Species (CITES).

References

*cite journal |last=Albert |first=V. A. |authorlink= |coauthors=Chase, M. W. |year=1992 |month= |title=Mexipedium: A New Genus of Slipper Orchid (Cypripedioideae: Orchidaceae) |journal=Lindleyana |volume=7 |issue=3 |pages=172–176 |id= |url=http://mesoamericanorchids.de/literature/129-1059-172.pdf |accessdate= |quote=
*cite journal |last=Cox |first=A. V. |authorlink= |coauthors=Pridgeon, A. M.; Albert, V. A.; Chase, M. W. |year=1997 |month= |title=Phylogenetics of the slipper orchids (Cypripedioideae: Orchidaceae): nuclear rDNA ITS sequences |journal=Plant Systematics and Evolution |volume=208 |issue= |pages=197–223 |id= |url=http://folk.uio.no/victoraa/Cox_1997.pdf |accessdate= |quote=
*cite book |title=Genera Orchidacearum |volume=Vol. 1 |last=Pridgeon |first=A. M. |authorlink= |coauthors=Cribb, P. J.; Chase, M. W.; Rasmussen, F. N. |year=1999 |publisher=Oxford University Press |location=New York |isbn=0198505132 |pages= |url=