AFRICAN

ORCHIDS

Peristylus Blume, Bijdr. Fl. Ned. Ind.: 404 (1825), nom. cons.
Heterotypic Synonyms:
Glossula Lindl., Bot. Reg. 10: t. 862 (1824).
Glossaspis Spreng., Syst. Veg. 3: 694 (1826).
Coeloglossum Lindl., Edwards's Bot. Reg. 20: t. 1701 (1834), nom. illeg.
Digomphotis Raf., Fl. Tellur. 2: 37 (1837).
Choeradoplectron Schauer, Nov. Actorum Acad. Caes. Leop.-Carol. Nat. Cur. 19(Suppl. 1): 436 (1843).
Lindblomia Fr., Bot. Not. 1843: 134 (1843).
Type species:
Peristylus grandis
Description:
Small to medium-sized terrestrial plants with small oblong to ellipsoid tubers. Leaves several, in a basal rosette, clustered in the middle of the stem or spirally arranged along stem, ovate to lanceolate or oblanceolate, sheathing at the base, thin-textured. Inflorescence terminal, sparsely to densely flowered; bracts lanceolate, as long as or shorter than the flowers. Flowers resupinate, small, spirally arranged, green or yellowish green, perianth persistent in fruit. Dorsal sepal and petals entire, free, connivent or slightly spreading, lateral sepals oblique. Labellum connate at base with margins of column, distally three -lobed or entire, larger than the sepals and petals, often clawed at the base, spurred at the base, ecallose or with a fleshy callus in front of the mouth of the spur; spur scrotiform to cylindric, shorter than to longer than the labellum, usually shorter than the ovary. Column short, conical, erect; anther bilocular, with adjacent loculi; lateral appendages sessile; pollinia two, shortly clavate, sectile; viscidia two, ovate to oblong; rostellum small, trilobed but with lateral lobe short and mid-lobe smaller than anther loculi; stigmatic arms two, remote, sessile, convex or depressed centrally, adnate to base of lip and lateral appendages. Ovary almost lacking a pedicel.
Etymology:
From the Greek peri, around, and stylos, a column, in allusion to the prominent column arms on each side of the column.
Habitat:
Distribution:
Mascarenes, Trop. & Subtrop. Asia to Mongolia and Pacific