272 ORCHIDE& (Rolfe), | Pterygodium. 
reflexed undivided variously shaped limb above, usually smaller 
than the petals, produced above the junction with the column into 
shaped or sometimes divided into two more or less distant cushion- 
prominent ribs. 
Terrestrial herbs, with small “nese sessile tubers ; leaves cauline, lanceolate 
or oblong, usually suberect, sometimes few ; flowers in dense or sometimes lax 
spikes, generally yellow or white ; tracts ficediets or ovate-lanceolate. 
Distris. Species 11, all ite hetgieal South African, 
Schlechter has extended this genus so as to include the whole of Corycium 
then 
Sw., which he divides into three sections, Euptery, godium, cia ate and 
Eleuterocorycium, the latter containing four species, one of which included in 
Corycium by Bolus, sr the three others are better placed. With. this alteration 
Pterygodium becomes a natural and well-defined genus, 
Leaves in a radical or niebaiial more or less spreading 
uft : 
aie nt under $ in. broad | aces niga Kate 
pendage of tip | long and n ¢ 1) alatum. 
Wises over 4 in. flag — sallow appendage of 
lip short and broad . -- (2) caffrum., 
Leaves cauline or few and ne 
6 to 15 in. high, moderately stout, usually 
everal- to many-flowe 
Petals usually 6 lin. or mor. e lon 
Appendage of “ip _tiangular-anceclte or ovate- 
—* 
eaves 8 ; secre of lip usually entire ... (3) acutifolium. 
Leaves 2; appendage of lip usually serrate ... (4) catholicum. 
omeutl . ap cruciform, about 5 lin. long ... (5) eruciferum. 
Petals 34 to 
Appendage of ipa 3 shed, a hn long) :-- (6) hastatum. 
n. lon 
prema le ne ow ; ip ‘oblong, denticulate 
at t tis . (7) Newdigate. 
Flowers aie and green ; ae very jee 
emarginate or bilobed at the apex a4 8) leucanthum. 
Appendage of lip 1} lin. long .., eee Y —— 
Stem sd to 6 in. high, very slender, one- to lees 
Stem # 3- to ‘Lisiinn, 23 in. long; sepals i. - (10) pentherianum. 
Stem 1- to 2-leaved ; lower leaves 2 to . long ; 
dorsal sepal shorter and sat ill all the 
lateral = ae Mn -- (11) platypetalum. 
1. P. alatum (Sw. in Vet. Acad. Handl. Stockh. 1800, 218) | 
plant 3-6 in. high, turning black in drying ; stem moderately stout’ 
