Orchidaceae. 381 
postico similia vel angustiora saepius linearia. Labellum superum, 
cum pede columnae articulatum, basi contractum incumbens, dein 
erectum, distinete trilobatum. Columna brevis nune brevissima, lata, 
exalata, basi in pedem producta; elinandrium breve, truncatum. 
Anthera terminalis, opercularis, incumbens, valde convexa, unilocu- 
laris vel imperfecte bilocularis; pollinia 4, cerea, late ovata, per 
paria sibimet arcte applieita vel in 2 connata, inappendiculata, anthera 
dehiscente stipiti brevi vel glandulae affixa. Capsula oblonga vel 
fusiformis. — Herbae epiphyticae, per regiones tropicas utriusque 
orbis dispersae. Caules foliati, breves, basi vaginati, demum in 
pseudobulbos saepe parvos incrassati. Folia pauca, disticha, multi- 
nervia et non plicata, basi in vaginas contract. Pedunculus ter- 
minalis, supra folium paueivaginatus; racemus simplex, vel racemi 
plures, breves, secus rhachin communem dissiti. Flores saepissime 
parvi et numerosi. Bracteae parvae. 
Conspectus specierum, 
I. Folia saepissime plura, oblongo-ligulata; spicae plures, usque 15; sepala 
lateralia valde obliqua, mento valde prominente, obtuso. 
99. P. luteola Hook. . 
II. Folia saepius 2, linearia; spicae 1— 5; sepala lateralia leviter obliqna, 
mento paulo prominente, rotundato . . . . 100. P. foliosa Rehb.f. 
99. Polystachya luteola (Sw.) Hook. 2—5 dm. alta; caule 
2—4 mm. crasso, inferne 2--5-foliato; foliis erectis vel erecto-patulis, 
oblongo-ligulatis, acutiusculis, 7—18 em. longis, 1--3 cm. latis; spieis 
paucis vel usque ad 12—15, patulis vel erecto-patulis, 10—-15-floris; 
sepalis carnosulis, dorsali ovato, 21/, mm. longo, 1®/, mm. lato, late- 
ralibus latissime ovato-trianguiaribus, valde obliquis, 31/, mm. longis, 
basi 31/,—4 mm. latis, mento valde prominente, obtuso; petalis 
acutis, 21/, mm. longis, ®/, mm. latis; labello carnosulo, ambitu anguste 
obovato, 3—3!/, mm. longo, 2—2!/, mm. lato, lobis lateralibus parvis, 
angustis, obtusis, lobo mediano multo majore; capsula 7—12 mm. 
longa, 2!/,—4 mm. crassa. 
Polystachya luteola Hook. Exot. Fl. II (1825) tab. 103; A. Rich. 
in Sagra, Fl. Cub. Faner. X1 p. 247 (var. angustifoia A. Rich.); 
Griseb. Flor. p. 628, Cat. p. 265; Sauv. Fl. Cub. p. 230; Eggers, 
Fl. St.-Oroix et Virg. Isl. n. 970; Rehb.f. in Ber. Deutsch. Bot. Ges. 
III p. 276; Cogn. in Mart. Fl. Bras. III. 4 p. 312; Duss Fl. Antill. 
Frang. p. 5 97; Urb. Fl. Portor. p. 170. 
Dendrobium polystachyon Sw. in Act. Holm. 1800 p. 247, in 
Schrad. N. Journ. Bot. I p. 95, Flor. III p. 1978 et 1998. 
Oranichis luteola Sw. Flor. III (1806) 'p. 1433. 
