54 OECHIDACEAE. 



Spike lax. Perianth whitish. Median sepal and petals coherent: lateral 

 sepals erect. Lip with a large body, completely involute, about the long 

 column and a short nearly erect tip, the basal callosities commonly minute or 

 obscure. Stigma-beak not forked. 



1. B. cranichoides (Griseb.) Small. Stems 1-2.5 dm. tall: blades of the basal 

 leaves ovate, somewhat oblique, 2-3 cm. long: lateral sepals lanceolate, mostly 

 4-5 mm. long, acuminate: petals linear, acute: lip 4-5.5 mm. long, the body 

 cuneate, the tip rhombic, about as broad as long, the callosities minute or 

 obscure. [B. Storeri (Chapm.) Small.] — Hammocks. — (Cuba.) 



10. CRANICHIS Sw. Caulescent succulent herbs with coarse roots. 

 Leaves various, the lower cauline with mostly long-petioled dilated blades, the 

 upper ones reduced to partially sheathing scales. Flowers in a terminal spike. 

 Perianth white or whitish. Lateral sepals broad, slightly inequilateral. Petals 

 narrow, much smaller than the sepals. Lip longer than the petals, concave. 



1. C. muscosa Sw. Plants 1-3 dm. tall, the stem scaly: leaf -blades oblong- 

 elliptic, oval or ovate, 2.5-7 cm. long: lateral sepals ovate, 3-3.5 mm. long: 

 petals narrowly elliptic to cuneate-spatulate, 2.5-3 mm. long: lip oblong or 

 nearly so, about 3 mm. long, sessile. — Hammocks. — (Bah., Cuba, Ant.) 



11. PBESCOTTIA Lindl. Caulescent herbs with stout roots. Leaves 

 various, the basal ones with broad blades, the cauline ones reduced to sheath- 

 ing scales. Flowers in a terminal spike. Perianth white, pink, or greenish. 

 Lateral sepals broad, nearly equilateral. Petals much smaller than the sepals. 

 Lip very broad, the blade auricled at the base. 



1. P. oligantha (Sw.) Lindl. Plants 2-4 dm. tali, the stem with narrow 

 scales : blades of the lower leaves ovate or oblong to oval, 2-6 em. long : lateral 

 sepals ovate, about 1.5 mm. long: petals ovate to oblong-ovate, about 1 mm. 

 long: lip 1.2-1.5 mm. long, the blade suborbieular, with minute auricles at the 

 base. — Hammocks. — (Bah., Cuba, Ant.) 



12. PONTHIEVA E. Br. Caulescent herbs with scape -like stems from 

 clustered roots. Leaves various, the lower cauline with dilated blades, the 

 upper mere scales. Eaceme lax. Perianth greenish. Lateral sepals ovate, 

 slightly inequilateral. Petals drooping, the blades very inequilateral, slender- 

 clawed. Lip relatively small, concave, beaked, short-clawed. 



Petal-blades about as wide as long : anther linear. 1. P. racemosa. 



Petal-blades decidedly longer than wide : anther oblong. 2. P. Brittonae. 



1. P. racemosa (Walt.) C. Mohr. Plants 2-5 dm. tall: blades of the lower caul- 

 ine leaves oblong to ovate-oval, 4-13 cm. long or more: lateral sepals ovate, 

 5-5.5 mm. long, acutish: petals about as long as the sepals, the claw shorter 

 than the blade: lip 4-4.5 mm. long. — Hammocks. — (Cuba, Ant.) 



2. P. Brittonae O. Ames. Plants 1-4 dm. tall: blades of the lower cauline 

 leaves oblong, ovate, or obovate, 3-11 cm. long: lateral sepals ovate, 4-4.5 

 mm. long, acute: petals about as long as the sepals: lij) 3-3.5 mm. long. — 

 Pinelands. — (Bah.) 



13. PHYSITRUS L. C. Rich. Caulescent succulent herbs, the stems leafy. 

 Leaves with wide blades. Spike compact. Perianth whitish or greenish. 

 Lateral sepals relatively broad, decurrent, together with the base of the lip, 

 as a sac partially adnate to the hypanthium. Petals mostly smaller than the 

 sepals. Lip 3-lobed. the terminal lobe quite as long as the body of the lateral 

 lobes, with a reflexed tip, the broad claw-like base forming part of the spur. 



