84 OECHIDACEAE. 



Stem leafy : column with a distinct foot : 



petals much narrower than the sepals. 



Scape sheathed only near the base : 



lip prominently lolled : anther upright. 15. Malaxis. 

 Scape sheathed to near the middle : lip 

 not prominently lobed : anther in- 

 clined. 16. LiPARIS. 

 Stem scaly : petals as broad as the sepals 

 or nearly so : column without a distinct 



foot. 17. COEALLOERHIZA. 



Leaf -blades plaited in the bud : column broadly 



winged above. 18. Limodordm. 



Flowering branch terminating a side branch of the 



plant. 19. Aplectrdm. 



1. CYPRIPEDIUM L. Caulescent herbs with fibrous roots. Leaves 

 several: blades plaited. Lip a horizontal sac. Stamens appressed, the free 

 tips directed forward. — Spr. — Ladies '-slipper. Moccasin-flower. 



Lip white : blade of the sterile stamen of a lanceolate type. 1. C. candidum. 



Lip yellow : blade of the sterile stamen of an ovate type, vary- 

 ing to oblong-ovate, triangular-ovate or ovate-lanceolate. 

 Sterile stamen with a triangular-ovate blade less than 1 



cm. long, obtuse : lip pale-yellow : flowers fragrant. 2. C. pcirviflortcm. 



Sterile stamen with an oblong-ovate or ovate-lanceolate blade 

 over 1 cm. long, acute : lip golden-yellow : flowers not 

 fragrant. 3. C. puhescens. 



1. C. candidum Muhl. Stem 1.5-3 dm. tall : leaf -blades narrowly ovate, oblong, 

 or elliptic, 6-13 cm. long: median sepal lanceolate to ovate-lanceolate, 2.5-3 cm. 

 long, greenish and purple-spotted: petals colored like the sepals but longer and 

 narrower: lip white, except for purple stripes within, 1.5-2 cm. long. — Occa- 

 sional, in swamps and low woods. 



2. C. parviflorum Salisb. Stem 3-5 dm. tall: leaf -blades elliptic to oval, 6-12 

 cm. long: sepals lanceolate to oblong-lanceolate, 2.5-3.5 cm. long: petals longer 

 and narrower than the sepals: lip 2-3 cm. long: capsule-body 2-2.5 cm. long. 

 — Eather rare, in moist thickets and woods. 



3. C. pubescens Willd. Stem 3-7 dm. tall: leaf -blades oblong or elliptic, 9-15 

 cm. long: sepals ovate-lanceolate or oblong-ovate: petals linear or attenuate, 

 longer than the sepals: lip 3.5-5 cm. long: capsule-body 3.5-4 cm. long. — Rather 

 common, in woods. 



2. FISSIPES Small. Acaulescent herbs with fibrous roots. Leaves mostly 

 2 : blades plaited. Lip a drooping sac. Stamens spreading, the free tips at 

 right angles to the column. 



1. F. acaulis (Ait.) Small. Leaves 1-3 dm. long; blades oblong, elliptic, or 

 oval: scape 1-5 dm. tall: sepals oblong to lanceolate, 3-4 cm. long: petals 

 narrower and longer than the sepals: lip pink or rarely white, obovoid, 4-6 cm. 

 long : capsule 3.5-4 cm. long. — Common, in woods. — Spr. — Moccasin-flower. 



3. GALEOECHIS Eydb. Acaulescent fleshy herbs with tuberous roots. 

 Flowers in a spike. Perianth ringent. Sepals and petals converging. Lip 

 broad, spurred. Stigmas hollow, the glands enclosed in a pouch. 



1. G. spectabilis (L.) Eydb. Leaves usually 2; blades oblong-elliptic, elliptic, 

 or oval, 7-14 cm. long: scape 1-3 dm. tall, the spike 3-12-flowered: perianth 

 violet-purple or white: lip 10-13 mm. long, slightly shorter than the spur: cap- 

 sules 2-2.5 cm. long. — Rather common, in woods and on shaded banks. — Spr. 

 — Showy-orchis. 



4. COELOGLOSSUM Hartman. Caulescent herbs with biennial branched 

 tubers, the stem leafy. Flowers relatively small, in a terminal spike. Peri- 



