ORCHIS FAMILY 177 



Leaves unfolding before or with the flowers. 

 Lip flat; flowers racemed. 



Leaves cauline; column short; pollinia clavate. 



14. Malaxis. 

 Leaves basal; column elongated; poflinia globose. 



15. LiPARIS. 



Lip saccate; flower solitary. 16. Cytherea. 



Leaf 1, unfolding after the flowering time. 17. Aplectrum. 



Plants with coralloid roots, bulbless; leaves reduced to scales. 



18. Coraluirrhiza. 



1. CRIOSANTHES Raf. R.\m's-head. Ram's-head Ladies' Slipper. 



Perennial caulescent herbs, with rootstocks. Leaves sessile, alternate, 

 several-veined, plaited. Flowers solitary, terminal. Sepals 3, distinct, spread- 

 ing. Lateral petals narrow, spreading. Lips saccate, obtuse-conic, with the 

 margin incurved, forming a rounded opening. 



1. C. arietinum (R. Br.) House. Stem 2-3 dm. high, 1-flowered; leaves 3 or 

 4, elliptic or lanceolate, 5-10 cm. long; sepals lanceolate, 15-20 mm. long, brown- 

 ish; petals linear, greenish brown, about as long; lip about 1.5 cm. long, white, 

 veined and variegated wath red. Cypripedium arietinum R. Br. Cold damp 

 woods: Que. — N.Y. — Minn. — Sask. Boreal. My-Au. 



2. CYPRIPEDIUM L. Ladies' Slipper. 



Caulescent herbs, with rootstocks and fibrous roots. Leaves sessile, several- 

 nerved, plaited. Flowers solitary or several in a terminal raceme. Sepals 3, 

 the lateral two united under the lip. Lateral petals narrow, spreading. Lip 

 conspicuous, an inflated round sack, with romided opening, the margins incurv^ed. 

 Column declined, glabrous, bearing a fertile anther on each side, and a petalloid 

 sterile stamen above, arching over the style. Pollen pulpy or granular, without 

 tails or glands. Stigma terminal, broadest at the base. Capsule ribbed. 



Leaves alternate; flowers solitary, terraiaal, or also several singly in the axils of the 



upper leaves. 

 Sepals obovate to broadly obovate or oval, not longer than the lip; sterile stamen 

 elliptic-cordate. 1. C passerinum. 



Sepals lanceolate, attenuate, often longer than the lip. 



Lip white, purple-veined ; sterile stamen ovate or obovate. 2. C. montanum. 



Lip yellow; sterile stamen triangular, yellow and purple-spotted. 



Lip 2-2.5 cm. long, broader than deep; lower sepal narrower than the upper 

 one, exceeding the lip. 3. C. partiflorum. 



Lip 3-4 cm. long, deeper than broad; lower sepal fully as broad as the upper 

 one or broader, usually shorter than the lip. 4. C. veganum. 



Leaves 2, opposite or nearly so; flowers usually several in a contracted bracted spike. 



5. C. Knightae, 



1. C- passerinum Richards. Stem 1-2.5 dm. high, often retrorsel> villous; 

 leaves oval to lanceolate, 5-10 dm. long, more or less viscid-villous ; flowers 1-3; 

 sepals 1-1.5 cm. long, the lower one slightly 2-cleft; petals oblong, obtuse,_ about 

 1.5 cm. long; lip about 1.5 cm. long, obovate, white, with purple spots inside. 

 Pine woods: Ont.— Alta. — B.C. — Alaska — Mack, Boreal— MonL Je-Jl. 



2. C. montanum Dougl. Stem 3-5 dm. high, roughly glandular-puberu- 

 lent, 1-3-flowered; leaves oval to lanceolate, 7-15 cm. long, roughly glandular- 

 puberulent; sepals linear-lanceolate, 4-5 cm. long, greenish brown; petals nar- 

 rowdy linear-lanceolate; lip 2.5-3 cm. long. Open woods: B.C. — -Calif. — -Wyo. 

 — -Sask. Siibmont. Je-JL 



3. C. parviflonim Salisb. Stem 2-6 dm. high, leafy, glandular-puberulent, 

 usually 1-flowered; leaves oval to broadly lanceolate, often acuminate, 5-12 cm. 

 long, puberulent; upper sepal lanceolate, acuminate, about 3 cm. long and 1 cm. 

 wide; petals narrowly linear-lanceolate, longer than the sepals. Woods: Ne-vv-f. 

 —Ga.— Colo.— B.C. Plain— Siibmont. 'My-Jl. 



4. C. veganum Cockerell. Stem about 3 dm. high, leafy, puberulent, 1- 

 flowered; leaves broadly lanceolate, acuminate, 8-13 cm. long; sepals lanceolate, 

 3-4.5 cm. long; petals hnear-lanceolate, 4.5-5.5 cm. long. Canons: X.M.— Colo. 

 Submont. Je-JL 



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