ORCHIDACEAE. 69 



Corallorhiza maculata Raf. Whole plant reddish or sometimes green, 

 15-25 cm. tall; the spike many-flowered; sepals and petals 6-8 mm. long, 3- 

 nerved; spur grown to the ovary, 1-2 mm. long; lip ovate, white, mottled with 

 purple, 3-lobed, with prominent ridges; middle lobe obtuse or notched, the 

 lateral ones acute; column nearly as long as the petals. Deep woods in the 

 mountains. 



94. CEPHALANTHERA. 



Leafy plants with creeping rootstocks (saprophytic with leaves 

 reduced to scarious bracts in ours); flowers erect, white, in a 

 terminal raceme, very similar to Epipactis but with a longer and 

 more slender column; stigma beakless; anther short-stalked, 

 nearly or quite above the level of the stigma. 



Cephalanthera austinae (Gray) Heller. Whole plant waxy white, 30-50 

 cm. high, slender, erect; bracts linear-lanceolate, the lower with dilated sheaths; 

 flowers 3-20, nearly sessile; sepals and petals oblong-lanceolate, subequal; 

 lip short, saccate at base. In deep woods, rare. Blue Mountains; Rathdrum, 

 Idaho. 



95. CYTHEREA. 



Herbs with solid bulbs and coral-like roots; leaf at the base of 

 the stem solitary, petioled; scape low, 1 -flowered, sheathed by 

 two or three loose scales; flower large, terminal, showy, bracted; 

 sepals and petals similar, nearly equal; lip large, saccate or 

 swollen, 2-lobed below; column dilated, petal-like, bearing the 

 lid-like anther just below the summit; pollinia 2, waxy, each 

 2-parted. 



Cytherea bulbosa (L.) House. Calypso. Stems 10-15 cm. tall, enwrapped 

 toward the blade with 3^4 scarious sheaths, the uppermost prolonged into a 

 narrow bract; leaf solitary, radical, ovate, acute, 3-5 cm. long, on a petiole 

 about as long; sepals and petals ascending, lanceolate, purple, about 2 cm. 

 long; lip about as long, purple-lined, sac-like, two-lobed at the apex, with a 

 patch of yellowish hairs within; the apex of the slipper prolonged into two 

 tooth-like projections; column half as long as the petals. In mossy places in 

 coniferous woods. 



96. OPHRYS. 



Small herbs, with fibrous or sometimes rather fleshy roots; 

 leaves two, opposite, green, near the middle of the stem; flowers 

 in terminal racemes, spurless; sepals and petals nearly alike, 

 spreading or reflexed, free; anther without a lid, erect, jointed to 

 the column; pollinia 2, powdery. 



Lip 5 mm. long; ovary glabrous. 0. caurina. 



Lip 9 mm. long; ovary glandular. O. convallarioides. 



Ophrys caurina (Piper) Rydb. Stems slender, 15-30 cm. high, glabrous 

 below the leaves, the inflorescence glandular-puberulent; leaves sessile, ovate, 

 obtuse or acutish, glabrous, 3-5 cm. long; flowers small, the slender pedicels 

 longer than the bract or the ovary; sepals and petals lanceolate, spreading; 

 lip 4 mm. long, cuneate, obovate, with a slender tooth on each side near the 

 base; capsule ovoid, 5-6 mm. long. Deep woods in the mountains. 



