ORCHIDACEAE. 109 



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 woods, not rare. 



137. 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. 



Leaves cordate; lip narrow, not dilated at tip. 0. cordata. 

 Leaves not cordate; lip dilated at tip. 



Lip sessile, not ciliate; ovary glabrous. 0. caurina. 



Lip clawed, ciliate; ovary glandular. O. convallarioides. 



Ophrys cordata (L.) R. Br. Stems slender, 10-20 cm. high; leaves ovate, 

 cordate, mucronate; flowers very small, greenish or brownish; lip narrowly 

 oblong, cleft to the middle, 4-5 mm. long. 



Common in mossy woods. 



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. 



In mossy woods, especially in the mountains. 



Ophrys convallarioides (Sw.) W, F. Wight. Similar to 0. caurina but 

 not so tall; leaves broad, oval or ovate, obtuse; inflorescence glandular; 

 flowers larger, the pedicels scarcely longer than the bracts or the ovary; lip 

 large, 9 mm. long, cuneate, retuse, with a short triangular tooth on each side 

 near the base. 



In moist woods. 



138. LIMNORCHIS. 



Leafy plants with thick fleshy roots or elongated conic un- 

 divided tubers, and small greenish or whitish flowers in a long 

 spike; sepals and petals free and spreading, several-nerved; lip 

 entire; beak of the stigma without appendages; anther-cells 

 nearly parallel, wholly adnate; gland naked; pollinia granular 

 with caudicula at the base. 



