50 Flora of the Palouse Region 



78. USTERA. 



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. 



L. caurina Piper. 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, Thatuna Hills. 



79. GOODYERA. 



Herbs with bracted erect scapes and thick fleshy-fibrous roots: 

 leaves basal, tufted, often blotched with white: flowers in bracted 

 spikes: lateral sepals free, the upper ones united with the petals 

 into a hood-like structure (galea): lip sessile, entire, roundish, 

 ovate, concave or saccate, without protuberances, its apex reflexed: 

 anther without a lid, erect or incumbent, attached to the column 

 by a short stalk; pollinia composed of angular grains, one in each 

 sac, attached to a small disk which coheres with the top of the 

 stigma. 



G. menziesii Lindl. Scape 15-30 cm. tall, erect, glandular-puberulent, 

 bearing several short bracts: leaves ovate, acute, with a broken white stripe 

 down the midvein, 3-5 cm. long, short-petioled: spike bracteate, densely 

 many-flowered, 6-10 cm. long, one-sided: perianth glandular-hairy, white, 

 the sepals and petals 6-8 mm. long, about as long as the glandular ovary: 

 lip concave, erect, the tip recurved, obtuse: column short, straight. Deep 

 woods, Thatuna Hills. 



80. CALYPSO. 



Herbs with solid bulbs and coral-like roots: scape low, 1 -flow- 

 ered, sheathed by two or three loose scales: leaf at the base of the 

 stem, solitary, petioled: 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 two, waxy, each 2-parted. 



C. borealis Salisb. 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 yellow- 

 ish hairs within; the apex of the slipper prolonged into two tooth-like pro- 

 jections: column half as long as the petals, Deep woods, Cedar Mountain, 

 rare, 



