ORCHIDACEAE. 



Vol. I. 



5. Corallorrhiza ochroleuca Rydb. Yel- 

 low Coral-root. Fig. 1417. 



Corallorrhiza ochroleuca Rydb. Bull. Torr. Club 31 : 

 402. 1904. 



Scape stout, yellow, 7'-i6' high. Raceme 3-5' 

 long, 10-15-flowered; flowers yellow; sepals and 

 petals oblong to oblong-lanceolate, s"-6" long, 

 not striped; lip yellow, shorter than the petals, 

 ovate, entire, rounded at the base, obtuse; spur 

 small, adnate to the ovary; wings of the column 



In canons, western Nebraska and Colorado. June- 

 July. 



6. Corallorrhiza striata Lindl. Striped Coral- 

 root. Fig. 1418. 



C. striata Lindl. Gen. & Sp. Orch. 534. 1840. 



Corallorrhiza Macraei A. Gray, Man. Ed. 2, 453. 1856. 



Scape stout, purplish, 8'-2o' high. Raceme 2'-6' 

 long, 10-25-flowered. Flowers dark purple; sepals 

 and petals narrowly elliptic, striped with deeper 

 purple lines, 6" -7" long, spreading; lip oval or 

 obovate, striate-veined, entire or a little undulate, 

 somewhat narrowed at the base, about as long as 

 the petals, bearing two short lamellae; spur none, 

 but the perianth has a gibbous saccate base; cap- 

 sule ellipsoid, reflexed, 8"-io" long. 



In woods, Ontario and northern New York to Michi- 

 gan, Oregon and California. July. 



28. HEXALECTRIS Raf. Neog. 4. 1825. 



Scapose herbs, from thick scaly rootstocks and fleshy coralloid roots, the leaves reduced 

 to purplish scales, sheathing the scape. Flowers bracted in a loose terminal raceme. Peri- 

 anth not gibbous or spurred at the base, the petals and sepals similar, nerved, spreading. 

 Lip obovate, with several crested ridges down the middle, somewhat 3-lobed, the middle 

 lobe a little concave. Column free, thick, slightly incurved. Pollinia 8, united in a cluster. 

 Capsule ellipsoid, the fruiting pedicels thick. [Greek, signifying six crests.] 



Two known species, the following typical one and another in Mexico. 



