ORCHIDACEM 23 



CORALLORHHIZA WISTERIANA 



Corallorrhiza Wisteriana, Conrad, Jour. Phil. Acad. 6 : 145 

 (1829). — Britton & Brown, Illus. Fl. 1 : 478. — Gray, Man- 

 ual, edi. 1,467 (1848). — Small, Fl. Se. U. S. 326.— Lind- 

 ley, Orch. Fl. 535. — Kearney, Bull. Torr. 21: 261 (1894). 

 — Britton, Manual 305. — Mohr, Fl. Life Ala. 458. 



Corallorrhiza odontorhiza. Chapman, Fl. S. U. S. ed. 1, 454 

 (1860) ; ed. 2, 454 (1884) ; ed. 3, 479 (1897) ; not Nuttall. 



"Aphylla; floribus pedicellatis, petalis exterioribus linearibus, 

 interioribus lanceolatis, labello subrotundo recurvo maculato, apice 

 emarginato, calcare perspieuo, adnato. 



" Description. — Scape purplish red, from 7 to 12 inches high, 

 generally flexuose near the top, furnished with from 3 to 4 deeply 

 striated sheaths of a paler colour. Flowers pedicelled, (12 to 16 

 on a scape) the three exterior petals dark red, Hnear, and slightly 

 spreading, the two interior ones broader, lanceolate, paler, and 

 spotted ; lip white, crystalline, and spotted with red, broad, some- 

 what rounded, recurved, and notched at the apex. Spur short, 

 conspicuous, adnate to the germen. Root somewhat bulbous, with 

 short branching coralloid radicles. Flowers the beginning of the 

 5th month." — Conrad, loc. cit. 



Plants 15-39 cm. high. Rhizome coralline, fleshy, brittle, 

 annulated, branched, each segment emitting a short tubercle or 

 branch. Scape tumid at base, sheathed, the sheaths 4, elongated, 

 2-7 cm. or more long, yellowish or madder-purple. Flowers in a 

 loose raceme. Lateral sepals linear-lanceolate, 6-7 mm. long, about 

 1 mm. wide, 3-nerved. tipper sepal similar to the laterals. Petals 

 5-6 mm. long, about 2 mm. wide, oblong, sub-acute, 3-nerved. 

 Labellum 5.5 mm. long, 4 mm. broad, 3-nerved, oval or subor- 

 bicular, retuse, short clawed, with 2 intra-marginal hnear callosi- 



