184 ORCHIDACEAE 



1. A. spicatum (Walt.) B.S.P. Scape glabrous, 3-6 dm. high, with a few 

 scales; leaf -blade ovate or elliptic, or obovate, 1-1.5 cm. long; flowers dull yellow- 

 ish brown, streaked with purple, fully 2 cm. long; lip shorter than the petals, 

 obtuse, somewhat 3-lobed; capsule oblong-ovoid, 2 cm. long. A. hyemale 

 Nutt. Woods: Ont. Ga. Mo. Sask. Boreal. My-Je. 



18. CORALLORRHIZA R. Br. CORAL-ROOT. 



Leafless saprophytic herbs, with coralloid roots. Stems scaly, colored. Flow- 

 ers in terminal spikes. Sepals nearly equal, the lateral ones united with the 

 foot of the column, and often forming a short spur, partly or wholly adnate to 

 the top of the ovary. Lateral petals similar to the sepals. Lip broad, spread- 

 ing, adnate to the base of the 2-edged or 2-winged column. Fertile anther soli- 

 tary, terminal, lid-like. Pollinia 4, waxy, free. 



Spur small, adnate to the ovary. 



Lip entire, ovate, sinuate; whole plant yellow. 1. C. ochroleuca. 

 Lip with 2 lobes or teeth below the middle; plant brownish, rarely yellowish. 

 Column about half as long as the petals; sepals erect. 



Lip unspotted; teeth or lobes small; spur very small. 2. C. Corallorrhiza. 



Lip spotted; lobes prominent; spur manifest. 3. C. multiflora. 



Column almost equalling the petals; sepals reflexed. 4. C. Mertensiana. 

 Spur lacking. 



Petals and sepals 12-14 mm. long, elliptic. 5. C. striata. 



Petals and sepals 7-8 mm. long, oblong. 6. C. Vreelandii. 



1. C. ochroleuca Rydb. Stem 2-4 dm. high, not bulbous-thickened at the 

 base; raceme 10-15-flowered; flowers 15-20 mm. long, light yellow, unspotted; 

 petals and sepals 7-8 mm. long, oblong-lanceolate, acute, with prominent mid- 

 vein. Woods: w Neb. Colo. Utah. Submont. Je-Jl. 



2. C. Corallorrhiza (L.) Karst. Stem glabrous, 1-3 dm. high, usually 

 yellowish; racemes 3-7 cm. loijg, 3-12-flowered; flowers greenish yellow or green- 

 ish brown, about 1 cm. long; lip oblong, yellowish or whitish; spur a sack or 

 small protuberance; capsule 8-12 mm. long. C. innata R. Br. Woods: N.S. 

 Ga. Colo. Alaska; Eu. Submont. Mont. My-Je. 



3. C. multiflora Nutt. Stem 2-5 dm. high, purplish, with many scales; 

 racemes 10-30-fl owered ; flowers 12-18 mm. long, brownish purple; lip white, 

 spotted and lined with purple, oval in outline, deeply 3-lobed, crenulate, the 

 middle lobe longer; spur about 2 mm. long; capsule 15-20 mm. long. Woods: 

 N.S. Fla. Calif. Alaska. Plain Mont. Je-Au. 



4. C. Mertensiana Bong. Scape 2-4 dm. high, glabrous, purple; raceme 

 10-20-flowered; flowers purplish; lip entire, broadly oblong, narrowed at the 

 base, thin, concave; spur about 2 mm. long, the lower half free from the ovary; 

 capsule fully 2 cm. long. Woods: Alaska Mont. Ida. Calif. Mont. Je- 

 Au. 



5. C. striata Lindl. Stem stout, 2-5 dm. high, purple; raceme 10-25- 

 flowered; flowers purple with dark veins; Up oval or obovate, entire, undulate, 

 about as long as the petals; column half as long as the petals; capsule ellipsoid, 

 reflexed, 15-20 mm. long. Woods: Ont. N.Y. Mich. Wyo. Calif. B.C. 

 Submont. My-Jl. 



6. C. Vreelandii Rydb. Stem rather stout, 2-4 dm. high, dark purplish 

 brown; flowers 6-15, about 15 mm. long, in fruit drooping; sepals with 3 purple 

 stripes; petals slightly broader and with 4 stripes; lip ovate, entire. Wet woods: 

 Colo. N.M. Mont. Subalp. Je. 



