314 ORCHIDACEAE (ORCHIS FAMILY j 



basal, the lower ones usually withering before flowering-time ; scape smooth 

 below, densely pubescent above ; floral bracts longer than the ovaries, with dis- 

 tinct hyalins margins; raceme elongated, slender, 1-ranked, 8-15 cm. long; 

 perianth 8-10 mm. long, yellowish. (S. praecox Man. ed. 6, in part.)— Dry 

 soil along the coast, Mass. to Fla. and N. Mex. ; northw. through the Miss. 

 Valley to 111. and Kan.; rare. Aug., Sept. 



X S. intermedia Ames {S. gracilis x S. vernalis.) Resembling *S'. vernalis, 

 but slenderer throughout, with shorter narrowly elliptic-lanceolate leaves ; lip 

 nearly oblong, greenish with green callosities. — Dry fields, Easton, Mass. 

 (A A. Eaton). 



-*■*■ ++ Lip ohlong, smooth beneath. 



4. S. pra&cox (Walt.) Wats. & Coult. Scape 4-8 dm. high, slender, glabrous 

 below, slightly pubescent above ; roots clustered, fleshy; leaves linear, grass- 

 like, 1-2.5 dm. long, upper ones passing into acute sheathing hyaline-margined 

 bracts; perianth 6-9 mm. long ; flowers white, often veined with green, in more 

 or less one-sided racemes. — A southern spedes, extending along the Atlantic 

 coast from N. J. to Tex. Spring; Aug., Sept. at the North. 



* * Flowers apparently in several ranks. 



^ Lip not constricted^ or only rarely so. 



•4H- Lip quadrate, yellow (3Iaij-July). 



5. S. liicida (H. H. Eaton) Ames. Scape 7-20 cm. high : leaves oblong or 

 oblong-lanceolate, 9 cm. long, 1 cm. wide on the average, 3-5-nerved, contracted 

 into a sheathing base ; raceme slender, 2-7 cm. long ; perianth 5-7 mm. long ; 

 liD yellowish. (S. latifolia Torr. ; Neottia lucida H. H. Eat^n.) — Moist banks. 

 Me. to Ont. and Wise, s. to Va. May-July. 



•w. ^-f Lip ovate (Sept., Oct.). 



6. S. ovalis Lindl. Similar to the preceding in habit; perianth 4-5 mm. 

 long; lip few-nerved, membranaceous. (S. cernua, var. parviflora Chapm.) 

 — fn shady moist woods and on high wooded hills, rare, 111. and Mo. to Ga., Miss., 

 and Tex. Sept., Oct. 



++++++ Lip ovate-oblong. 



= Leaves mostly radical, lowermost longest. 



7. S. cirnua (L.) Richard. Plants 14-38 cm. high, from slender fleshy 

 roots, leafy below; leaves linear-lanceolate, variable, sometimes distinctly 

 petioled ; cauline bracts 4 or 5, usually closely appressed to the scape ; scape 

 pubescent above ; floral bracts exceeding the ovaries by about half the length of 

 the perianth ; flowers in two or three spiral or vertical ranks ; racemes 3-12 cm. 

 long ; perianth 7-10 mm. long; lip ovate-oblong, about as long as the sepals, 

 apical margin crisped or erose. — Bogs and wet land, Nfd. to Ga., Minn., and 

 Neb. Sept., Oct. — Very variable in size and foliage, often losing the root-leaves 

 at flowering time. Var. ocHROLEtcA (Rydb.) Ames. Growing in dry ground 

 and blooming somewiiat later, having greenish, cream-colored, or white flowers 

 and longer floral bracts. —Me. to S. Dak., s. to Ga. and N. Mex. Sept., Oct. 



= = Leaves extending up the stem. 



8. S. odDrata (Nutt.) Lindl. Plant 4-10.5 dm. high ; roots coarse, fleshy ; 

 leaves several, mostly basal, lanceolate, acute, about 12 cm. long, 2 cm. wide ; 

 perianth 8 mm. long, yellowish-white, often white, fragrant ; basal half of the 

 lip dilated, rhomboidal, tapering to the obtuse erose-margined apex, veined and 

 suffused with greenish-yellow, callosities prominent. — Swamps and wet ground. 

 Coast States, Va. to Tex. Sept. -Dec. 



+- •»- Lip constricted at the middle or near the apex. 



9. S. Romanzoffiana Cham. Plants 8-47 cm. tall, from roots 5-8 mm. thick, 

 leafy below and leafy-bracted above ; leaves varying from oblong-lanceolate to 

 linear ; scape glandular-pubescent above ; cauline bracts 2-3 ; raceme dense, 

 cylindrical, variable in length ; perianth yellowish or whitish, 6-12 mm. long ; 



