ORCHIDACBAE (ORCHIS FAMILY) 318 



toothed at the dilated apex ; stigma protuberant, turned down. — Bogs Nfd to 

 Ont. and Minn., Pa., and mts. of S. C. May, June. ' 



7. SERApIAS L. 



Flowers in a loose or somewhat dense bracteose raceme. Sepals ovate- 

 lanceolate, strongly keeled. Petals sliorter, ovate, acute. Lip strongly saccate 

 at base, the apical part broadly cordate, acute, with a raised acallus inl^lie middle 

 and two inconspicuous nipple-like protuberances on each side near the point of 

 union with the sac. Column broad at the top, the basal part narrower ; anther 

 sessile, behind the broad truncate stigma on a slender-jointed bas^ • itollen 

 farinaceous, becoming attached to the gland capping the small 

 rounded beak of the stigma. — Stem leafy. (Named for the 

 Egyptian deity Serapis.) Epipactis of auth., not Boehm. 



L S. Helleborine L, Plants 25-60 cm. high; leaves clasp- /35iS\^^ 

 ing the stem, conspicuously nerved, broadly ovate to lanceolate, 

 acute; perianth about 8 mm. long, green suffused witli madder- 

 purple; lip similarly colored, but darker within, the apical por- 

 tion as if jointed with the sac, bituberculate at base, (Epipactis ^^^- S. Helleborine 

 Crantz ; E. latifoUa All. ; E. viridiflora Reichenb.) — Rare and ^ ^^3- 



local, Que. and Ont. to Mass., N. Y., and Pa. —Probably introduced from Europe 

 in early times on account of supposed medicinal value. July-Aug. CEu ) 

 Fig. 625. j ^ k j 



8. SPIRANTHES Richard. Ladies' Tresses 



Perianth somewhat ringent. Lateral sepals lanceolate, the upper sepal united 

 with the oblong petals. Lip short-stalked, with a callus protuberant within on 

 each side of the base, the somewhat dilated summit spreading or recurved, ciisped, 

 wavy, or rarely toothed or lobed. Column short, bearing the ovate stiiana on 

 the front, and the sessile or short-stalked (mostly acute or pointed) 2-celled 

 erect anther on the back ; pollen-masses 2 (1 in each cell), narrowly obovoid, 

 each 2-cleft and split into thin and tender plates of granular pollen united by 

 elastic filaments, coherent to the narrow viscid gland, which is set in the slender 

 or tapering thin beak which terminates the column. After the removal of the 

 gland, the beak is left as a 2-toothed or forked tip. — Roots clustered. 8tem 

 bracted above, leaf-bearing below or at the base. Flowers small, white, yellow- 

 ish- or greenish-white in a more or less spirally twisted raceme (whenre the 

 name, from a-rreipa, a coil or curl, and dpdos, a flower). Gyrostachys Pers. ; 

 Ibidium Salisb. 



* Flowers in a single rank, often secund. 



-«- Leaves fugacious, ovate or elliptic. 



•M- Boot solitary ; lip white. 



1. S. BIckii Lindl. Plants with a solitary subcylindrical or spindle-shaped 

 root, and bearing a small slender raceme of white flowers; perianth 2-3 mm. 

 long. {S. simplex Gray.) — Dry soil, near the coast, Mass. to 

 Fla. and Tex., inland in the Miss. Valley to Ky. and Ark. Aug., 

 Sept. Fig. 626. — Root ot preceding year often persistent. 



++ ++ Boots fasciculate ; Up green. 



2. S. gracilis (Bigel.) Beck. Plants from a cluster of thickened 

 roots, slender, 2-8 dm. high, bearing a slender many-flowered 

 mostly one-sided or spirally twisted raceme ; pt-rianth about 5 nun. 

 long ; lip greenish, with a white crisped margin. — Dry soil, N. S. 

 to L. Winnipeg and Tex. July-Sept. 

 •«- ••- Leaves persistent, ohlong-lanceolate to linear-lanceolate. 

 ++ Lip ovate to ovate-oblong, pubescent beneath. 

 3. S. vernalis Engelm. & Gray. Plant 15-56 cm. high ; roots elongated, 

 fusiform ; leaves 7-15 cm. long, 8^9 mm. wide, tapering to both ends, mostly 



