448 ORCHIDACE^E. (ORCHIS FAMILY.) 



5. SPIRANTIIES, Richard. LADIES' TRKSS.KS. 



Flower somewhat ringent ; tlic lateral sepals rather oblique at the base and 

 somewhat decurrcnt ou the ovary, covering the base of the lip ; the upper one 

 cohering with the petals ; all usually erect. Lip oblong, concave and embracing 

 the wingless column below, furnished with 2 callosities next the base, contracted 

 into a short claw below them or sessile, the spreading apex more or less dilated. 

 Column arching, obliquely short-stalked, the ovate stigma usually with a 

 short-pouted and at length 2-cleft beak. Anther attached to the btlck of the 

 column. Pollen-masses 2, club-shaped or obovate, fixed to the stigma by 

 a gland, deeply 2-cleft from the broader end (and in S. gracilis again 2-cleft) 

 into tender lamellae which are more or less inrolled when young, bearing 

 the powdery pollen-grains. Roots clustered-tuberous. Stems naked, or 

 leafy below. Flowers small, white, bent horizontal, in a close usually spi- 

 rally twisted spike (whence the name, from (rireipa, a coil or curl, and avOos, 



* Scape naked, barely bracted beloiv : leaves all at or near the ground, early disap- 

 pearing : flowers all one-sided. 



1. S. grdcilis, Bigelow. Scape very slender (8' -15' high), smooth; 

 spike slender, so twisted as to throw the flowers as they expand all into a single 

 (straightish or usually spiral) row ; bracts ovate, pointed, not longer than tho 

 pods, to which they are closely appressed ; lip spatulate-oblong, strongly wavy- 

 crisped at the rounded summit (not lobed), the callosities at the base conspicu- 

 ous, incurved; leaves varying from ovate to oblong-lanceolate, pctioled (l'-2 

 long), thin. (Also S. Beckii, Lindl., as to the Northern plant.) Hilly woods 

 and sandy plains: common. July, Aug. Perianth and lip J' 1' long, of a 

 delicate pearly texture : the calli at first oval, bearded at the base inside, at 

 length elongating and recurved. 



* * Scape or stem leafy towards the base : Jlowers not unilateral. 



2. S. latifolicl, Torr. in Lindl. Low (4' -9' high) ; leaves oblonq-lanceolate, 

 narrowed into a sheathing base ; spike oblong, rather dense, more or less twist- 

 ed ; bracts lanceolate, acutish, the lower as long as the flowers ; lip oblong, very 

 obtuse, wavy-crisped at the apex, 5 - 7-nerved below, and with 2 oblong adnate 

 callosities at the base. (S. plantaginea, Torr. in N. Y. FL, not of Lindl. S. 

 sestivalis, Oalces, cat.) Moist banks, N. New York, W. New England, and 

 northward ; not rare. June. Leaves chiefly towards the base of the stem, 

 2' -4' long and about ' wide, thickish; above are one or two small leaf-like 

 bracts. Flowers white with the lip yellowish, larger than in No. 1, much small- 

 er than in No. 3; the sepals minutely glandular-pubescent, as well as the axis 

 of the spike. 1 find nothing to distinguish it from S. lestivalis except that the 

 flowers are a trifle smaller, and the bracts less acute. 



3. S. Cerium, Richard. ttoot-li'nri'S UtMir-law-rolntc., tloiti/ated, those of tho 

 stem similar but smaller, passing into bracts ; spike dense, minutely pubescent ; 

 bracts ovate-lanceolate, pointed, as long as the flowers ; lip oblong, furnished 

 with two minute callosities at the base, constricti-d above the middle, rounded :it 

 the summit, wavy-crisped. Wet grassy places ; common. Aug. - Oer. Stem 



