318 ORCHIDACEAE (ORCHIS FAMILY) 



13. MICROSTYLIS (Nutt.) Eaton. ADDER'S MOUTH 



Sepals oblong, spreading. Petals filiform or linear, spreading. Lip auricled 

 or ovate at base, narrowing toward the summit, entire or nearly so. Column 

 very small, terete, with 2 teeth or auricles at the summit and the 

 erect anther between. them ; pollen-masses 4, in one row (2 in each 

 anther-cell), cohering in pairs, waxy, without stalks, filaments, or 

 gland. Low herbs from solid bulbs producing simple stems which 

 bear a single leaf and a raceme of numerous minute greenish 

 flowers. (Name composed of /z,i/c/>6s, small, and o-ruX^s, a column 

 or style.) ACHROANTHES Raf. (without description). 

 634. M. mono- 1- M. monophyllos (L.) Lindl. Scape slender, 10-15 cm. high, 

 phyllos x 3%. with a sheathing, ovate-elliptical leaf above base ; 

 raceme spiked, long and slender, about 7 mm. in 

 diameter ; pedicels nearly equal to the ovaries in length ; lip 

 roundish at base, terminating in a long point. In damp shady 

 woods or swamps, occasional from Que. to Man., s. to Pa., Ind., 

 and Minn., rare southw. June, July. (Eurasia.) FIG. 634. 



2. M. unifblia (Michx.) BSP. Plant 7-22 cm. high; leaf 

 near the middle, ovate, clasping ; raceme short, 8-20 mm. in 

 diameter; pedicels much longer than the ovaries; lip truncate, 

 3-lobed at the summit, the middle lobe small. (M. ophioglos- 

 soides Eaton.) Occasional in bogs and woods, Nfd. to Man., and 635. M. unifolia 

 southw. July, Aug. FIG. 635. xsy 3 . 



14. LIPARIS Richard. TWAYBLADE 



Sepals oblong-lanceolate. Petals linear or filiform. Lip entire. Column 

 2-3 mm. long, curved, stout at base, with narrow wings above ; anther termi- 

 nal, operculate ; pollen-masses 4 (2 in each anther-cell), slightly united in pairs, 

 without stalks, filaments, or gland. Low herbs, with solid 

 bulbs, producing two root-leaves and a low scape which bears 

 a few-flowered raceme. (Name from \urap6s, fat or shining, 

 in allusion to the smooth or unctuous leaves.) 



1. L. Iiliif61ia (L.) Richard. Plants 10-17 cm. high; leaves 

 elliptical or ovate, acute or obtuse, glossy ; scape angled ; 

 x 2! flowers 5-15 ; sepals oblong-lanceolate, similar ; petals pendent, 



' 3 ' madder-purple ; lip wedge-obovate, translucent, madder-purple ; 



column with 2 gland-like tubercles on the inner face at base. Woods, N. H. 

 and Mass, to Minn., Mo., and Ala. June, July. FIG. 636. 



2. L. Loeselii (L.) Richard. Plants 8-22 cm. high ; leaves elliptic-lanceolate 

 or oblong, keeled ; lip obovate or oblong, 5 mm. long, yellowish-green ; column 

 about 2 mm. long. Swamps, damp fields, and moist thickets, rather local, be- 

 coming rare southw. June, July. (Eu.) 



15. CALYPSO Salisb. 



Sepals and petals similar, ascending, spreading, oblong-lanceolate, acute, 

 magenta-crimson, rarely white. Lip larger than the rest of the flower, saccate, 

 with three longitudinal rows of yellow (or white) glass-like hairs in front and 

 with a translucent apron-like appendage (formed by the overlapping of the lip) 

 spotted with madder-purple, the sac (bearing two conspicuous horns at its base) 

 whitish, with irregular purple-madder markings. Column winged, having the 

 operculate anther just below the apex ; pollen-masses waxy, 2, each 2-parted, 

 all sessile on a square gland. Leaf solitary. Scape one-flowered. (Named 

 for the goddess Calypso.') 



1. C. bulbbsa (L.) Oakes. Plant 6-18 cm. high ; leaf oval or ovate, veiny, 

 its margin wavy, the petiole triangular ; scape smooth,' with membranaceous 

 sheathing bracts ; both leaf and scape produced separately from the summit of 

 a rounded or elongate'd corm; pedicel of the flower subtended by a petaloid 



