57 2 



ORCHIDACEAE. 



Vol. I. 



i. Liparis liliifolia (L.) L. C. Rich. 

 Large Twayblade. Fig. 1408. 



Ophrys liliifolia L. Sp. PI. 946. 1753. 



Liparis liliifolia L. C. Rich. ; Lindl. Bot. Reg. pi. 



88s. 1825. v 



Leptorchis liliifolia Kuntze, Rev. Gen. PI. 671 



1891. 



Scape 4-10' high, 5-10-striate. Leaves ovate 

 or oval, 2%5' long, 1-2$' wide, obtuse, keeled 

 below, the sheaths large and loose. Raceme 

 sometimes 6' long; flowers numerous, showy; 

 sepals and petals somewhat reflexed; petals 

 very narrow or thread-like; lip erect, large, 

 S"-6" long, about as long as the petals, wedges 

 obovate; column ij" long, incurved, dilated at 

 the summit; pedicels slender, ascending or 

 spreading, 4"-8" long; capsule somewhat club- 

 shaped, abous 6" long, the pedicels thickened 

 in fruit. 



In moist woods and thickets, Maine to Minne- 

 sota, Georgia and Missouri. Ascends to 3000 ft, 

 in Virginia. May-July. 



2. Liparis Loeselii (L.) L. C. Rich. Fen 

 Orchis. Loesel's Twayblade. Fig. 1409. 



Ophrys Loeselii L. Sp. PI. 947. 1753. 



Liparis Loeselii L. C. Rich. Mem. Mus. Paris 4 : 60. 

 1817. 



Leptorchis Loeselii MacM. Met. Minn. 173. 1892. 



Scape 2'-8' high, strongly 5-7-ribbed. Leaves 

 elliptic or elliptic-lanceolate, 2'-6' long, ¥-2' wide, 

 obtuse; raceme few-flowered; flowers greenish, 

 smaller than those of the preceding species, 2"-$" 

 long; sepals narrowly lanceolate, spreading; petals 

 linear, somewhat reflexed; lip obovate, pointed, 

 rather shorter than the petals and sepals, its tip in- 

 curved; column half as long as the lip or less; cap- 

 sule about 5" long, wing-angled, on a thickened 

 pedicel. 



In wet thickets and on springy banks, Nova Scotia to 

 Saskatchewan, south to Alabama and Missouri. Also in 

 Europe. May-July. 



24. CYTHEREA Salisb. Trans. Hort. Soc. 1 : 301. 1812. 



[Calypso Salisb. Par. Lond. pi. 89. 1807. Not Thouars. 1805.] 



Bog herb, with a solid bulb and coralloid roots, the low i-flowered scape sheathed by 2 

 or 3 loose scales and a solitary petioled leaf at the base. Flower large, showy, terminal, 

 bracted. Sepals and petals similar, nearly equal. Lip large, saccate or swollen, 2-parted 

 below. Column dilated, petal-like, bearing the lid-like anther just below the summit. Pol- 

 linia 2, waxy, each 2-parted, without caudicles, sessile on a thick gland, the stigma at the 

 base. [Surname of Venus.] 



A monotypic species of the cooler portions of the north temperate zone. 



