324 Class XX. Order I. 



roundish, acute ; spike few flowered ; lip oblong, ob- 

 tusely two Jobed ; germ roundish ; root fibrous. 



Syn. OPHRTS COR DAT A. MX. ? 



LlSTERA CONVALLARI01DES. Nutt. 



Root fibrous. Steal erect, furrowed, furnished half way with 

 two opposite, sessile, broad-heart shaped leaves. Flowers in a 

 short spike, the three outer petals green, the two inner ones 

 purplish. Lip bifid, with two appendicles at base. In woods 

 and near mountain brooks remote from the sea coast, particu- 

 larly on the sides of the White mountains ; three or four inches 

 high. July. Perennial. 



334. MALAXIS. 

 MALAXIS UNIFOLIA. MX. One leaved Malaxis. 



Leaf solitary, ovate, clasping ; scape five angled ; 

 lip cleft at the tip. 



Syn. MALAXIS OPHIOGLOSSOIDES. Willd. 



A small plant with a single clasping leaf. Flowers in a ter- 

 minal raceme with short, ovate, acuminate bractes. Peduncles 

 about half an inch long, many of them abortive. Germ obovate, 

 furrowed. Petals five, the two upper ones half heart shaped, 

 the two inner ones filiform, the lowest deflexed and revolute at 

 the edges. Lip erect, heart shaped, cleft at top with a tooth in 

 its division. Column or style minute, extended in front of the 

 lip. Woods, rare. June. Perennial. 



MALAXIS LILIIFOLIA. W-tlld. Two leaved Malaxis. 



Leaves two, ovate-lanceolate ; scape triangular ; in- 

 ner petals filiform, reflexed ; lip concave, obovate, 

 acute at tip 



Leaves oval or lanceolate, radical. Scape about six inches 

 high. Flowers in a short raceme ; the three outer petals ivhite. 

 linear, acute ; the two inner ones capillary, j'ellowish, retiexed. 

 Lip wedge shaped or obovate, mucronate, larger than the pe- 

 tals. Woods, Cambridge. Perennial. 



335. ARETHUSA. 



Subgenus ARETHUSA. hip and petals adnate to the style; 

 pollen angular. 



