36 TRIANDRIA.— MONOGYNIA. 



pubescent ; leaves long-lanceolate, subpetiolate ; 

 throat bearded. 

 HAB. Shady woods. July. If.. Stem 2 ft. high ; leave? 

 sometimes ovate-lanceolate ; fertile stam. 3. 



29. XYRIS. Yellow-eyed grass. Juncea. 

 1. X. caroliniana : leaves linear, grass-like; scape 

 ancipitous ; head ovate, rather acute ; scales round. 

 HAB. Swamps, and wet sandy places. July — Aug. 2/. 

 Scape erect simple, 1 ft. high ; fi. yell, in a small 

 scaly head. 

 3. X. brevifolia : leaves subulate-ensiform, short ; head 

 nearly globose ; interior valves of the calyx shorter 

 than the exterior, slightly notched. 

 HAB. Wet places. V-. Scape 12 — 18 in. high, com- 

 pressed above ; leaves twisted. 



30. SC HOLLER A. Narcissi. 



S. graminea. 



HAB. In flowing water. July — Aug. 2{. Floating; 



stem slender, dichotomous ; leaves gramineous ; fi . 



small, yellow, solitary; stam. 4, one of them abortive. 



3 1 . HETERANTHERA. JVarcissi. 

 H. reniformis : leaves orbicular-reniform ; spath 



oblong, acuminate, 2 — 3-flowered. 

 HAB. Overflowed banks of rivers. July — Aug. V-. 



Stem portly floating ; leaves petiolate ; fi. white, 



evanescent. 



32. SISYRINCHIUM. Blue-eyed grass. Index. 

 i. S.anceps: scape ancipitous, winged, simple, nearly 

 leafless ; spath about 4-flowered, unequal, shorter 

 than the flowers ; petals mucronate. 

 HAB. In wet meadows. May — June. %. Stem slender: 

 leaves grass-like ; fl. small, blue ; caps, globose. 

 *. S. mucronatum : scape simple, winged ; scape colour- 

 ed ; one of the valves extended into a long marces- 

 cent point. 

 HAB. In sandy fields. June — July. Ccspitose: spath 

 unequal, coloured ; fi. blue. 



