HEXANDRIA.— TRIG YNIA. 1 59 



TRIGYNIA. 



254. MELANTHIUM. Melanthacece. 



1. M. virginicum : panicle pyramidal, petals oval. 



somewhat hastate, flat ; flowers mostly perfect. 

 HAB. Wet Meadows. July- Aug. 4. . Stem 3 ft. 

 high ; pan. large, loose ;fl. polygamo-dioic, green- 

 ish zvh., at length brown. 



2. M. dioicum : root a tunicated bulb ; leaves glau- 



cous, gramineous, margined ; raceme mostly sim- 

 ple, few-flowered ; flowers perfect ; petals round- 

 ish, unguiculate, with two spots ; seeds subulately 

 winged. 

 HAB. Banks of Rivers. July— Aug. Afoot high, Jl. 

 whitish. 



3. M. hybridum: panicle racemose, petals suborbicu- 



lar, plaited, with long claws ; glands connate. 

 HAB. Pennsylvania. Stem 2 ft. high; leav. loiig-lin. 

 Jl. not changing. 



255. VERATRUM. Green and White Hellebore. 

 Melanthacece. 



V. viride : racemes paniculate ; bracts of the bran- 

 ches oblong-lanceolate ; partial ones longer than 

 the subpubescent peduncles ; leaves broad-ovate, 

 plicate. 



IIAB. Swamps. June — July. Root large ; stem3 — i 

 ft. high ; Jl. green. 



25G. HELONIAS. Melanthacece. 



1 . H. latifolia : scape leafless ; spike ovate, crowded ; 



bracts linear-lanceolate, leaves lanceolate, mucro- 



nate, nerved. 



HAB. Swamps. May. Fl. pale purp. ; anth. blue. 



_'. H. erythrosperma : scape leafy ; leaves linear, very 



long ; raceme oblong ; bracts short ; capsule 



shortened, with divaricate horns ; seeds ovate. 



red. 



HAB. Shady river banks and mountains. June. U . 



