98 
THALICTRUM CORIACEUM (Britton) Small. 7: diowum, L., var. 
coriaceum, Britton, Bull. Torr. Club, xviii. 363. 
The plant here raised to specific rank was first published by 
Dr. Britton as a variety of Thalictrum dioicum. After a thorough 
study of it in the field, it has been found to possess excellent 
specific characters, which are briefly brought out in the following 
description, the most prominent being italicized: 
Perennial, root-stock and fibres large, dright yellow ; strictly 
dicecious, rather strict, glabrous and more or less glaucous. Stem 
erect, 9-16 dm. tall, branching above into a compound panicle, 
striate; leaves ternately-decompound, ‘short petioled, the petiole 
at the base expanded into two large stipular appendages, divisions 
of the leaflets varying from obovate to reniform-orbicular, almost 
white beneath, mostly deeply and sharply incised, quite coriaceous, 
veins prominent on the under surface; staminate flowers white, 
rather few, anthers linear, subulate-tipped, longer than the filiform 
filaments; pistillate flowers purple, numerous, ovary shorter than 
the style; achene oblong-ovoid, rather acute, about the same length 
as the persistent style, sharply ribbed, generally long-stalked. 
_ Discovered at two localities in Southwestern Virginia, in the 
Blue Ridge along Nick’s Creek, alt. 2,400 feet, and in the Alle- 
ghanies on White Rock Mountain, alt. 4,000 feet. 
Thalictrum dieicum, L. Staley Creek, alt. 2,200 ft. Slopes of 
White Top Mt., alt. 2,600—5,000 ft. 
Thalictrum polygamum, Muhl. Banks of the James River, Lynch- 
burg, alt. 500 ft. Falls of the Holston, below Marion, alt. 
2,050 ft. : 
Thalictrum purpurascens, L. Walker Mt., alt, 2,800 ft. 
The only locality observed and not far from the southern ob- 
served limit of the range of this species, which is about the summit 
of the Blue Ridge in Watauga Co., N. C.* 
Syndesmon thalictroides (L.) Hoffmsg. Vicinity of Marion, alt. 
2,100-2,500 ft. 
On some of the plants gathered the leaflets were 3 cm. long 
and 4 cm. broad. A few plants were also noticed with pink 
flowers. 
*Mem. Torr. Club, iii. 6 and 22. 
