A Revision of the Genus Clematis of the United States. 125 
from Georgia in the Philadelphia Academy Herbarium, is labeled “a 
mere pubescent variety of C. Virginiana,” a conclusion I had before 
reached. The entire leaflets have caused me to refer it to C. Virgini- 
ana, var. bracteata. 
Almost the same may be said in respect to C. Catesbyana. This is 
better known, but is also doubtful. A specimen from Florida in the 
Agricultural Department Herbarium, has much the aspect of C. Vzir- 
giniana, and others in the Herbarium of Mr. I, C. Martindale, would 
be difficult to separate from C. Virginiana. Here again the pubes- 
cence and the entire lobes of the leaves constitute the differences be- 
tween it and the C. Virginiana, two differences which should never 
be aione sufficient to characterize a distinct species. 
15. C. tigusticrroLia, Nutt.—Climbing, somewhat pubescent ; stems 
elongated, sometimes 30 feet long ; leaves ternate or mostly five foliate; 
leaflets coriaceous, broadly ovate to lanceolate, 3-lobed or coarsely 
toothed, rarely entire or 3-parted, 14’-3’ long; flowers white, dicecious, 
in paniculate corymbs ; sepals thin, silky, from 4’’-6” long ; akenes 
pubescent, tails one to two inches long, plumose.* 
Var. BREVIFOLIA, Torr. and Gr.—‘‘ With nearly smooth, broadly 
ovate, sub-cordate, three-lobed leaflets.’ + 
Var. BRACTEATA, Torr.—‘Leaflets 3-5, deeply cordate, incised, lobed, 
dentate, glabrous on both sides, the bracts of the flower very large, 
obovate, entire.” 
Var. CALIForNICcA, Watson.—“ Leaves silky tomentose beneath, often 
small.’’§ 
The two preceding species, C. Virginiana and C. ligusticifolia, the 
most widely distributed of the Genus in the United States, are very 
closely related to each other. The ligusticifolia of the West, is the 
representative of the Virginiana of the East, and it is doubtful if it is 
entitled to rank higher than a geographical variety. The differences 
are confined almost entirely to the pubescence on the leaves, and to 
their being 3-foliate in one, and 5-foliate in the other. These differ- 
ences, the only apparent ones, are by no means constant, for the leaves 
vary from smooth to very pubescent on both sides, and the leaflets are 
in the var. bracteata, sometimes only 3-lobed as in the Virginiana. 
* Watson, King’s Report, vol. y., p. 3. Torr. and Gr. Fl. vol. i., p. 9. Brew. and Wats. 
Bote Oals, VOl. is, D-d- 
+ Watson, King’s Report, vol. 5, p. 3. 
t Torrey, Bot. Wilkes’ Expe., p. 211. 
§ Brew. and Watson, Bot. Cal., vol. i., p. 3. 
