A Revision of the Genus Clematis of the United States. 121 
Philadelphia, and it is in appearance simply a small ochroleuca, Dr. 
A. Gray has examined the specimens described by Pursh in the Sher- 
ard herbarium at Oxford, England, and concludes it to be the same as 
ochroleuca.* Between ochroleuca again, and the form described as 
Fremontii, the resemblances are very strong, and the differences ex- 
tremely slight. The most important difference is in the carpels. In 
the ochroleuca these have the tails long, and very plumose, while in 
the Fremontii they are short, filiform, “ naked above, silky below.” 
Yet in a specimen in the herbarium at Harvard, the tails are long and 
quite hairy, especially at the base. Now as the Fremontii is a very 
local species, being confined, as Mr. Lewis Watson, who rediscovered 
the plant, writes me, to a space of about forty square miles, would it 
not be safe to conclude that the Premontii, being the western analogue 
of the ochroieuca, is in reality only a peculiar variety of it, produced 
by various circumstances of climate and soil? Such, at all events, 
seems the case to me, and I have therefore called it C. ochroleuca var. 
 Fremontit. 
b.—Stems climbing ; leaves pinnate. 
7. C. Viorna, L.—Stem striate, smooth; leaflets 3-7, ovate or 
oblong, sometimes slightly cordate, 2-3 lobed or entire, smooth, upper- 
most leaves often simple, sparingly reticulated when old; flower 
terminal, nodding, dark reddish purple; calyx ovate, and at length 
bell shaped; sepals very thick and leathery, tipped with short re- 
curved points, ovate lanceolate, one inch long; tails of the carpels 14 
inches long, very plumose, persistent.t 
Var. coccinEA, James (Long’s Expedition) (C. coccinea, Engelm.,t 
C. Texensis, Buckl.)—Leaflets coriaceous, obtuse, convex, entire, 
glaucous ; flower red, sepals smooth. 
Var Pircuerti, James (C. Pitcheri,§ Torr. & Gr.) Leaflets ovate, 
* Note in Herb. at Harvard, and in Curtis’ Bot. Mag., Dec. 1881. 
+ Gray’s Man., p. 36, Wood Cl. Bk., p. 201. 
t OC. coccinea, Engelm. ‘“ Glabrous, stem very slender, climbing, branched; leaves thin, 
coriaceous, on slender petioles, 3-5 foliate; leaflets on very slender petiolules; the lateral 
ones broadly ovate or ovate-cordate, obtuse, apiculate, convex, glaucous beneath, entire, 
reticulately veined ; the terminal one larger and broader, entire or 3-lobed ; flowers solitary, 
en very long peduncles, scarlet; perianth ovoid; sepals glabrous, the margins silky- 
tomentose, thick, coriaceous, ovate lanceolate, erect, the apex acute and recurved; akenes 
villous, the tails elongated, plumose, persistent.’’ (Curtis’ Bot. Mag. Dec. 1881.) 
2 CO. Pitcheri, Torr. & Gr. Stem climbing; leaves pinnate; leaflets 3-9, ovate or some- 
what cordate, acute or obtuse, entire or three lobed, sub-sessile, much reticulated, upper 
leaves often simple; flower nodding, pedunculate: calyx bell-shaped, the dull purplish 
sepals with narrow and slightly margined recurved points; tails of the carpels filiform, 
pubescent or villous. (Gray’s Man., p. 36, etc.) 
