228 Scientific Intelligence. 
United States plants, Clematis Pitcheri is referred to C. reticulata: 
the flowering specimens of the two are sometimes puzzling, but the car- 
ies are quite different. C. lasiantha, Nutt. is identified with C. Peru- 
na, DeC.; and C. . pauciflora, Nutt. is suspected to be C. heaasepala, 
De. N attall’s Polygaia alba is superseded by the posterior name of 
P. bicolor, H. B. K., because “the color of the flower varies, being 
greenish-w hite, white, rose-color, and dark-purple;” but for the same. 
reason the name of bicolor is almost as objectionable. C. asperuloides, 
which is doubtful. P. Americana is here supposed to include P. grand- 
iflora, Walt., ovaiifolia and suberule, Gray, and ey Sale Des besides 
two or t me more like it. . leptocaulis, Tor rT. r. is said to be P. 
Chihuahua, A conside ast number of new species are a ranad i 
all of which will have to be collated with Dr. Engelmann’s recent 
tailed monograph. Philadelphus Mezicanus, Schlect, is said to embrace 
P. serpyllifolius, Gray. phe Composite: axe elaborated by Dr. Schulta, 
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lucia and eyen Cosmos to Bidens ; and, if formerly inclined to undue 
multiplication of genera, now makes, perhaps, more than amends, by not 
only acceding to the reduction of Acourtia, Dumerilia, &c. to Perezia 
(as proposed by the writer), but even referring the whole to Trizis, 
which is rather more than we counted on, although perhaps a logi 
consequence : also by reducing Chaptalia, Leria, Lieberkuhnia, Loxodon, 
, &e. to Gerbera! Me, plates of this ncaa which ee 
to the Mexican flora are three : two new species of “Viscum,” 
Phoradendra, and Caleel marginal Benth., which as es looks # 
unlike that species as pos 
4. Synopsis of the Ua te ‘of the United States and Adjacent Regions} 
y George Encetmann, M.D. (From the Proceedings of the Americad 
Academy of Arts and Sci iences, vol. ili), Cambridge, 1856. pp. 53.— 
Besides his ample and fully illustrated memoirs on Cactacee, in one of 
the Pacific — Survey Reports, and in the Hepat of the Me ane} 
species, now so numerous, with fu characters of those which he has a 
before well described. Altogether, these memoirs constitute a very. 
and invaluable elaboration of an extremely difficult, but very interesting 
family,—difficult not only from the peculiar betas to collecting and 
lip 
later, 
