1§2 MR. NUTTALL’S DESCRIPTIONS OF NEW 
I have ventured, as I think on sufficient grounds, to separate the American from 
the European hop. Found as it is, in the uncultivated interior of the continent beyond 
the reach of inhabitants, our plant must necessarily be indigenous. I have compared 
the present with the foreign plant with some attention, and I can in all cases readily 
distinguish them by their foliage. In the American plant, whatever be the other 
variations of the leaf, the attenuated points are denticulated nearly to the extremity. 
In the European the summit of the leaf is abruptly toothed. In the native plant, the 
male flowers appear to be smaller; and the scales of the cone are likewise acuminate. 
In some specimens, as in the European plant, the upper leaves are simply cordate, 
and entire, but in all cases the denticulations are smaller, and more numerous. 
Mr. James Read, who has long ardently studied the botany of his own country, 
after a distant voyage, has presented to the herbarium of the Academy of 
Natural Sciences, among many other curious plants of China, a small male 
specimen of the hop of that country, collected near Canton: and this also appears to 
be a form sufficiently distinct again from the European hop. From its strong 
armature it might be called Humutus *acuteatus. The young stems and petioles are 
very sharply aculeate ; the uppermost leaves are all palmate, five-lobed, and hairy 
along the ribs; the segments of the pubescent calyx are lanceolate. 
Has. Throughout the United States in alluvial situations. I have also most 
luxuriant specimens from the borders of streams in the Rocky Mountains, near 
the line of New Mexico, collected by Dr. Gambel. 
PECTOCARYA. 
P. PENICILLATA. Very common round Santa Barbara and other parts of 
Upper California. Often scarcely distinguishable from P. chilensis, except by the 
smaller fruit, the margin of which, as in P. chilensis, is not unfrequently pectinately 
bristled the whole length; they are all, therefore, little more than varieties of each 
other. The plant I referred to Cynoglossum pilosum, (Gen. Am. i. p. 114,) is a true 
Myosotis wholly distinct from either the present plant or that of Peru. More than 
seven years back, I had formed a genus for this plant, (SrAuRDNA,) of which I 
deposited specimens in the Herbarium of the Academy of Natural Sciences in 
Philadelphia. In our plant, the stigma is capitellate and emarginate, the seed 
- euneate-oblong, and the radicle inferior or pointing towards the style. 
MONARDA. 
M. *pectinata. Biennial? slightly pubescent; leaves oblong-lanceolate, denticulate, shortly petiolate ; 
eapituli proliferous, rather small, subtended by herbaceous bracts, some of them purplish, ovate-acute, 
strongly ciliated, as well as the elongated setaceous teeth of the calyx ; corolla widely ringent, the 
tube scarcely exserted beyond the calyx. 
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