BOTANICAL EXCURSION TO NORTH CAROLINA. 67 
a few specimens of Pycnanthemum montanum, Michx. (Mo- 
nardella, Benth.) just coming into blossom. Our plant ac- 
cords with Michaux’s description, except that there are fre- 
quently two or even three axillary heads besides the terminal 
one. The flowers have altogether the structure of Pyenanthe- 
mum, and the upper lip of the corolla is entire; so that it 
cannot belong to Monardella, although placed as the leading 
species of that genus. As to the species from which Mr. Bent- 
ham derived the generic name (Pycnanthemum Monardella, 
Michx.), I am by no means certain that it belongs either to 
Pyenanthemum or Monardella. The specimen in the Mi- 
chauxian herbarium is not out of flower, as has been thought, 
but the inflorescence is undeveloped, and perhaps in an abnor- 
mal state. In examining a small portion taken from the head, 
I found nothing but striate-nerved bracts, obtuse and villous 
at the apex, and abruptly awned; the exterior involucrate 
and often lobed; the innermost linear, and tipped with a sin- 
gle awn. The aspect of the plant, also, is so like Monarda 
jistulosa, that I am strongly inclined to think it a somewhat 
monstrous state of that, or some nearly allied species; in 
which case, the genus Monardella should be restricted to the 
Californian species. Pursh’s P. Monardella, I may observe, 
was collected beneath the Natural Bridge in Virginia, where 
we also obtained the plant, and subsequently met with it 
throughout the mountains. It is certainly a form of Monarda 
jistulosa, according to Bentham’s characters, but the taste is 
much less pungent, the throat of the calyx less strongly 
bearded than is usual in that species, and the corolla nearly 
white. We thought it probably a distinct species; but these 
differences may be owing to the deep shade in which it com- 
monly occurs. The P. Monardella of Elliott, according to 
his herbarium, is identical with that of Pursh. We collected 
in Ashe County several other species of Pycnanthemum, and 
in the endeavor to discriminate them, we encountered so 
many difficulties that I am induced to give a revision of the 
whole genus. 
Some additional plants were obtained around Jefferson 
which were not previously in blossom, such as Campanula 
