leaves of his plant are perfectly entire; that the stem leaves are 
dilated at the base and amplexicaul; that the peduncles are elongated 
as well as the compound filiform pedicels; that the bractez are 
ovate; that the corolla is yellow at the apices of its lobes; that the 
upper surface of the lower lip has long yellowish hairs; and, finally, 
that the barren filament dips to the lower side of the corolla, and is 
covered with yellowish hairs. But Dr. Hooker's figure is totally at 
variance with all this in every particular: his radical leaves are 
strongly serrated, and although this is occasionally slightly the case 
with Dr. Graham's plant, yet it is not a usual character ; the stem leaves 
are neither dilated at the base nor amplexicaul; the peduncles are 
not elongated, but are, on the contrary, particularly short; there is 
no yellow at the apices of the lobes of the corolla ; and, finally, there 
is no appearance of yellow hairs upon either the lower lip of the 
corolla, or upon the barren filament. But Dr. Hooker adds, that his 
poni agrees with specimens collected by Mr. Douglas about Red 
iver, which are also identical with Mandan specimens named by 
Nuttall himself. Having, fortunately, the advantage of referring to 
Mr. Douglas's Red River specimens in the possession of the Horti- 
cultural Society, we find them indeed agreeing most exactly with the 
figure of the Glasgow plant, but not at all with those in our own 
Herbarium of Dr. Richardson's plant. 
The explanation of all this is clearly, that the figure in the 
Botanical Magazine is of P. gracilej— of which it is, by the way, an 
excellent representation, — while the description is of P. glaucum; 
and that these two species are not the same, as Dr. Hooker has 
concluded. 
J. L. 
