906 
even in our largest herbaria, labelled P. Pennsylvanica. I suppose 
this is so because Dr. Gray used that name in the fifth edition of 
his Manual for the complex species which he afterward called P. 
lanceolata.* From the description one would think that P. Penn- 
sylvanica were one of the forms there included, rather than a form 
of P. viscosa. But as such careful workers as Nees and Dunal, and 
Gray in his later years, classed P. Pennsylvanica among the stellate 
species, either as a form of P. viscosa or as a species nearly related 
to it, I shall also leave it there, especially as I have seen at Har- 
vard University, a tracing of the specimen in the Linnaean her- 
barium. It resembles a small-leaved form of 7. viscosa and a 
note in pencil states that the pubescence is-stellate. This does 
not agree with the Linnaean description which gives it as pruinose. 
The real nature of the pubescence of 7. viscosa is hard to make 
out with the naked eye and Linnaeus states somewhere that he 
could not work with “oculis armatis. This may be the reason 
why he called the pubescence pruinose instead of stellate. 
In the eighth edition of Miller's Gardeners' Dictionary, 1768, 
'there are several species named and described. Except those 
mentioned above, I do not know that there are any of interest to 
us, except P. Virginiana.t Most authors regard it as synonymous 
with P. lanceolata Michx.,+ others as the same as P. Pennsylvanica 
L., probably because both have been misunderstood and confused. 
Dr. Gray adopted the name P. Virginiana for the common broad- 
leaved, viscid perennial, which should be known as P. heterophylla 
Nees.$ He gives the reason for so doing in the Synoptical Floral| 
where we read: * This early name of Miller, taken up for the 
present species in Proc. Am. Acad., Le, must from the size of the 
flower belong to it, or to a broad-leaved and hairy form of P. /an- 
ceolata. Miller's remark that the root does not creep in the 
ground is most applicable to the latter; but the color, as well as 
the size of the corolla and the ‘ pale yellow ' fruit, also the diffuse 
growth, best accord with this common species." From this it may 
be: seen that Dr. Gray was not certain that he applied men name 
* Proc. Am. Acad. 10: 67. 1874. —— 
+ Mill. Gard, Dict. Ed. 8, no. 4. 1768. 
1 Michx. Fl. Bor. Am. 1: 149. 1803. 
€ Linnaea, 6: 463, 1831. 
] Gray, Syn. Fl. 2: pt. 1, 235. 1878. 
