4 
_ miles to the west, Knoxville being previously the western kaowt 5 
304 
Last year I had an opportunity to study this plant in the field 
in both the flowering and fruiting state, and have been lead to the 
conclusion that Nuttall was right in considering it a species. In 
April I encountered the plant in flower on Stone Mountain, 
Georgia, where it grows at altitudes ranging from 1,000-1,400 feet, 
and in July in fruit. Being well acquainted with P. dubia the 
dissimilarity between the two forms was striking and in the living 
state P. hirsuta does not exhibit much likeness to P. dudia. 
The plant is of a shorter and stouter build, erect and of a firm 
texture, and the racemes crowded even in fruit, whereas P. dubia 
is elongated, slender, spreading and with early interrupted ra- 
cemes. The flowers and fruit furnish good distinctive characters: 
The corolla of P. hirsuta ranges from 13-15 mm. in breadth andthe 
segments strictly entire, while that of P. dudia is only 8-11 mm. 
broad and has the segments more or less erose. The color of : 
the former is dark purple, or, according to Nuttall, “ purplish 
blue,” and its pod is less compressed than the latter; the seeds are : 
twice as large, covered with large papilla. The pod of P. hirsuta 
is orbicular, rather broader than high, opposed to the broadly 
oblong pod of P. dudia. 
PENTSTEMON Sma. Heller, Bull. Torr. Club, 21: 25 (1894). : 
Mr. E. P. Bicknell has lately discovered this handsome species 
at Nashville, Tennessee. He remarks that it grows plentifully 0” 
the bluffs of the Cumberland River about that city. Two forms 
were noticed and collected by Mr. Bicknell ; the one has glabrous: 2 
leaves as in the type, while in the other both the upper and lower 
surfaces of the leaves are canescent. I never noticed this latter 
character on any of the numerous plants observed and collected 
by Mr. Heller and myself in the mountains of North Carolina. 
It is probably due to local influences. The plants were in full j 
bloom during the first weeks of May. The above collection extends a 
the geographical range of this Pentstemon’ about two hundred 
limit. 
CUSCUTA ARVENSIS Beyrich; Hook. Fl. Bor. Am. 2: 77 (1834)- os 
Grows about the base of Stone Mountain, Georgia, in mats va 
Gymnolomia Porteri, where this species forms dense patches. Th 
3 
