104 Rhodora. [JUNE 
Pinus Taeda does not exist except as a planted tree in Prince George’s 
County, although accredited to this County by Professor Chrysler." 
It is possible that Pinus rigida may have been taken for Pinus 
Taeda in this instance. The former is common in Prince George’s 
County, while the latter has never been observed wild there, as far 
as I know, by any of the local botanists of Washington who are per- 
haps more familiar with the situation than botanists from a distance.? 
Pinus Taeda can always be distinguished from Pinus rigida as the 
cones in the former are fully twice as long as those of the latter, not 
to mention any of the leaf-characters. On the Eastern Shore of 
Chesapeake Bay I have noticed Pinus Taeda at Claiborne, Easton, 
Wye Mills, Queen Anne, Denton, Md., and at Lewes, Delaware, and 
throughout Accomac and Northampton Counties, Va. In those 
places it forms forests or is scattered among deciduous trees and 
Pinus virginiana. 
Pinus RIGIDA Mill. This pine is a northern tree *: It disappears 
from the coastal plain in Virginia. In the mountains I have observed 
it in a number of places; at Cumberland, Md., it is common; at 
Covington, Va., it is mixed with Pinus pungens and sparingly with 
Pinus Strobus. It is frequently found mixed with Pinus virginiana 
in the Piedmont region and on the coastal plain. It sometimes forms 
forests or smaller colonies as at Lewes, Delaware, where I have seen 
it and Pinus Taeda in almost equal numbers. I have no knowledge 
of its occurrence south of this place except further inland at higher 
altitudes towards the fall line. 
Pinus Srrosus L. This picturesque pine is frequent throughout 
the western counties of Maryland and Virginia. I have observed. 
it at Pen-Mar [Tm. 5875], at Covington, Va. [Tm. 3157], and elsewhere. 
Mr. H. H. Bartlett has found it at Rockville, Md., and Mr. H. S. 
Barber near the Potomac River in Virginia some ten miles upstream 
from Washington, D. €. 
Pinus skROTINA Michx. This tree has been observed by Mr. R. 
M. Harper * between Portsmouth and Suffolk, Va. It is an inhabitant 
of sandy swamps in the coastal plain and ranges from Virginia to 
1 Plant Life of Maryland, p. 155. 
? Much argument ecological falls of its own weight when the entities considered are 
not known to the observers. 
3 It was known in Europe under the name 
as early as 1768 or earlier. 
4 Torreya 3: 122, 1903. 
the Three-leaved Virginian Pine Tree?” 
