42 Rhodora [Marcu 
equally spreading and the upper leaf cells are approximately isodia- 
metric. 
Dicranum Drummonpi C. Müll. On the ground in a mountain 
spruce swamp, altitude 1900 feet, Salisbury (G. E. N., 1910). Has 
been collected also in Maine (J. A. Allen, etc.), New Hampshire 
(D. C. Eaton), and Massachusetts (E. Faxon). D. Drummondii 
bears a superficial resemblance to D. undulatum and is doubtless 
often wrongly referred to that species. The two grow in similar 
localities. In D. undulatum, however, the leaves are equally spreading 
or only slightly secund, and the upper leaf cells are considerably 
elongated with porose walls. In D. Drummondii the leaves are 
strongly falcate-secund, and the upper leaf cells are mostly quadrate , 
with non-porose walls. This species ranges from Prince Edward 
Island to New Jersey, and westward to the eastern slopes of the 
Rocky Mountains; more abundant eastward. The capsules mature 
in summer. 
DICRANUM VIRIDE (Sull. & Lesq.) Lindb. On a fallen log in a 
white cedar swamp, altitude 700 feet, Stafford (G. E. N., 1910). 
Reported from all of the New England states except Rhode Island. 
Although it almost never produces fruit, D. viride is able to multiply 
rapidly by means of “Bruchblitter.” The plants occur in loose 
tufts, their leaves spreading out straight and stiff in all directions from 
the stem. During thé growing season the younger leaves ordinarily 
remain intact, but a light touch of the finger is sufficient to cause their 
slender, brittle apices to break squarely off. Under natural condi- 
tions the breaking off is doubtless effected through the agency of 
animals, or by the fall of leaves, twigs, heavy drops of rain, and snow. 
This peculiarity, which is shared by no other eastern Dicranum, is 
a character by which the species may be easily recognized. The 
habitat given above is typical. In general it should be looked for 
in deep, moist woods, on the trunks and bases of trees, or on logs. 
The writer has occasionally observed it growing upon non-calcareous 
rocks. In eastern North America D. viride ranges from Newfound- 
land to Georgia and Minnesota. It is also reported from Alberta 
and Washington, and is common to both Europe and Asia. Accord- 
1 According to Limpricht (Laubmoose”1 : 370.% 1890) D. fulvum likewise has 
brittle leaves. Correns (Vermehrung d. Laubm. 17. 1899), however, is unable to 
confirm Limpricht's observations to any marked extent on fresh material, although 
he finds occasional broken leaves, especially in the older parts of the plant. 
»* 
