1901] Fernald, — Vascular Plants of Mt. Katahdin. 173 
willow, possibly referable here, was collected in the North Basin, but 
further study is necessary before its identity can be satisfactorily 
made out. 
S. balsamifera, Barratt. By small pool, below Chimney Pond. 
S. Uva-ursi, Pursh. Very common on more exposed slopes and 
tablelands. 
S. erbacea, L. Katahdin (Goodale) ; in moss, head of Eastern 
Slide and on the “ Saddleback,” Eastern Spur (Scribner); in moss, 
head of Saddle Brook. 
Corylus rostrata, Ait. Depot Pond. 
** Betula papyrifera, Marsh., var. cordifolia, Regel. The common 
form of the Canoe Birch in the Great Basin, extending as a dwarf 
shrub to the crests and to the North summits. One of Regel’s type 
specimens was collected on Katahdin in 1847 by Aaron Young. 
DB. odorata, Bechst., var. tortuosa; Regel. (B. papyracea, var. 
minor, Tuck., as to his own specimens in Herb. Gray). Summit 
of North Mt. This shrub, which also occurs on Washington, quite 
lacks the pubescence of B. papyrifera. It is identical with the 
dwarf form of the Scandinavian and Siberian B. odorata, and is 
well represented in Fl. Dan. xvii. t. 2818. 
B. glandulosa, Michx. At various stations above timber-line. 
Most of the Katahdin material is var. rotundifolia, Regel. 
Alnus viridis, DC. Common on lower slopes, following brooks to 
the crest. l 
Comandra livida, Richards. Abundant on the floor and the South 
wall of the North Basin ; rare on North wall, South Basin. 
Rumex Acetosella, L. Few plants introduced at site of old Appa- 
lachian hut, near Chimney Pond. 
Polygonum viviparum, L. “ Long Crooked Slide," South wall, 
South Basin (Scribner); notch between the Chimney and Pomola. 
Arenaria groenlandica, Spreng. Common. 
Stellaria borealis, Bigelow. By rivulet at 1385 m. (4500 ft.), South 
Basin (E£. D. Merrill). 
Thalictrum polygamum, Muhl. Depot Pond. Flowering speci- 
mens 2.5 dm. (10 in.) high. 
Ranunculus Flammula, L., var. reptans, E. Meyer. Depot Pond. 
R. acris, L. Few plants introduced at site of old Appalachian 
hut, near Chimney Pond. 
Coptis trifolia, Salisb. Common. 
