TRbooora 
JOURNAL OF 
THE NEW ENGLAND BOTANICAL CLUB 
Vol. 9. July, 1907. No. 103. 
SOME NEW OR LITTLE KNOWN FORMS OF NEW 
ENGLAND TREES. 
ALFRED REHDER. 
Tae following descriptions of some little known varieties and forms 
of trees are presented here chiefly for the purpose of drawing the 
attention of collecting botanists to these variations. Trees and partic- 
ularly the more common trees are often passed by by botanists, and 
therefore are usually not well represented in our collections, a fact 
that makes it difficult to trace the frequence of unexpected forms. 
We have still much to learn even in a so comparatively well explored 
region as New England in regard to the distribution of certain varieties 
and the frequence of the occurrence of certain forms of trees. That 
forms like the virgate form of the Red Spruce and the cut-leaved 
forms of Sumach due to spontaneous mutation may occur repeatedly 
and independently, has been shown by the observation made in 
Europe on allied species. We also may be on the look out for similar 
forms in other species or genera. 
Picea mariana var. brevifolia comb. nov.— P. brevifolia Peck, 
Spruces of the Adirondacks, 13 (1897); Britton, Ill. Flor. 3: 496 
fig. 122a (1898); Man. 34 (1901); Brotherton, Amer. Gard. 21: 201, 
2 fig. (1900).— P. nigra var. brevifolia Rehder, Bailey's Cycl. Am. 
Hort. 3: 1334 (1901). 
Differs from the type chiefly in its smaller glaucous leaves. It is a 
small tree, rarely exceeding 10 m. in height with a narrow spire-like 
head of irregular outline; leaves 4-12 mm. long, stout, obtuse or 
mucronate, glaucous; cones 1.2-2.5 em. long, the scales with erose 
margins; seeds 2 mm. long, with wings 4—5 mm. in length. 
This variety is credited by Britton to Vermont, but I fail to find 
