166 Britton: Four NEw Nortu AMERICAN BIRCHES 
‘Betula Sandbergi sp. nov. 
Young twigs loosely pubescent, green, becoming brown. 
Leaves rhombic-ovate, acute, rather evenly serrate, dark green 
and strongly netted-veined on the upper side, light green, very 
glandular and slightly pubescent on the veins beneath, 6 cm. long 
or less, cuneate at the base; petioles glabrous, 1.5 cm. long or 
less ; staminate catkins 6 cm. long or more; strobiles slender- 
stalked, cylindric, 2—2.5 cm. long, about 6 mm. thick, their scales 
about 4 mm. long, pubescent, 3-lobed at the apex, the middle 
lobe a little longer than the blunt ascending lateral ones, all the 
lobes blunt; nut oval to obovate, 1.5 mm. long, rather narrower 
than its wings. 
Type collected by J. H. Sandberg in swamps, Hennepin 
County, Minnesota, June, 1890, and distributed as Betula mgra. 
Betula Alleghaniensis sp. nov. 
Resembling B. /enta and B. lutea, attaining about the same size 
as the former but smaller than the latter. Bark either close and 
furrowed, or peeling off in thin yellowish gray layers ; young twigs 
long-pubescent, becoming brown and shiny ; leaves ovate to ovate- 
oblong, usually gradually acuminate, 12 cm. long or less, rather 
coarsely and sharply serrate, mostly cordate at the base but some- 
times rounded, dark green and glabrous above, yellow-green and 
more or less pubescent on the veins beneath when mature ; petioles 
pubescent, about 1 cm. long; staminate catkins 6 cm. long oF 
more, their scales broadly ovate and obtusish ; strobiles oblong- 
cylindric, 2-3 cm. long, very short-stalked or sessile, their scales 
4-6 mm. long, pubescent, nearly or quite as wide as long, 3-lobed 
above the middle, the wedge-shaped part below the lobes short, 
the margins ciliate; nut narrowly obovate to oblong, 2-3 mm. 
long, mostly narrower than its wings. 
Type specimen distributed by the Biltmore Herbarium, %¢- 
z619, collected on the upper slopes of Mt. Pisgah, western North 
Carolina, September 21, 1897. 
This tree has been confused with both the cherry birch and 
the yellow birch. Its range as known to me is from Massa- 
chusetts to Quebec and northern Michigan, south to southern 
New York, Pennsylvania, and in the mountains to Georgia. 
F New York Boranicat GARDEN. 
