ASHE: TREES AND SHRUBS OF WASHINGTON 223 
thium, and red (not yellow) autumnal foliage; from A. oblongi- 
folia, by its darker green, more lucid, and relatively broader leaves, 
later blooming, and reflexed (not ascending) sepals; from A. sto- 
lonifera, by its habit and size, later blooming, smaller calyx, 
glabrous hypanthium, and by the different color and texture of 
its leaves. The inflorescence of A. sera, on account of the numer- 
ous bright scarlet bracts, has a decidedly reddish aspect (re- 
sembling that of A. saxatilis Blanch.), until the bracts fall as the 
petals being to expand. For several seasons this plant was re- 
garded as A. laevis forma nitida Wiegand,* but Dr. Wiegand, after 
examining a specimen, states that it is not his plant. Specimens 
are being deposited in several American herbaria. 
Amelanchier micropetala (Robinson) sp. nov. 
Amelanchier oblongifolia var. micropetala Robinson, Rhodora Io: 
33. 1908. 
According to Wiegand the probable parents of this supposed 
hybrid are A. oblongifolia and A. stolonifera. The general distri- 
bution of the plant, however, the fact that it has been reported 
from points where the putative parents are not now known to 
grow,t and its local abundance in certain localities seem to justify 
disregarding its probable hybrid origin. A. micropetala is distin- 
guished from A. oblongifera by its shorter, broader, firmer and 
somewhat darker leaves, and from both A. oblongifolia and A. 
stolonifera by its petals, which are scarcely half as long and yel- 
lowish or cream-colored instead of being white. Weatherbyt con- 
siders the peculiar features of the petals may be due to the 
teratological condition known as staminody. The typical form of 
A. micropetala is known from eastern Massachusetts and Con- 
necticut. 
Amelanchier micropetala potomacensis var. nov. 
A slender, stoloniferous shrub with the general size (3-10 dm. 
high), habit (forming small clumps) and leaf-shape of A. stolon- 

* Rhodora 14: 155. 1912. 
+ Dr. Macbride writes that the supposed parents do not grow within man 
of plants of A. micropetala collected by Mr. Weatherby. 
t Rhodora 18: 49. 1916. 
y miles 
