1918] SCHNEIDER—AMERICAN WILLOWS 339 
Albert by Fernald and Collins (no. 59, m., f.; G., type). As FER- 
NALD has already pointed out, it closely simulates in habit, bark, 
and foliage S. brachycarpa, but differs from it by its glabrous cap- 
sules and glabrous green bracts. There are, however, pubescent 
forms which look rather intermediate between S. brachycarpa and 
S. chlorolepis, and which have been taken for hybrids by FERNALD. 
The main difference between the two species is, in my opinion, 
found in the glabrousness of the filaments in chlorolepis, which are 
more or less pilose in brachycarpa, and in the presence of numerous 
stomata in the upper leaf epidermis of S. chlorolepis, while S. brachy- 
carpa is entirely destitute of them. The pubescent form agrees 
well with typical S. chlorolepis in this respect, and cannot therefore 
be regarded as of hybrid origin; consequently I propose the follow- 
ing variety: 
S. CHLOROLEPIS var. antimima,’ var. nov.—S. desertorum Fer- 
nald in schedis, non Richardson.—A var. typica nonnisi differt 
ramulis foliisque novellis bracteis vulgo extus et ovariis omnino 
vel parte superiore pl.m. breviter cinereo-villosulis, foliis vulgo 
oblongioribus ad 3:1 cm. magnis etiam adultioribus subtus saepe 
sparse pilosis. 
The following specimens have been examined: Quebec: Gaspé Peninsula, 
Mt. Albert, on wet serpentine slopes, July 23, 1906, Fernald and Collins 
(nos. 512, 512%, f., 512°, f., type, 512, f., 512°, fr., 512‘, m.; G.); July 21, 1906, 
Fernald and Collins (nos. 518, m. paratype, 519, {; G.; no. 519 forma inter- 
media inter var. typicam et var. antimimam videtur et ab cl. FERNALD sub 
nomine chlorolepis X desertorum distributa est); ravine of cold brook, local, alt. 
goo m., August 12, 1905, Collins and Fernald (no. 64,m.,f.; A., N.; “ascending 
shrubs 3-6 dm. high”). There are indeed also some forms which have to be 
regarded as true hybrids between S. chlorolepis and S. brachycarpa. Ishall deal 
with them on a later occasion. 
6. S. NIPHOCLADA Rydberg in Bull. N.Y. Bot. Gard. 1:272. 
1899; CovILLE in Proc. Wash. Acad. Sc. 3:322. fig. 20. 1901.— 
This species is still very little known. Its type was collected in 
1892 by Miss E. Taytor in the Northwest Territories on the 
“Mackenzie River, at a point 30 miles north of the Arctic Circle.” 
I did not see the type specimen, but the specimens mentioned by 
CoviLte (F. Funston, no. 185 and E. A. and A. E. Prebble no. 26), 
5 Derived from dvrtuiuos, closely resembling. 
