1918] SCHNEIDER—AMERICAN WILLOWS I4I 
based his var. groenlandica on ‘‘S. arctica Fl]. Dan. t. 2488,” and 
he distinguished 6 forms: (1) hebecarpa, which is nothing but the 
type; (2) lejocarpa, with glabrous ovaries; (3) Jatifolia, which 
probably only represents a vigorous form with ‘‘foliis orbiculato- 
ovalibus’’; (4) angustifolia, a mere form with “‘foliis lanceolatis’”’; 
(5) macrocarpa, which is nothing but the typical plant with normal 
big aments; and (6) pusilla, which I cannot interpret because the 
description (“‘fruticulus vix digitalis, foliis 1-3 lin. longis densis- 
sime confertis. Salici retusae ser pyllifoliae analoga’’) is insufficient, 
and ANDERSSON does not cite a type or any locality for it. The 
description and figure given by LreBMANN are quite sufficient to 
understand what form is meant, and it is rather surprising that 
this well marked species could be misunderstood by later authors. 
Lunpstr6m did not say much about it, because he was dealing with 
Asiatic and European forms, and only wanted to separate it from 
the related species. LANGE (Consp. Fl. Groenl. 1:108. 1880), 
in adding his var. ‘“‘minutifolia And. mscr.’’ to those already 
described by ANDERSSON (but omitting f. macrocarpa), referred 
S. arctica Br. (S. Brownei Ldstr.) as a synonym to S. groen- 
landica, and seems to have misunderstood Brown’s plant. Ryp- 
BERG, in his turn, as I have said, mixed the real S. groenlandica 
with his S. anglorum, and gave the name groenlandica to specimens 
of the latter species and to several forms of different origin. In 
my opinion the true S. groenlandica may easily be recognized by 
its glabrous leaves, which are shining dark green and without 
stomata above and distinctly glaucescent beneath, the margin being 
entire or often more or less glandular denticulate, by its large 
aments which measure from 5:1.2 to 10:1.6 cm. in fruit, and by 
its distinctly pediceled ovaries, which bear a rather thin and short 
silky pubescence even when young and possess a short and broad 
gland of about half the length of the pedicel. The shape of the 
ventral gland, which is the same in both sexes, differs much from 
that of the other species of this group where, as a rule, it is oblong 
or ovate-conical and longer than the pedicel. The thin pubescence 
of the ovaries and fruits, which are often almost glabrate or entirely 
glabrous in var. lejocarpa (And.) Lange, gives them a different 
aspect from the tomentose capsules of S. arctica, S. anglorum, or 
