340 BOTANICAL GAZETTE [OCTOBER 
who identified them with the type. The first came from the mouth 
of the Porcupine River in eastern Alaska, while the second was 
found near the mouth of the Seal River, 40 miles northwest of Fort 
Churchill on the Hudson Bay. Through the kindness of Professor 
J. M. Macown I saw also a small specimen collected by F. Johansen 
at Icy Reef in northeastern Alaska in 1914 (no. 164 or 93794 O.), 
which agrees well with Funston no. 185. S. niphoclada is “ appar- 
ently nearest related to S. stricta’ (S. brachycarpa) as stated by 
RyDBERG, while CovILLE was of the opinion that “the nearest 
relative to the species among American willows is S. glauca.” In 
some respects S. niphoclada seems to approach S. desertorum, which, 
however, is still too insufficiently known. The statement in Ryb- 
BERG’S description, “style 5 mm. long,” is clearly a misprint for 
0.5mm. Owing to the lack of more copious material I am unable 
to elucidate the genetic relations between S. desertorum, S. nipho- 
clada, and S. brachycarpa, nor can I properly define the taxonomic 
characters of the first 2 species. The most significant character 
of S. niphoclada seems to me the dense white silky-villose pubes- 
cence of the first season’s shoots combined with the very short and 
densely silky petioles, which apparently do not exceed 2 mm. in 
length, while they are about twice as long and more obvious in 
S. desertorum. 1 am not inclined, therefore, to refer Seton and 
Prebble’s no. 79 (no. 78300 O.) from the Mackenzie district, Artillery 
Lake, Last woods, to S. niphoclada, as it has been determined by 
BALL, as it seems to me more closely related to S. desertorum. We 
know, however, almost nothing of the Salix flora of the woodland 
region of the Northwest Territories, which must be an Eldorado for 
willows. 
The following species which I propose is likewise characterized 
by the very short petioles, but it has an entirely different prostrate 
habit. 
7. S. fullertonensis, nov. spec.—Frutex humilis depressus ramis 
ramulisque vulgo satis elongatis repentibus, floriferis ut videtur 
tantum adscendentibus. Ramuli novelli pl.m. villosuli vel breviter 
sericeo-villosuli, hornotini pl.m. glabrescentes, purpureo-brunnes- 
centes, annotini fere glabri vel partim tomentelli, intense brun- 
nescentes vel fere castanei, interdum subnitiduli, vix ultra 2 mm. 
