190 
rigida, 
petiolaris. 
DIOECIA, DIANDRIA. 
remotely-serrated, very entire at the apex, glau- 
cous beneath; stipules deciduous, lanceolate, 
serrated ; aments appearing nearly at the same 
time with the leaves, diandrous, oblong, tomen- 
tose; scales oblong, acute, with black hairs; 
- germs subsessile, lanceolate, tomentose; style 
of moderate size ; stigmas biparted.— Willd. and 
Pursh. 
Icon. Muhl. in annals of Bot. 2. t. 5. 
Red-rooted Willow. 
In low swampy grounds, nine miles south-west of Philadel- 
hia, not unfrequent. The twig's are tough and used for mak- 
ing baskets. kh. April. 
i 
+t 7 Leaves thick and acute, serrated. 
* Triandrous. 
4. S. leaves oblong-lanceolate, acuminate, base 
subcordate, rigid, glabrous, narrowly serrated ; 
serratures elongated below; petioles villous ; 
stipules large, cordate, obtuse, glandular-ser- 
rated; aments appearing with the leaves, sub- 
5-androus; scales lanceolate, covered with black 
wool; germs on long pedicels, lanceolate, 
smooth; style very short; stigmas biparted.— 
Willd. and Pursh. 
S. cordata, Mich., not Muhl. . 
S. cordifolia, Herb. Banks, Mss. (Pursh.) 
Stiff-leaved Willow. 
In swampy hedges, on low grounds, two miles below Phila- 
delphia, not far from the Chester read. Also used for making 
baskets. hb. April. 

* * Diandrous. 
5. S. leaves lanceolate, every where serrated, 
smooth, glaucous-silky beneath, generally un- 
equal at the base; stipules ternate, dentated, 
small; aments appearing before the leaves; 
