109 
936. S. humilis, Marsh. Prairie Willow. 
Dry places ; common. April. 
Dwarf forms are not uncommon, and closely resemble S. tristis, but 
they are not so much branched, the stipules are more evident, and 
the leaves are long and not crowded. 
937. S, tristis, Ait. Dwarf Gray Willow. 
Bogs and borders of sloughs in dry, sandy soil; infrequent, chiefly 
from Englewood, southeast. April. (B.) 
In sandy soil, Normal Park, 10 to 25 inches high; leaves small or 
medium, Hill. 
Seldom over 15 inches in height. A specimen from near Pine Sta- 
tion, Ind., was 28 inches in height; leaves about 1J inches long, 
narrow and quite sessile; aments globular; stipules glandular. 
938. S. petiolaris, Smith. Petioled Willow. 
In low sandy soil, chiefly near the lake shore; frequent. April — 
May 10th. 
Prof. Dudley, of Cornell University, has found, without exception, in 
testing a large number of cases, that the twigs do not disarticu- 
late at the base, while the twigs of S. sericea, which it closely 
resembles in the earlier stages of the development of the staminate 
plants, are brittle, Cayuga Flora , p. 89. 
939. s. petiolaris, Smith, var. gracilis, Ander. 
Colehour, Ind. ; rare. (B.) 
940. S. Candida, Willd. Sage Willow. Hoary Willow. 
Bogs and sloughs of the extreme southeast; frequent. April — May 15. 
Occasionally 8 feet high. 
On a specimen from near Miller’s, Ind., the capsules were light 
pinkish-woolly as were also the young shoots, and the underside 
of the narrowly-lanceolate leaves. 
941. S. COrdata, Muhl. Heart-leaved Willow. 
In wet places; common. April. 
Shrubs 3 to 12 feet high. 
A form in the collection of C. P. Murray, from Whiting, Ind., has 
the leaves broadly lanceolate, sharply serrate, retaining the hairy- 
ness on the midrib beneath, till very late in the season; stipules 
ovate, capsules about 2 lines long. 
Possibly a hybrid cordata x adenophylla, Bebb. 
We have not been able to locate this interesting form, and have only 
the herbarium specimen to examine. As both cordata and adeno- 
phylla grow near Whiting, a hybrid form is liable to occur and 
should be looked for. 
