S. nigra 
Range extended 
north and south 
large tree, branches 
crooked, ascend- 
ing 
stems in clumps 
old bark flaky 
twigs very brittle at 
base 
hardy 
shoots pubescent 
leaves oblong or lin- 
ear lanceolate 
bases acute to trun- 
cate 
under surface green 
venation very min- 
ute, strong mar- 
ginal 
petiole short 
stipules pointed, 
persistent, non- 
glandular 
blossoms about Ap- 
ril 25 
stamens mostly less 
than 6 
scales short, obtuse 
capsules ovoid coni- 
cal 
pedicel short, slender 
notched stigmas and 
style 
THE WILLOWS OF OHIO. 
S. longipes 
south of 39° lat. 
small spreading top 
single 
deeply laticed ridg’y 
tenacious 
buds winter-killed 
hoary pubescent 
same or broader 
acute to auriculate 
whitish glaucous 
without marginal 
short 
obtuse, persistent, 
non glandular 
May 5 
4—7 mostly 5-6 
ovate 
globose conical 
long, stout 
both poorly devel- 
oped. 
273 
S. amygdaloides 
north and west 
large, branches 
straight 
single 
smooth or roughish 
somewhat brittle 
hardy 
glabrous 
ovate-lanceolate 
acute to cordate 
bluish glaucous 
coarser more regular 
very long 
obtuse, caducous, al- 
ways glandular 
April 15 
cae 
ovate-oblong, acute 
ovoid conical 
long, stoutish 
as in nigra. 
SALIX NIGRA Marsh. BLiackK WILLow. 
A tree occasionally reaching a height of 40 meters and a 
trunk diameter of 1 meter but generally dying when about 15 
meters tall. 
It most often grows in characteristic straggling 
clumps with four or five crooked, leaning stems. 
In the fall it 
drops off most of the season’s twigs leaving the old branches bare, 
a habit which hinders their elongation and in a few years makes 
them thick and stubby. This excess of self-pruning together 
with the straggling clumps in which it grows give it a habit which 
n typical specimens clearly distinguishes it from any other 
