2c. var. pubescens E. Small
Stems relatively
hairy at the nodes. Leaf blades tending to have fewer lobes, those of the
larger leaves unlobed or more commonly 3(4)-lobed, all of the leaves with 3
main veins from the base, the undersurface densely pubescent along the veins
and usually also between them, the midvein with mostly more than 100 hairs per
cm, also moderately to densely glandular with stalked glands, the surface between
the veins mostly with more than 25 glands per square cm. July–October.
Scattered nearly
throughout the state but apparently absent from the Mississippi Lowlands
Division and some western portions of the Ozarks (Nebraska to Arkansas east to
Pennsylvania and North Carolina). Banks of streams and rivers, margins of
lakes, bottomland forests, and moist ledges of bluffs; also fencerows,
railroads, roadsides, and disturbed areas.
This is by far
the most common variety of H. lupulus in the state. The mostly northern
var. lupuloides E. Small occurs immediately to the north of Missouri and
should be searched for in the northernmost counties. It differs from var. lupulus
in being somewhat less densely pubescent on the leaf undersurface, with hairs
usually absent between the veins and more than 20 but less than 100 per cm
along the midvein. It also tends to have more of the leaves 3-lobed, including
most of the smaller leaves, whereas in var. pubescens the smaller leaves
generally are unlobed and some of the larger leaves also can be unlobed.