Common Name:
COMMON HOPS, HOP
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Coefficient of Conservatism:
3
Coefficient of Wetness:
3
Wetness Index:
FACU
Physiognomy:
Nt P-Vine
B. S. Walters
Unlike H. japonicus, this species is a perennial vine, and consequently it persists and spreads long after cultivation at old homesites and similar places where it was once grown. Some of our records from floodplains, thickets, and lowlands doubtless represent native occurrences, but the original native range of hops in Michigan is obscure. Most of our records probably represent plants persistent or spread from cultivation: the Eurasian var. lupulus as defined by Small, with the main leaf veins beneath glabrous or sparsely pubescent. There is a gradation to our native varieties, which are not themselves clear-cut: var. pubescens E. Small has the midrib beneath densely pubescent and has hairs between the veins, such plants occurring in the southernmost Lower Peninsula; var. lupuloides E. Small is less pubescent, but not as glabrate as var. lupulus. Most plants of these varieties have on the midrib beneath a few of the broad-based, very short, stiff, 2-hooked barbs (“climbing hairs”), which are especially characteristic of the petioles.