![]() ![]() This plant had not yet commonly escaped when most of the standard references were written, but Britton’s Manual of the Flora of the Northern States and Canada includes it in an appendix: These vines were growing in Bird Park in Mount Lebanon, where they were blooming in the middle of September. ![]() (Japanese hops are said to be poor for beer-making.) The male flowers, which stand up above the vines, are the ones you will notice in a large patch. Male flowers and female flowers are borne on separate plants the female flower clusters are similar to the ones on the familiar domestic hops ( H. It can cover a huge area quickly, and seems to be found more and more commonly in the Pittsburgh area. Easily mistaken at first glance for a wild cucumber, but distinguishable by the greenish (rather than pure white) male flowers and the deeply five-to-seven-lobed (rather than more shallowly five-lobed) leaves. In many ways an attractive vine, but a very invasive one, and all the harder to get rid of because it is covered with sticky prickles.
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