1 64 Nettle ( Urticacecz). [No. 24 



Found, in rich woods from Pennsylvania to Georgia, and 

 west to Minnesota and Kansas. 



A woody vine with twining stems, sometimes two inches 

 thick, that climb to a height of thirty or forty feet ; very 

 ornamental and useful in cultivation for arbors and screens. 

 The root is aromatic and stimulant like ginger. 



No. 24. Family URTICACE^. (Nettle Fam.) 



Genus HUMULUS, L. 

 Fig. 80. Hop. H. Lbpulus, L. 



Flowers, small, greenish, in clusters. The staminate and 

 the pistillate forms are in different plants ; the stamin- 

 ate, with five sepals and five erect stamens opposite 

 them, in loose very many-blossomed clusters from the 

 axils of the leaves ; the pistillate, with one sepal, which 

 is wrapped around the seed-case, in short spikes with 

 large scales. June, July. 



Leaves, variable, usually two to four inches in length, sim- 

 ple, opposite, toothed, and mostly three- or five-lobed, 

 very rough backward on the upper surface. Stipules, 

 persistent. 



Fruit, one-celled, one-seeded. An achene wrapped in the 

 enlarged scale-like calyx. 



Found, only in rich soil, from New England westward, 

 and southward in the mountains to Georgia. Also, 

 extensively in cultivation for the markets. 



