298 



WEEDS AND USEFUL PLANTS. 



1. U. dioi'ca, X, Leaves ovate-lanceolate, conspicuously acuminate, cor^ 



date at base, coarsely and acutely serrate ; flowers often dioecious, in 



clustered paniculate spikes longer than the petioles. 



Dioicous Urtica. Nettle. Stinging-nettle. 



Fr. Grande Ortie. Germ. Die Brennessel. Span. Ortiga. 



Root perennial. Stem 2-3 feet high, obtusely 4-angled, brcanching, very hispid. Leaves 

 2 or 3-5 inches in length ; petioles half an inch to 2 inches long, hirsute ; stipules linear- 

 lanceolate. Flowers small, in interrupted clusters, on slender axillary branching hispid 

 spikes. 



About houses, waste places, &c. : introduced. Native of Europe and Asia. Fl. June- 

 Aug. Fr. Aug. -Sept. 



ISO 188 



2. JJ. u'rens, L. Leaves elliptical or ovate, coarsely and deeply serrate 

 with spreading teeth ; flowers in simple capitate clusters, on peduncles, 

 shorter than the slender petioles. 



Fig. 187. The small Stinging-nettle (Urtica urens). 188. A staminate floAver. 189. A 

 pietillato one, both enlarged. 



