298 



WEEDS AND USEFUL PLANTS. 



1. U. dioi'ca, L. 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 Brenuessel. Span. Ortiga. 



Root perennial. Stem 2-3 feet high, obtusely 4-angled, branching, 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. Juiie- 

 Aug. Fr. Aug. -Sept. 



188 



2. U. 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). 

 pistillate one, botli enlarged. 



188. A staminate flower. 189. A 



