SCIENTIFIC AND POPULAR. 385 



a. U. divaricdtuni (L. )Kze. (Urtica divaricata L., L. Canaden- 

 sis Gaud. ). Canada and eastern U. S. Wood Nettle, Canada 

 Nettle, Albany Hemp. Seeds and leaves alterative, expectorant, 

 counter-irritant. In India are found (b) U. crenulata (Roxb. S 

 Lyons ( Urtica crenuJata Roxb. ) aud(c)U. stimulsins (L. f. ) 

 Lyons ( Urtica stimulans L. f. ), both violently irritating' nettles, 

 as is (d) U. ferox (Blanco) Lyons (L. Gaudichaudiana 

 Wedd. ), Philippine Islands. 



2069. URYILLEA, H. B. K. UrviUea. Sapindaceae. 



Climbing shrubs. About 15 species, tropical America; 1 in 



U.S. 



2070. tJSNEA, (Dill.) Ach. Beard Moss, etc. Usneaceae. 

 Lichens with terete, often pendulous thallus, on rocks or 



trees. About 20 species; 6 in U. S. (a) U. bai'bata Ach. 

 Beard Moss, Tree-hair, Hanging Moss, Idle Moss, Maple Moss, 

 Necklace Moss, Tree Moss. Plant demulcent, expectorant. 



2071. USTILAGO, Pei-s. Smut, Bunt, &c. Ustllagineae. 



From Latin, "scorched" or "charred". Syn. Uredo, in 

 part. Fungi, parasitic on the tissues of living plants, (a) U. 

 maydis Leveille (Uredo maydis DC). Parasitic on maize. 

 Corn-stinit, Maize-smut, Corn Ergot; Ger. Maisbrand, Beulen- 

 brand; Fr. Ergot de Mais; Sp. Rizon de Maiz. Fungus has 

 properties of Ergot. 



2072. UTRICULARIA, L. Bladderwort. Leiitibulariaceae. 



From Latin; a little "bag" or "bladder". Aquatic herbs, 

 the leaves bearing vescicles. About 150 species, widely dis- 

 tributed; 20inU. S. 



a. U. Tulgaris L. (U. macrorhiza LeConte), Europe, Asia and 

 North America. Greater Bladderwort, Common Bladderwort, 

 Bladder-snout, Hooded Water-milfoil, Pop-weed. The syn- 

 onyms applied also to oiher species. 



2073. UVULARIA, L. Bellwort, Wild Oat, etc. Melanthaceae. 



From Latin uvula, alluding to pendulous flowers. Syn. 

 Oakesia, in part. Herbs from perennial root-stocks. About 6 

 species, N. America; 4 in U. S. (a) U. perfoliata L., Cana- 

 da and eastern U. S., Perfoliate or Mealy Bellwort, is called 

 Mohawk-weed; (b) U. sessilifolia L. (O. sessilifolia S Wats. ), 

 Canada and northeastern U. S., Small or Sesbile-leaved Bell- 

 flower, is called Straw Lily. 



2074. YACCARIA, Medic. Cow-herb, etc. Caryopbyllaceae. 



From Latin, "cow" plant. Syn. Saponaria, in part. An- 

 nual with small red or pink flowers. About 3 species, Europe 

 and Asia. 



a. V. Vaccaria (L. ) Britton (S. Vaccaria L., V. vulgaris Host.). 

 Europe and northern Asia, nat. in U. S. Cow-herb, Cow Basil, 

 Cockle, Field Soapwort. 



2076. VACCiNIUM,L.Whortleberry,IIuckleberry,etc.Ericaceae. 

 The Latin name. Sjn. Metagonia, in part. Shrubs, some 

 arborescent, many producing edible berries. About 125 species, 

 widely distributed; 30 in U. S. 



