SCIENTIFIC AND POPULAR. 397 



a. W. Cldytoiii (Michx. ) Brit. (M. Claytoni Michx., O. brevisty- 



lis DC). Canada to N. Carolina and Nebraska. Woolly 

 Sweet Cicely, Hairy Sweet Cicely, Sweet Chervil or Jarvil. 

 See Myrrhis. 



b. W. longistylis (Torr.) Brit. (M. longistylis Torr., O. longisty- 



lisDC. ). Canada to Alabama and Texas. Smoother Sweet 

 Cicely, Anise-root, Sweet Anise, Sweet Chervil or J arvil, Cicely- 

 root. Root aromatic, carminative, stomachic. 



2116. WEDELIA, Jacq. 1760. Niebuhria. Compositae. 



Named for Prof. G. W. Wedel of Jena, 17th Century. Syn. 

 Niebuhria, Neck. 1790, not DC. 1824 (Kew) nor Scop. 1777. 

 Herbs and undershrubs, mostly littoral. About 50 species, 

 warmer regions of Old and New World; 1 in U. S. [Wedelia, 

 Loefl. 1758 is a genus of Nyctaginaceae, in Index Kewensis 

 united with AUionia, Loefl. 1758. Heller catalogues one spe- 

 cies, and one also of the foregoing.] 



2117. WHIPPLEA, Torr. Whipplea. Saxifragaceae. 



SufFrutescent plants. Two species, Pacific border of U. S. 



2118. WHITNEYA, Gray. Whitneya. Compositae. 



Named for Josiah D. Whitney of Cal. Geological Survey. 

 Low perennial herb with aspect of Arnica. One species, Cali- 

 fornia. ^ 



2119. WILLUGHBAEA, Neck. 1790. Mikania. Comp<»sitap. 



Named for Francis Willoughby, English naturalist, d. 1672. 

 Syn. Mikania, Willd. 1804; Eupatorium, in part. Herbaceous 

 vines, some shrubs, with suiall discoid tiower-heads. About 

 150 species. New W^orld; 2 in U. S. 



a. W. scdndens (L. ) Kze. (E. scandens L., M. scandens Willd. ). 

 Ontario and eastern U. S. Climbing Hemp-weed, Climbing 

 Boneset. 



2120. WISLIZENIA, Engelm. Wislizenia. Capparidaceae. 



Annual herbs. Two species, Mexican border of LJ. S. 



2121. WISSADULA, Medic. Wissadula. Malvaceae. 

 Hoary shrubs. About 8 species, tropical, all but one of New 



World; 2 in U.S. 



2122. WITHANIA, Pauquy 1824. Withania. Solanaceae. 



Syn. Physaloides, Moench 1794, not PhysalodeSjBoehm. 1760. 

 Hoary or woolly shrubs. Four species, Mediterranean region 

 and southern Asia. 



a. W. coagiilaus Dun. India. Fruit used as a substitute for ren- 

 net in making cheese. 



2123. w6lFFIA, Horkel. Wolffia, Duckmeat. Lemnaceae. 

 Named for N. M. von Wolft^ Polish naturalist, d. 1784. 



Plant consisting of a minute floating thallus. About 12 species; 

 3 in U. S. The smallest of flowering plants, except the following. 



