132 A INDEX TO RECENT LITERATURE 
Vail, A. M. Studies in the Asclepiadaceae—VI. Bull. Torrey Club, 
29: 662-668. f. 7-7. 30 D 1902. 
Includes three new species. 
Van Ingen,G. Chetlanthes lanosa at New Haven, Conn. Fern Bull. 
9: 7. Ja Igor. 
Voss, W. Neue Versuche iiber das Winden des Pflanzenstengels. Bot. 
Zeitung, 60: 231-252. p/. rz, 72. 31 D 1902. 
Wallace, J. The Preservation of our Wild Flowers, Shrubs and Trees. 
Plant World, 5: 238-241. D 1902. 
Watkins, W. G. Some Ferns of the Sierra Nevada Range. Fern 
Bull. 10: 68-70. Jl 1902. 
Weberbaur, A. Ueber die Frucht-Anatomie der Scrophulariaceen. 
Beih. Bot. Centralb. 10: 393-457. p/. i1go01. 
Webster, H. Remarks on Volvaria. Rhodora, 4: 5-7. 17 Ja1go2. 
Webster, J. R. | Crepis virens in Eastern Massachusetts. Rhodora, 
42 199... 18. O 1902. 
Weisse, A. Ueber die Blattstellung von Liriodendron tulipifera. Ber. 
Deuts. Bot. Gesells. 20: 488-493. f/. 237. 26 N 1902. 
Williams, E. F. Preliminary Lists of New England Plants. — VIII. 
Rhodora, 4: 15-22. 17 Ja Igoz. 
Williams, E. F. Two Noteworthy Cavices at Sudbury, Massachusetts. 
Rhodora, 4: 167, 168. g Au 1go2. 
Williams, T. A. Where Lichens Grow. Plant World, 5: 241-243- 
D 1902. ye 
Reprinted from Asa Gray Bull. 5: 77-79. 25 O 1897. 
Zahlbruckner, A. Diagnosen neuer und ungeniigend beschriebener 
kalifornischer Flechten. Beih. Bot. Centralb. 13: 149-163. 1902: 
New species and varieties in Arthropyrenia, Hassea (gen. nov.), Microglaena (2), 
Endocarpon (2), Dermatocarpon, Opegrapha, Arthonia (2), Platygrapha, Heppia (2); 
Psorotichia, Bilimbia, Lecidea, Lecania (2) and Acarospora (4). 
