402 Index to American botanical literature 



Villani, A. Dei nettarii delle Crocifere e del loro valore morfologico 

 nella simetria fiorale. Malpighia 19 : 399-439. 1906. 



Watson, W. Yucca nitida (Wright, MS.). Gard. Chron. III. 39: 

 154, 155. 10 Mr 1906. 



Described as a new species of doubtful validity, closely related to K Whipplei. 



Weed, C. M. The beautiful laurels. Forest & Stream 66 : 909. 9 Je 

 1906. [Illust.] 



Weiss, H. F. The structure and development of the bark in the 

 sassafras. Bot. Gaz. 41 : 434-444. f. 1-8. 30 Je 1906. 



Wiegand, K, M. Pressure and flow of sap in the maple. Am. Nat. 



40: 409-453- 9 J e *9° 6 - 

 Wiegand, K. M, Some studies regarding the biology of buds and 

 twigs in winter. Bot. Gaz. 41 : 373-424./. 1-8. 30 Je 1906. 



Wildeman, E. de. Pleurothallis Barbosana, nov. sp. Gard. Chron. 



III. 39 : 244. 21 Ap 1906. 



Native of Brazil. 



Willis, E. Sketch of the life of Dr. J. L. E. W. Shecut and of the 

 origin of the Museum. Bull. Coll. Charleston Mus. 2 : 27-32. Ap 



* 



1906. 



Witasek, J, Die chilenischen Arten der Gattung Calceolaria, Oesterr. 

 Bot. Zeits. 56: 13-20. Ja 1906. 



Diagnoses of 19 new species. 



Yamanouchi, S. The life history of Polysiphonia violacea. Bot. Gaz. 

 41 : 425-433- 3° Je 1906. 



