6 SMITH: STUDIES IN THE GENUS LUPINUS 
may sometimes be necessary in order to establish that a certain 
variation is really the result of a diseased condition. Usually, 
however, an abnormal development is indicated by pronounced 
elongation or multiplication of some of the floral parts. One 
very interesting case is that represented by sheet 366288 in the 
U.S. National Herbarium (K. Whited 536, Ellensburg, Washington). 
In both specimens the flowers dissected have three wing-petals 
each, and in one all, the wing- and keel-petals are very abnormal 
in shape (Fic. 1). In the case of sheet 620193 (V. Bailey gz, 
NC ye 
es 
1 cm. 
Fic. 1. Lupinus SUBVEXUS FLUVIATILIS C. P. Smith. K. Whited 536 (US 
366288). 1. From specimen on right, 6, banner; w, wing ale like this); k, keel; c, 
calyx as seen from above; side view of entire blossom above. . From specimen on 
left: w, wing (two like this); ew, extra wing petal; k, keel; no fee present. 
Toppenish, Washington) the flowers are of the same narrow form 
and seemingly fruitful. 
SPECIAL ABBREVIATIONS 
The location of each specimen cited is indicated by an abbrevia- 
tion. The abbreviations used are as follows: 
DS, Dudley Herbarium of Stanford University; 
UC, herbarium of the University of California; 
ColU, herbarium of Columbia University; 
T, Torrey Herbarium (at New York Botanical Garden); 
NY, herbarium of the New York Botanical Garden; 
G, Gray Herbarium of Harvard University; 
US, United States National Herbarium 
PA, Philadelphia Academy of Arts and ‘Sciences: 
_ CPS, private herbarium of the writer. 
