January 20, [911 



' 39 



sufficient to determine any plant; but an occasional plant of L. 

 tricolor was found with the lower calyx lip three-toothed and the 

 whole plant more hirsute, so that I was tempted to wonder if 

 such specimens could be actual hybrids of the two species. I 

 have now abandoned such thought. 



Pacific Grove, Monterey county, 24 June, 1906, / voy, 23 

 June, 1907, rjjS; Cemeteries, San Mateo county, 26 April, 1908, 

 ///v, T423. 



Figure 20. L'pperrow: Lupinus sp. Lower row: Lupinus polycarpus. 



Lri'ixrs sp. (Figure 20, upper row.) 

 A very interesting species was found in a grain field along 

 the San Francisquito creek, near Stanford University, associated 

 with L. vallicola apricus^ which greatly predominated. It oc- 

 curred in two notable color variations — pure patches each of 

 bine and pink flowered plants being scattered here and there 

 within the limited area occupied by the species. As to the 

 mere difference in color, the explanation seems easy. The nor- 

 mal blossom is bright bine wtih definite purple areas. In the 

 pink or semi-albino flower the bine is entirely absent and the 

 lavender-pink spots correspond exactly with the purple (or vio- 

 let) spots of the normally pigmented blossom, white taking the 



