206 CALIFORNIA ACADEMY OF SCIENCES. 



II. FLORA OF SANTA EOSA ISLAND. 



The collection of Santa Rosa plants herein enumerated 

 was made during the first ten days of June. The early 

 vegetation had already disappeared and the Island had as- 

 sumed the dry apf)earance common to western California 

 after the spring rains have passed. Only the eastern and 

 northern parts were visited, and doubtless an examination 

 of the whole island earlier in the season \\ ill add a large 

 number of species to its flora. 



To the owner of the island — Mr. Alexander P. More, a 

 member of this Academy — for opportunity to make the col- 

 lection and for facilities given, I am very greatly obliged. 



Clematis ligusticifolia, Nutt. 



On Santa Cruz Island the flowers of some plants are per- 

 fect, and the vines become three inches in diameter. 



Ranunculus Californicus, Benth. 



Delphinum Parryi, Gray. 



EscHSCHOLTzrA Californica, Cham. =E. glauca, Greene. 



Eschscholtzias are very abundant on both Santa Rosa 

 and Santa Cruz Islands, and the plants not only differ in 

 habit, color of foliage and of flowers, but the same plant 

 sometimes undergoes an almost specific change in general 

 appearance. Tall, large plants on Santa Cruz Island, hav- 

 ing very glaucous foliage and graceful habit, by the end of 

 April had become stiff and branching, had assumed a red- 

 dish brown color throughout, and the flowers had changed 

 from light yellow to deep orange. The color of the plants 

 seems to depend somewhat upon the moisture of the soil, 

 as is shown by a gradation from the glaucous ones near the 

 bottom of canons to the red-brown ones of the dry sides. 

 On the loose soil of steep slopes the same plant seems to 

 persist as an annual and become E. peninsularis, Greene. 



