138 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 31) Ser. 



Farther in the interior, from Sonoma County (Sebasto- 

 pol) to the Sacramento Valley, and south along the foot- 

 hills and higher plains of the east side of the San Joaquin 

 Valley, a second form grows, exactly like the type except 

 that it is tall and slender. This is the form commonest in 

 the Sacramento and San Joaquin plains. By slight grada- 

 tions through a multitude of forms, a dark eye develops, 

 and the habit becomes more luxuriant, until we have C. 

 luteiis var. citrinus. 



y 28a. C. luteiis var. citrinus. This variety is merely a color variation of 



that which follows, the color varying from yellow to deep lemon, and the 

 central spot being darker and not oculated. 



This variety is found at its best in the Russian River 

 region from Hopland, Mendocino County, to the town of 

 Sonoma, in Sonoma County. In the latter place, the color 

 is a deep citron and the eye has disappeared. At various 

 other points, for example, eastern Lake County, Linden 

 (San Joaquin County), near Placerville (El Dorado 

 County), and in various localities in the foot-hills of the 

 Sierra this form is approached. 



'' -i^b. C. luteus var. oculatiis. This variety is usually much taller, larger 



flowered, and often many flowered; petals white to lilac or purple, often 2 

 inches long, the same in width, the center of each showing an oblong dark 

 brown spot oculated with yellow, and many radiating pencilings; sepals also 

 oculated. 



The type of C. luteus var. oculatus as above described is 

 common in the Coast Range from Shasta County to San 

 Francisco Bay. It is to be expected that it would occur as 

 far south as Monterey County, but the writer has seen no 

 specimens from that region. 



In the foot-hills of the Sierras, from Butte to Kern coun- 

 ties, there is a form slightly differing from the type. The 

 petals have less yellow in the middle third, the blotch is 

 smaller, the gland rather deltoid than lunate, and the pen- 

 cilings are lighter — all trifling differences which only close 

 study will detect; yet they are qui e sufficient to separate 

 the oculatus of the Coast Range fron^. that of the Sierras. 



C. luteus var. oculatus of the Sierra foot-hills is very con- 

 stant. While in some localities it crosses with var. citrinus, 



