PLANTS OF THE SAN BERNARDINO MOUNTAINS 215 



Dendromecon rigidum Benth. Trans. Hort. Soc. II, 1: 407. Bush Poppy 



Frequent on hillsides in the Lower Chaparral Zone. . 

 Argemone platyceras Link & Otto, Ic. PI. Rar. 1: 85, t. 43. 



Occasional in dry washes in the Chaparral and Piiion Zones, and rare 

 as high as 8000 feet altitude. 

 Eschscholtzia californica Cham, in Nees, Hort. Phys. Berol. 75: 15. 



Perennial California Poppy 

 Occasional in the Upper Chaparral Zone. Includes E. nitrophila Greene, 

 Pitt. 5: 240, abundant at Doble (Bear Valley), the type station. 

 Eschscholtzia minutiflora Wats. Proc. Am. Acad. 11: 122. 



A desert species which ascends the canons of the Lower Pinon Zone. 



CRUCIFERAE 



Draba corrugata Wats. Bot. Cal. 2: 430. 



On the summit of San Gorgonio Mountain, and in the Hudsonian island 

 in Snow Canon, Mil Creek. 

 Draba Douglasii Gray, Proc. Am. Acad. 7: 328. 



Rare on stony slopes. Bear Valley. 

 Athysanus pusillus Greene, Bull. Cal. Acad. 1: 72. 



A foothill species which ascends the Lower Chaparral Zone. 

 Thysanocai'pus curvipes Hook. Fl. Bor. Am. 1: 69, t. 18, f. A. 



Occasional on shaded hillsides in the Lower Chaparral Zone. 

 Thysanocarpus laciniatus Nutt.; T. & G. Fl. 1: 118. 



Occasional on shaded hillsides in the Lower Chaparral Zone. 

 Lesquerella sp. 



A single specimen, on a dry slope in open pine forest at Metcalfs (Bear 

 Valley), Chandler. 

 Lepidium bernardinuyn Ahrams, Bull. Torr. Club 37: 149. 



Bear Valley, type station. 

 Lepidium Menziesii DC. Syst. 2: 539. 



In sandy soil, Waterman Hot Springs, in the Lower Chaparral Zone. 

 Lepidium nitidwn Nutt.; T. & G. Fl. 1: 116. 



Occasional on hillsides in the Chaparral Zone. 

 Sisymbrium canescens Nutt. Gen. 2: 68. 



Occasional in dry soil in the Chaparral and Lower Transition Zones. 

 Sisymbrium incisum Engelm.; Gray, PL Fendl. 1: 152, t. 64. 



Frequent on the borders of shallow ponds in the Transition Zone. 

 Sisymbrium officinale Scop. Fl. Carn. ed. 2, 26. 



Frequent in dry soil in the Chaparral and Lower Transition Zones. 

 Naturalized fi'om Europe. 

 Erysimum asperum DC. Syst. 2: 505. 



Frequent on dry hillsides in the Chaparral and Transition Zones. 

 Radicula curvisiliqua Greene, Leaf!. 1: 113. 



Occasional on the borders of desiccating ponds in the L^pper Transition 

 Zone. 

 Radicula N asturtium-aquaticum Britten & Rendle, Journ. Bot. Brit. & For. 14: 

 99. Water Cress 



Occasional in streams in the Chaparral and Transition Zones. 



