18 SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 
Flora of Clifton, Arizona. II.* 
BY A. DAVIDSON, C. M., M. D. 
CRUCIFERAS. 
Draba cuneifolia Nutt. Clifton. May. 
Thysanocarpus filipes Greene. Canyon near Coronado Mine. 
This plant grows but sparingly in this place, and no 
trace of it has been observed in adjacent places at a like 
altitude. 
Lesquerella purpurea Wats. In shady canyons, flowering all 
summer. . 
Lesquerella gordoni Wats. Abundant on the plains in spring. 
Dithyrea wislizeni Engelm. Sands of the Rivers Frisco and 
Gila. April. 
Thalapse alpestre [L. Shaded rocks, Chase Creek.. April. 
Lepidium lasiocarpum Nutt. Railway bank near Guthrie, 
probably introduced. 
Lepidium montanum Nutt. From Dunean to Lordsburg and 
eastward, common. September. 
Lepidium medium Greene. Clifton. April. 
Sisymbrium canescens Nutt. Common. April. 
Sisymbrium incisum Engelm. Common. May. 
Nasturtium terrestre hispidum F. and M. Guthrie. April. 
Dryopetalon runcinatum Gray. Shady ravines. May. 
Arabis holboellii fendleri Wats. Rocky canyons. March. 
Thelypodium wrightii Gray. Frequent in the higher ravines. 
July. 
Thelypodium linearifolia Wats. Above Metcalf. September. 
Thelypodium micranthum Wats. Metcalf and Blue River. 
September. 
Streptanthus carinatus Wright. Occasional in the canyons. 
April. 
VIOLACE A. 
Ionidium polygale folium Vent. Blue River. September. 
CAROPHYLLEA. 
Cerastium texanum Britton. Metcalf. May. 
Arenaria saxosa Gray. Coronado canyon. Flowers all summer. 
Silene antirrhinum LL. Frequent. April. 
*List of Plants. Continued from Vol. III, No. 7, Oct., 1904, p. 111. 
