NO. 3 DUNKLE : PLANT ECOLOGY, CHANNEL ISLANDS 329 



Astragalus Traskiae Eastw. Trask's Astragalus. 



Suffrutescent perennial. Common on western and northern, wind-swept 

 breaks of the ridge and western bluffs. Also on San Nicolas and San Cle- 

 mente islands. A. Nemnii Gray and A. leucopsis (T. & G.) Torr. have 

 also been reported from Santa Barbara but not verified. Insular endemic. 

 GERANIACEAE 



Erodium Botrys Bertol. Broad-leaf Filaree. 



Annual. Reported only by Bond. Also on Santa Rosa Island; mainland. 

 Introduced from Europe. 



Erodium cioutarium (L.) L'Her. Red-stemmed Filaree. 



Annual. Abundant on terraces, the ridge, and bluffs. On all the islands; 

 mainland. Introduced from Europe. 



Erodium inoschatutn (L.) L'Her. White-stemmed Filaree. 



Annual. Occasional on northern canyon exposures. On all the islands, except 

 Anacapa; mainland. Introduced from Europe. 



MALVACEAE 



Mal<va par'viflora L. Cheese-weed. 



Annual. Widespread and locally abundant on terraces, the ridge, and head- 

 lands. On all the islands except Anacapa; mainland. Introduced from Europe. 



CACTACEAE 



Opuntia prolifera Engelm. Coast Cholla. 



Succulent shrub. Common on southern, eastern, and western bluffs. On 

 all the islands, including Guadalupe, except San Miguel and Santa Cruz 

 islands; mainland coast south to Baja California. Probable element of early 

 Mexican invasion; endemic to areas of southern California and Baja Cali- 

 fornia maritime climate. 



Opuntia littoralis (Engelm.) Cockerell. Coast Prickly Pear. 



Succulent shrub. Common on eastern terrace and southwestern bluffs. On 

 all the islands; mainland south to Baja California. Probably of Mexican 

 affinity; endemic to areas of southern California and Baja California mari- 

 time climate. 



ONAGRACEAE 



Oenothera cheiranthifolia Hornem. Beach Primrose. 



Perennial herb. Reported only by Hemphill. Also on San Nicolas, San Miguel, 

 Santa Rosa, and Santa Cruz islands; mainland coast from Surf north to 

 Oregon. Indigenous. 



CONVOLVULACEAE 



Convolvulus occidentalis Gray var. macrostegius (House) Munz. 



Giant Morning Glory. 

 Suffrutescent climber. Common on eastern terrace and canyons, in Coreopsis 

 association, and on southern bluffs. Reported from all the islands, but only 

 common and well developed on the southern islands, including Guadalupe. 

 Insular endemic. 



POLEMONIACEAE 



Gilia gilioides (Benth.) Greene. Blue Star Gilia. 



Annual. Occasional on northern canyon exposures and northern breaks. 

 Also on Santa Cruz, Santa Catalina, San Clemente, and Guadalupe islands; 

 mainland north to Oregon and east to Nevada. Indigenous. 

 HYDROPHYLLACEAE 



Nemophila racemosa Nutt. Pale Nemophila. 



Annual. Occasional on northern exposures of canyons. Also on Santa Cruz, 

 Santa Catalina, San Clemente, and Guadalupe islands; mainland coast to 

 Baja California. Endemic to areas of southern California and Baja California 

 maritime climate. 



Phacelia floribunda Greene. Flowery Phacelia. 



Annual. Common in shaded parts of canyons. Also on San Clemente and 

 Guadalupe Islands. Integrading with P. hispida Gray on Santa Barbara. 

 Insular endemic. 



Phacelia hispida Gray Hairy Phacelia. 



Annual. Occasional in canyon bottoms, and northern exposures, intergrading 

 with the preceding. Also on Santa Rosa, Santa Cruz, and Anacapa islands; 

 mainland to Baja California. Indigenous. 



