210 CALIFORNIA ACADEMY OF SCIENCES. 



Lyonothamxus asplenifolius, Greene. 



Not common. The trees are small and often distorted by 

 ilie wind. This species always forms small groves of a hun- 

 dred more or less trees. It sends up several trunks from 

 one crown, and the whole grove probably is connected un- 

 derground by its roots. 



Heucheea pilosissima, Fisch. & Meyer. = R. maxima, 

 Oreene. 



Not uncommon throughout Santa Cruz Island and very 

 abundant in the caiions of Santa Rosa. When growing 

 amongst bushes on Santa Cruz the flowering stems reach a 

 iieight of five feet. On sun-exposed rocks it is often not 

 more than six inches high. 



Till^a minima, Miers. 

 Cotyledon lanceolata, Watson. 

 (Enothera bistorta, Nutt. 



<Enothera dentata, Cav. 



<Enothera cheiranthifolia, Horn. 



Many forms, one of which is E. iiifkJa. Greene. 



Zauschneria Californica, Presl. 



Oodetia quadrivulnera, Spach. 



Clarkia elegans, Dougl. 



Mentzelia micrantha, Torr. k Gray. 



EcHiNOCYSTis fabacea, Naudin. 



The plants of both Santa Cruz and Siinta Rosa Islands 

 seem to be this species rather than E. vi'icrocarpa. They 

 jmature either four or eight large seeds. 



Opuntia Engelmanni, 8alm., var. (?) littoralis, Engelm. 



