210 CALIFORNIA ACADEMY OF SCIENCES. 



Lyonothamnus asplenifolius, Greene. 



Not commoD. The trees are small and often distorted by 

 Ihe 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. 



Heuchera pilosissima, Fisch. & Meyer. = H. maxima, 

 Oreene. 



Not uncommon throughout Santa Cruz Island and very 

 abundant in the caiions of Santa Eosa. When growing 

 iimongst bushes on Santa Cruz the flowering stems reach a 

 height 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 cheiranthifglia, Horn. 



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



Zauschneria Californica, Presl. 

 G-ODETiA qdadrivulnera, Spach. 

 Clarkia elegans, Dougl. 

 Mentzelia micrantha, Torr. & Gray. 



Echinocystis fabacea, Naudin. 



The plants of both Santa Cruz and Santa Rosa Islands 

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

 jmature either four or eight large seeds. 



Opuntia Engelmanni, Salm., var. (?) littoralis, Engelm. 



