58 CALIFORNIA ACADEMY OF SCIENCES [Phoc. 4th Se«. 



TRANSITION ZONE— Continued 



Heuchera micrantha Dougl. 



Mitella diversifolia Greene 



Mitella ovalis Greene 



Saxifraga peltata Torr. 



Tellima grandiflora (Pursh) Dougl, 



Whipplea modesta Torr. 



Chamaebatia foliolosa Benth.* 



Crataegus rivularis Nutt. 



Fragaria californica C. & S. 



Fragaria californica crinita (Rydb.) Hall 



Fragaria chiloensis Duch. 



Fragaria virginiana platypetala (Rydb.) Hall C 



Geum macrophyllum Willd. 



Horkelia tenella (Wats.) Rydb. 



Horkelia tridentata Torr. 



Physocarpus capitatus (Pursh) Ktze. U 



Prunus demissa (Nutt.) Walp. U 



Rubus leucodermis Dougl. 



Rubus parviflorus Nutt. U C 



Rubus spectabilis Pursh 



Hosackia crassifolia Benth. U 



Hosackia macrantha Greene 



Lathyrus sulphureus Brewer 



Geranium incisum Nutt. 



Acer circinatum Pursh 



Acer macrophyllum Pursh* 



Ceanothus cordulatus Kell. C 



Ceanothus integer rimus H. & A. U 



Ceanothus palmeri Trel. 



Ceanothus prostratus Benth.* 



Ceanothus thyrsiflorus Esch. 



Ceanothus velutinus Dougl. C 



Viola lobata Benth. 



Viola sarmentosa Dougl. 



Angelica tomentosa Wats. 



Cicuta douglasii (DC.) C. & R. 



Coelopleurum maritimum C. & R. 



Aralia californica Wats. 



Cornus nuttallii Aud.* 



