CHAPARRAL COVER, RUN-OFF, AND EROSION 



813 



distribution, ckstructiojT of seed by birds, and the severity and heat 

 generated by the fire in passing over the area and in burning the 

 litter. The following list of species is not complete, as many plants 

 were not seen in flower and were not identified by the grosser char- 

 acteristics. The occurrence of the species is indicated by the symbols 

 A, C, O, standing for Abundant, Common, or Occasional. Species 

 which might be classed as Rare were omitted from the list as they 

 might later become more abundant. Those marked with a small circle 

 (degree mark) are from roots, corms. or underground stems and 

 not from seed. 



A Gymnogramma triangularis° Kaulf. 



C Pellaca andromcdacfoUa Fee. 



C Stipa coronata Thur. 



O Muhlcnbergia sp. 



O Koeleria cristata Pers. 



O Poa scahrcUa Benth. 



O Festiica sp. 



C Bromtis hordacens Lim. 



C Bromns riibcns Lim. 



A Brodiaca capitata° Benth. 



O Brodiaca crocea Covill. 



O Iris hartwegii" Baker. 



C Eriogonum fasiculatum Benth. 



C Erodiuin cicutarium L'Her. 



O Paeonia broziiiii Doyl. 



O Delphinium parryi Gray. 



O Argcmone platyceras Link. 



O Platystemon californicus Benth. 



C Eschscholtsia californica° Cham. 



O Lepidium nitidum Nutt 



A Adenostema fasiculatum H. & A. 



A Lupinus igrayi?)° Wats. 



C Lupinus sp. 



C Lathyrus latrtiflorus Greene. 



C Hosackia sp. 



A Hosackia glabra Torr. 



C Vicia sp. 



C Arctostaphyllos pa tula Greene. 



C Oenothera sp. 



C Ceanothus crassifolius Torr. 



O Sidalcca sp. 



O Convolvulvas occidentalism Gray. 



O Gilia sp. 



C Echenocystis macrocarpa Greene. 



C Phacelia sp. 



O Audibertia polystachya Parish. 



O Solanum xanti Gray. 



O Pentstemon sp. 



C Castilleja foliolasa H. & A. 



C Hasardia squarrosa Greene. 



O Erigcron foliosus Nutt. 



O Achillea lanulosa Lim. 



From the burned area samples were taken in October, 1919, of eroded 

 soil and litter found in the small alluvial cones where changes in 

 gradient occurred, of the heavily burned and badly washed soils, and 

 of non-eroded litter and soil in nearby areas of unburned brush. These 

 samples were carefully sown and watched during the winter of 1919- 

 lii'-iO and tlu- plants given in the following table were known. A few 

 cases are given where there is some doubt as to species, though the 

 great abundance of a species on the area made it certain that these 

 were the same. 



