DIVISION EIGHT — SCIENCE. 635 



LEPIDIUM Linn. Pepper-grass. 



L. INTERMEDIUM Gr. Com. below 1800 feet. April — ^June. 



L. NITIDUM Nutt. Com. below 1800 feet. February — April. 

 BURSA Sieg. 



B. PASTORis (Linn.) Wigg. Com. below iSoo feet. March— June. 

 SISYMBRIUM Linn. 



S. CANESCENS Nutt. O. K., A. S., plains adjacent to S. G. Mts. February— April. 

 BRASSICA Linn. Mustard. 



B. CAMPESTRis Linn. Com. below 1500 feet. February — April. 

 B NIGRA I, Linn.) Kochz. Com. below 2000 feet. April — ^June. 



ERYSIMUM Linn. 



E. ASPERUM (Nutt.) DC. A. S., canyons of San Gabriel Mts. February— April. 

 NASTURTIUM R. Br. 



N. OFFICINALE R. Br. (Water-cress) Abundant in A. S. and at O. K. 

 CARDAMINE Linn. 



C. GAMBEUI Wats. Oak Knoll. May — July. 



C. INTEGRIFOLIA (Nutt.) Greene. O. K., A. S., M. C. February— April. 

 STREPHANTHUS Nutt. 



S. HETEROPHYi,i,us Nutt. Hills near Arroyo Seco. March — April. 

 ARABIS Linn. 



A. GLABRA (Linn.) Wein. Hills near Arroyo Seco. March — April. 



A. HOLBOELLii Hornem. Com. in San Gabriel Mts. April— June. 

 ALYSSUM Linn. 



A. MARiTiMUM (Linn.) L. Am. Com. along streets. 



ViolacecE. 

 VIOLA Linn. Violet. 



V. PEDUNCULATA T. & G. O. K., A. S., Las Casitas. February— April. 



CistacecE. 



HELIANTHEMUM Tourn. Rock-Rose. 



H. SCOPARiUM Nutt. Common on dry hills below 4000 feet. — April — June. 



Lythracece . 

 LYTHRUM Linn. 



L. CALiFORNicUM Torr & Gr. O. K., A. S. April— June. 



Malvacea. 

 MALVA Linn. Mallow. 



M. PARViFLORA Linn. Common below 2000 feet. February — April. 

 SIDALCEA Gray. 



S. DELPHiNiFOLiA (Nutt.) Green. Oak Knoll. February^May. 



Gera^iiacece. 

 GERANIUM Linn. Cranesbill. 



G. CAROLiNiANUM Linn (Wild Geranium.) O. K., A. S. March — May. 

 ERODIUM L'Her. Storksbill. 



E. CICUTARIUM (Linn.) L'Her. (Alfilaria) Common below 2000 feet. January — 



June. 

 E. MOSCHATUM (Linn.) L'Her. (Alfilaria) Com. below 2000 feet. January — June. 



OXALIS Linn. Wood-Sorrel. 



O. CORNICULATA Linn. Frequent along streets. 



A nacardiacecE . 

 RHUS Linn. Sumach. 



R. DivERSiLOBA T. & G. (Poison sumach. "Poison Oak") O. K., A. S., S. G. Mts. 



April — May. 

 R. INTEGRIFOLIA B. & H. Com. in unbroken soil below 4000 feet. March — May. 



