INTRODUCED PLANTS. 165 



5. Medicago minima, L. 



Not mentioned among California plants, but probably growing 

 there. As a plant of Southern Europe and Oriental Asia, it 

 may possibly have reached our locality with Turkish wool. 



6. Trifolium Macraei, H. & A. 



ONAGRACE.E. 



7. Clarkia rhomboidea, Dougl. 



8. Oenothera bistorta, Nutt. 



Abundant. 

 GEnothera bistorta, Nutt., var. Veitchiana, Hook. 

 Rare. 



COMPOSITE. 



9. Bseria tenerrima, Gray. 



10. Basria uliginosa, Gray. 



11. Chsenactis glabriuscula, D. C. 



12. Hemigonia rainosissima, Benth. 



13. Hypochseris glabra, L. 



14. Layia platyglossa, Gray. 



Much at home. Having a prettily colored daisy-like flower. 



15. Matricaria discoidea, D. C. 



" Apparently indigenous on the Pacific coast." 

 "Established in Northern Europe." 



16. Microseris Douglasii, Gray. 



Concerning this plant, Dr. Watson wrote me in 1879 : "A very 

 rare species having been collected only by Douglas himself, 

 over forty years ago." 



17. Xanthium spinosum, L. 



" Introduced from Chili" into California, doubtless by sheep. 

 Tropical America and Southeastern United States. 



18. Xanthium strumarium, L. 



Originally from Europe. Occasionally found in Eastern Massa- 

 chusetts. 



SCROPHULARIACE^. 



19. Mimulus brevipes, Benth. 



20. Orthocarpus purpurascens, Benth. 



LABIATE. 



21. Marrubium vulgare, L. 



From Europe. 



BORRAGINACEiE. 



22. Amsinckia spectabilis, F. & M. 



Very abundant. 

 12* 



