98 
IMMIGRANT PLANTS IN LOS ANGELES 
COUNTY, CALIFORNIA.—ILI. 
By AnstrutHER Davipson, M. D. 
Anagallis arvensis, L. Very common in the early summer 
on the heavier and cultivated grounds near the coast. Though 
somewhat variable in color of flowers, no specimens resem- 
bling A. coerulea, Schreb., either in that regard or in the 
disposition of the glandular hairs have been found. 
Ipomeea Mexicana, Gray. An ornamental plant well 
established in many places. East of the river and in the 
fields southwest of Los Angeles it is quite frequent, and 
threatens to become, in process of time, a very troublesome 
weed. 
Convolvulus arvensis, L. A few years ago when I first 
observed this plant in an orchard near the University, it 
covered but a few yards of ground. Last season it ranged 
over ten times that area in spite of cultivation. The remark- 
able depth to which the roots descend makes it almost im- 
possible to eradicate it, while cultivation, ordinarily an 
efficient remedy, here only tends to multiply it. The sus- 
pension of cultivating processes in the autumn when this 
convolvulus is in its glory, likewise favors its increase, so 
that it is certain to become a very serious pest. 
Physalis equata, Jacq. f. Very common in the more 
fertile and cultivated soils. 
Nicotiana glauca, Graham. Primarily cultivated as an 
ornamental tree it is now well established throughout the 
city, along the river banks and other moist places. 
Solanum rostratum, Dunal. Margin of a pond at South 
Santa Monica, according to Dr. Hasse. 
Verbascum virgatum, Withering. Not abundant, though 
frequently met with in the woods along the San Gabriel near 
El Monte, and near Pasadena and Lamanda Park. 
Marrubium vulgare, L. Widely diffused in the valleys of 
the foothills, and frequently growing in masses so dense as to 
exterminate all other vegetation. 
