IMMIGRANT PLANTS IN LOS ANGELES COUNTY. 103 
from the catagory, there remain not less than 22 of the species 
of my list, which were not known to occur in California 
anywhere, at the time when the State Survey volumes were 
issued. They are the following: 
Brassica alba, Crepis biennis, 
Modiola Caroliniana, Bellis perennis, 
Meliloius alba, Convolvulus arvensis, 
Pastinaca sativa, Ipomea Mexicana, 
Coriandrum sativum, Nicotiana glauca 
Feniculum vulgare, olanum rostratum, 
piu raveolens, Eragrostis major 
Sonchus oleraceus, Bromus mollis, 
Verbesina encelioides, Setaria caudata, + 
Xanthium spinosum, Arundo Donax 
Melampodium perfoliatum, Andropogon Sorghum. 
Those the names of which are in italics may at this date be 
considered as naturalized in this region; for they exist in 
such numbers, and are so generally disseminated, that their 
future extinction is next to impossible. The others seem as 
if they had come in more recently; but among these the 
Bellis and Crepis are most likely to assume a permanent 
place in our flora of aliens. 
Sisymbrium officinale, Cotula australis, 
Spergula arvensis, Silybum Marianum, 
Apium graveolens, Plantago lanceolata, 
Senecio vulgaris, Lolium temulentum, 
Cotula coronopofolia, Lolium perenne. 
These have all now extended their range to at least the 
southern boundaries of the state, and all with the exception 
of Senecio vulgaris are well established; some of them even 
common. 
These lists illustrates very fully the great increase not 
only in the range but in the number of our plant immigrants. 
Their increase so far is but commensurate with the com- 
mercial and agricultural development during that period, the 
majority of the weeds having been introduced and encouraged 
by agricultural pursuits. Succeeding years shall no doubt 
us in possession of many others; and while it may seem 
