28 Naturalized Plants. [ZOE 
will be very troublesome. This is the first recorded appearance of 
this plague in California, although it is probably to be found in other 
parts of the State. 
Observing the beginnings of such evils one is impressed by the 
ease with which their spread might be prevented by prompt action. 
But this is taken with neither vegetable nor animal pests. Indeed 
their character is not at first realized, and it is only after their rav- 
ages become disastrous that efforts, always costly and too often in- 
effectual, are made for their extermination. Much of this might be 
prevented by an intelligent supervision which would detect and 
stamp out these plagues before they had time to spread; but it is 
doubtful if such a supervision could be provided or successfully ex- 
ercised. 
The garden dill, Peucedanum graveolens B. & H.,* the appear- 
ance of which as an escape at Los Angeles has already been record- 
ed in these notes,+ I have observed during the past summer in great 
abundance by roadsides and in fields in some of the environs of San 
Bernardino, so that it may be regarded as fully established. A/entha~ 
Piperita also grows abundantly by the banks of several streams in. 
the city limits of the same town. 
Sisymbrium acutangulum is reported in the Botany of California 
to be found about the “older towns from San Francisco to Los An- 
geles.’’ The southern range, I am informed by Dr. Watson, rests’ 
on specimens collected in 1860-62 by Brewer, ‘‘ back of Santa Bar-. 
bara and Los Angeles.’’ Later collectors have not found it, nor is 
it known to resident botanists of either place as now growing at 
them. It is therefore doubtful if it is at present an inhabitant of our — 
region. 
Veronica peregrina exhibits here the same dubious character that 
it possesses in most places where it is found in the United States. — 
_ It is not uncommon in neglected fields, and is occasionally seen by | 
roadsides, but I have yet to meet with it at a distance from cultiva- 
tion. . 
ESCAPES AND Watrs.—Many of the plants cultivated in field or 
garden are occasionally to be found growing spontaneously, and 
some have been included in floras. Such are lucerne, the garden. 
"Coulter & Rose, Bot. Gaz., xiv, 275. Anethum graveolens, L. 
: tZoe, i, ro, 
