102 ERYTHEA. 
Dr. Hasse may be added Pasadena and Los Angeles, a few 
plants having been observed in these places last season. 
Lolium perrenne, L. Ordinarily a casual in cultivated 
ground in this State; it is in one locality at least a well estab- 
lished plant, covering quite a space of ground in the wet soils 
of the cienega south of the city. It appears ranker and more 
silicious than that found growing on cultivated soils. 
Lolium temulentum, L. Not infrequent in waste places 
and grain fields; and along with it L. arvense, occasionally. 
Hordeum murinum, L. Unfortunately too common. 
Andropogon Sorghum, Brot. Primarily introduced as a 
fodder plant in cultivated soils; it has since remained with 
us, and in spite of cultivation is slowly increasing its range. 
Spergula arvensis, L. To the above list this species now 
falls to be added, having been discovered by Miss Merritt 
along the railroad track at Pasadena. As it is fairly abun- 
dant it has doubtless existed there for some time. 
The above list of 107 species, representing 27 genera, will 
seem like a large showing of adventive and naturalized plants 
for one county; especially in so new a country as California. 
The largest number belonging to any one natural family are 
the grasses; all the species of which here mentioned have 
been carefully identified by Dr. Vasey. In the number of 
species the Compositz come next in order, with 19 species. 
Of Crucifers there are 8; all the other orders being repre- 
sented by fewer species. 
How many of these 107 plants have been acquired to our 
flora since the publication of the Botany of the State Survey 
it will be impossible to determine; for it is by no means pro- 
bable that the collectors employed on that work recorded all 
the foreign plants then existing here. It is also manifest that 
several which Mr. Watson supposed to be aliens are natives. 
Such are at least two of the Mesembryanthemum species, aS 
the author of the Flora Franciscana has shown, and as I 
should certainly infer from the manner of their distribution 
in this county. Polygonum acre and P. nodosum, as well as 
Plantago hirtella are as surely indigenous. Omitting these 
