VOL. I. | Naturalized Plants. 525 
termediate ones, where they seem quite at home, and may be fairly 
included among our exotic plants. Apparently they are an intro- 
duction not to be regretted. Their handsome sagittate leaves and 
white flowers are a pleasing addition to the vegetation ot the brook- 
sides, and the tubers may be of some economic value. 
The bright little pimpernel ( Anxagallis arvensis ), which has spread 
nearly around the world, is increasingly common with us. In the 
books it is said to prefer dry and sandy soils, but here it is most 
abundant and vigorous in the heavy adobe of damp meadows. The 
usual form is. red-flowered, but at Fallbrook, near San Diego, Mr. 
Cleveland has collected it with blue flowers. 
None of the European mulleins so widely naturalized on the At- 
lantic side of the continent have yet appeared on this, but an addi- 
tional species, Verbascum virgatum, not elsewhere known in the 
United States, occupies a limited region near Pasadena, in Los An- 
geles County. It is to be found at the old Dalton Ranch and in 
abundance under open groves of oaks on the hills about Lamanda 
Park, where it often attains a height of six feet. Its introduction 
was probably by way of Mexico, and during Mexican rule. 
Hoarhound, Marrubium vulgare, infests every roadside through- 
out the settled valleys of the southern counties, and extends well up 
the slopes of the arid foothills. Yet although now so omnipresent, 
there is some reason for believing that it was rather scarce at the time 
of the American settlement of the country. Old inhabitants tell of 
seeking it and bringing home roots to plant, so that it might 
be at hand for use as a domestic remedy, a precaution its present 
abundance would render needless. Last summer local newspapers 
reported a carload of the dried herb exported eastward. 
The introduction of Datura Tatula is directly traceable to the es- 
timation in which its leaves are held as a remedy for asthma. More 
than twenty years ago a sufferer from this disease planted the seed 
near Kehl’s Mill, and the plant still continues to propagate itself at 
that place. In that length of time it has spread over only about an 
acre of ground, and does not seem disposed to extend its limits, al- 
though the adjoining land is equally adapted to its growth. 
Physalis equata, a Mexican member of the same order, is widely 
diffused, being an abundant weed in orchards and gardens, where in 
rich soil it forms a stout plant three feet high. As it is unarmed it is 
less obnoxious than some other solanaceous species. Such a one is 
