62 ERYTHEA. 
The above letter, from my friend in Australia, explains 
itself; but I have to add by way of comment, that I had from 
him nearly two years ago, an intimation that our American 
Jussiea was not J. repens; and, in the Flora Franciscana 
(page 227) I acceded to his proposition that we have in 
North America only the J. diffusa. But, since the separating 
of Jussica from Ludwigia has no warrant at all, from a 
phytological point of view, I have treated them, in as far as 
I had to do with them in the Flora Franciscana, as one genus, 
under the older name, Ludwigia, retaining the specific name 
assigned by Forskaal. The California plant, just like that of 
the Atlantic slope, has always a pure yellow corolla. 
Linneus’ brief conventional diagnosis of J. repens is, of 
course, entirely useless; and, as my correspondent suggests, 
we must go back to the pre-Linnzxan founders of the species, 
in order to find the real characters of the Indian type; but 
perhaps the fullest description of true repens, accompanied 
by an excellent plate, was given by Dr. Wight in the third 
volume of Hooker’s Botanical Miscellany, page 300, plate 40. 
Epw. L. GREENE. 
STUDIES IN CALIFORNIAN UMBELLIFERZ.—ILI. 
By Wiuus L. Jepson. 
Eryngium aristulatum. Prostrate, very slender, the 
stems 10 to 16 inches in length: radical leaves long petioled, 
the short blade spinose-toothed and with a few lanceolate 
segments; cauline leaves opposite, sessile, spinulose-serrate: 
heads very numerous, 3 lines in diameter; bracts exceeding 
the head, about 5 lines long, spinescent at base; bractlets 
spinose, the body narrowly lanceolate, inversely sagittate- 
winged from the base upwards, the lobes of the wings thus 
forming sinuses in each of which are borne 1 to 3 awns, 
surpassing the breadth of the wing: calyx-lobes hyaline- 
margined, cuspidate, exceeded by the long styles. 
