302 PITTONIA. 
PARONYCHIA PUSILLA. Annual, 14—3 inches high, parted 
to the base into a few slender ascending branches, these with 
many short distichously arranged branchlets; the whole 
plant canescent with a minute pubescence whieh, under a 
strong lens, appears stiffly setulose, some of the setulz appear- 
ing uncinate at tip: leaves oblong-lanceolate, acute, sessile, 
only a line and a half long: stipules ovate, minute (invisible 
except under a lens) : flowers sessile, crowded in all the axils, 
minute, the sepals only a half-line long: seed black, smooth 
and lustrous. 
The habitat of this perhaps very local plant is as singular 
as the species is peculiar. I gathered about a dozen speci- 
mens of it (all I could find), on an isolated mass of rock, 
scarcely three feet high or ten in breadth, which rises up in 
the midst of the grassy valley of a streamlet among the low 
hills a mile or two west of Bethany Station, on the lower San 
Joaquin, California; the date, April 30th, 1889. No other 
outcroppings of rock or ledge occur anywhere near the place ; 
but the species may possibly recur in the Mt. Diablo foot- 
hills whieh begin a few miles to the westward. 
CENOTHERA LEPTOCARPA — Eulobus Californicus, Nutt., 
Torr. & Gray, Fl.i.515; CE. Californica of page 290 supra, 
not of Watson. The disk lining the calyx-tube is even less 
manifest in this, the type of Eulobus, than in CE. crassiuscula, 
as I observe from living plants now in flower in the garden 
of the University ; so that the pendent-pods are the only 
thing left to distinguish the present plant from the species of 
CEnothera next of kin to it. Let him who would sustain 
Eulobus on this ground, separate our western species of 
Arabis into two genera for the same reason ; and the same 
with Thelypodium and several more. 
GREENELLA' RAMULOSA. Perennial, suffrutescent, intricately 
Pals e C er MEMEO SES SY cee Oe ee 
|! GREENELLA, Gray, Proc. Am. Acad. xvi. 80; Syn. Fl. vol. i. part 2, 
55, 164. 
