190 CALIFORNIA ACADEMY OF SCIENCES. 



pappus-bristles 5, slender, with a thin, triangular palea at 

 base. 



Santo Tomas, Lower California, July 1885. C. R. Orcutt. 

 A peculiar species in respect to the paleaceous pappus; in 

 other respects much like P. aurea, although a great deal 

 smaller, and more diffusely branching. 



Aplopappus jimceus. 



Near A. spinulosus, but more slender, sparingly leafy, the 

 stems tufted, and two feet high, from a woody base : leaves 

 linear, the lowest broader and pinnatifid, the upper often 

 only three-toothed at apex, lobes and teeth all spinulose- 

 tipped: heads few and corymbose, a half inch high: invo- 

 lucres turbinate, glandular-scabrous, not at all pubescent; 

 scales setaceous-tipped: rays numerous, light yellow: akenes 

 conspicuously nerved. A. gracilis, Gray Syn. Fl. ii. 130, as 

 to the plant of the " southern border of California." 



San Diego County; Cleveland, Mrs. Curran, and on the 

 peninsula as far down as S. Tomas, Orcutt, 1884-5. Very 

 clear of A. gracilis, by its suffrutescent, tall, reedy stems, 

 turbinate involucres and distinctly nerved akenes. It is 

 more related to the more easterly species, A. spinulosus, but 

 that, also, like A. gracilis, has hemispherical involucres, and 

 both are canescent, this nearly glabrous. 



Lessingia adenophora. 



Erect, a foot or two high, and much branched: radical 

 leaves wanting in the specimens: lower cauline ovate-ob- 

 long, an inch long, sessile by a broad base, sharply toothed; 

 upper broadly ovate, acute, more or less cordate-clasping; 

 all floccose woolly on both sides, the glabrate margins, es- 

 pecially of the upper, closely beset with stipitate glands: 

 heads 3 — 4 lines long, 5 — 8 flowered, terminating slender 

 branchlets: outer involucral scales stipitate-glandular, the 

 inner sharply acute and with barbellate margins: corollas 

 purple: style-appendages bearing a tuft of hairs, but no 



