OF ARTS AND SCIENCES. 55 



BiGELOViA VENETA, Gray, var. (?), with small heads and the leaves 

 mostly entire, somewhat pubescent. On an island in Guaymas har- 

 bor. (334.) 



PsiLACTis CouLTERi, Gray. In waste places at Guaymas. (99.) 



Aster frutescens. Shrubby " with very compact rounded top," 

 with gray stem and branches, the herbaceous portion glandular- 

 scabrous: leaves oblong-obovate to oblanceolate, an inch long or less, 

 the lower attenuate to a narrow base, the upper sessile by a broader 

 (ir somewhat clasping or even subcordate base, coarsely spinulose- 

 dentate, rather rigid and conspicuously reticulate, sparingly glandular- 

 scabrous : heads solitary and terminal on the leafy branchlets, large 

 (5 or 6 lines high) ; bracts of the involucre loosely imbricated, linear, 

 narrowly acuminate, the green tips somewhat spreading; rays "lilac," 

 about 20, rather short ; achenes cauescent with subappressed hairs, 

 nerved, subcompressed ; pappus whitish. — A sjiecies of peculiar habit, 

 most nearly related to the section Megalastrum, but the heads smaller 

 and not naked-pedunculate. On a stony ridge near Los Angeles Bay. 

 (513.) 



Baccharis sarothroides, Gray. "Yerba del pasmo " ; the 

 twigs are used as a remedy for toothache. Earely over 2 feet high. 

 San Pedro Martin Island. (414, 415.) 



Pelucha* trifida. a much branched and leafy shrub, about 3 

 feet hish, canescent with a thin fine close tomentum : leaves linear 

 with a broader obtusely 3-toothed or usually 3-cleft summit, 6 to 9 

 lines long: heads about 2 lines high, mostly 10-15-flowered : achene 

 hispid. — On San Pedro Martin Island, in crevices of rocks near the 

 sea. (407.) 



Lagascea decipiens, Hemsl. A compact shrub, 4 feet high. 

 Mountain ravines above Guaymas. (256.) 



Franseria ambrosioides, Cav. At Muleje and Guaymas. (21.) 



Franseria ilicifolia, Gray. Stems herbaceous, 1^ feet high. 

 Ravines near Los Angeles Bay. (578.) 



* PELUCHA, a new genus of PiucheinecB. Heads discoid, rather few- 

 flowered, homoganious, the flowers all perfect or some sterile. Involucre of two 

 rows of nearly equal linear herbaceous bracts. Receptacle naked. Corolla 

 slender, slightly dilated upward, very shortly toothed. Anthers very narrowly 

 sagittate at base. Style-branches narrow, or the style sometimes undivided. 

 Achene small ; pappus rigid, scabrous. — Shrubhy, very heavy scented, tomen- 

 tulose, with alternate -S-fid leaves and small heads in terminal cymes. Closely 

 allied to Blumea and Pluchea. The specimens are not in very good condition, 

 but a careful study of the material leaves little doubt of the distinctness and 

 tribal position of the genus. 



