402 COMPOSITiE. 



3. H. sparsiflora. Eva.r caule>icens, var. sparsijiora, Gray. Slender 

 but rigid, 2—5 in. high, with few or many ascending branches from the 

 base, all leafy and floriferous throughout: leaves 1 in. long, the petiole 

 little longer than the cuspidately acute blade: heads small, few in the 

 axils of all the leaves and not more numerous at the summit, narrowly 

 oblong.— Common on open hillsides in middle parts of the State toward 

 the interior and on the seaboard. May. 



4 H. brevifolia. Evax caulescens, var. brevifolia, Gray. Habit of 

 the last, but only 12 in. high, more woolly, the small leaves very short- 

 petiolate and the heads mostly clustered and terminal, few or none in 

 the axils; all the parts small.— Humboldt and Mendocino counties and 

 northward. April, May. 



5. H. acaulis. StylocUne acaulis, Kell. Proc. Calif. Acad. vii. 112 

 (1877). Evax caulescens, var. minivia, Gray, partly. Very dwarf, stem- 

 less, the whole plant only }i—% in- liiglii white-woolly: leaves spatulate- 

 oblong, mucrouately acute: heads glomerate and sessile among the 

 leaves, very small, few-flowered: bracts subtending the one or more 

 sterile flowers narrow, acute, woolly on the inner face, glabrous without, 

 —Hills of Fresno Co. and northward. 



39. PSILOCARPHUS, Nutlall. Small usually depressed much 

 branched floccose annuals, with opposite leaves and globose heads sessile 

 in the axils or at the forks. Fructiferous bracts numerous, on the 

 globular or oval receptacle, cucullate-saccate, semiobovate or semi- 

 obcordate, rounded at top, herbaceo-membranaceous, apex introrse, the 

 ovate or oblong hyaline appendage inflexed or erect. Achene loose 

 within the bract, oblong or narrower, straight, slightly compressed. 

 Pappus none. 



1. P. teiiellns, Nutt. Trans. Am. Phil. Soc. vii. 341 (1840). Pros- 

 trate, forming a dense mat 3—6 in. wide: heads very many: leaves 

 spatulate, }4~^3 ^^- long: fructiferous bracts scarcely a line long: 

 achene ovate-oblong.— In rather low or shaded grounds among the 

 hills. May. 



2. P. brevissiinus, Nutt. 1. c. 340. Dwarf, with very few and rather 

 large woolly heads: leaves oblong or lanceolate, 2—5 lines long, seldom 

 surpassing the heads: achene cylindrical or slightly clavate, 1 line long. 

 —Plains of the interior in low places. May. 



3. P. globiferus, Nutt. 1. c. Branched from the base and spreading 

 or prostrate: leaves linear or narrowly spatulate, the uppermost little 



