Aplopappus. COMPOSITE. 127 



petiole), entire or denticulate or on same plant spinulose-serrate : heads several or rather 

 numerous, racemosely or spicately disposed along naked upper part of the stem or (either 

 singly or 2 or 3 together) in axils of upper leaves : involucre (half-inch or less high) from 

 hemispherical to turbiuate-campauulate ; its bracts rigid, well-imbricated, and with short ab- 

 rupt mostly mucronate-poiuted or apiculate green tips, these either erect or somewhat squar- 

 rose : rays (8 to 20) 2 or 3 lines long. Torr. in Sitgreaves Rep. 162, as to syn., &c., proba- 

 bly not as to the specimen. Homopappus racenwsus, Nutt. Trans. Phil. Soc. 1. c. 332. Pyrrocoma 

 racemota, Torr. & Gray, Fl. ii. 244. The type is a form with virgate stem, bearing 3 to 9 

 racemosely or spicately disposed and approximate or remote heads, of the larger size, with 

 involucre half or two-thirds inch broad as well as high, and akenes (or at least ovaries) more 

 or less beset with villons hairs. A. lanceolntus, var. stn'ctus, Gray, Proc. Am. Acad. viii. 389, 

 is a form with more villous akeiies. Plains of Oregon, Nuttall, Hull, &c. : also Northern 

 California, Greene, where it varies with many and correspondingly smaller heads, these glom- 

 erate in numerous axils, and the campamilate involucre disposed to be squarrose. Also it 

 evidently passes into 



"Var. glomerellllS. Heads narrower and smaller, disposed to be fascicled in twos or 

 threes in the axils of small upper leaves, or at summit of stem or short peduncles : involucre 

 often turbinate : akeues glabrate or sometimes glabrous : herbage somewhat more disposed 

 to be balsamic-viscid. ffomo/tappus glomeratus, paniculatus, & argutus, Nutt. 1. c. 331. Pi/r- 

 rocoma g/omerata, /laniculata, & unjuta ( the latter a stouter and more leafy state), Torr. & Gray, 

 1. c. Aplopappus paniculatus, Gray, Bot. Calif, i. 311. Plains of the Columbia, E. Oregon, 

 Nuttall, Nei-iits, Cttsick, &c. N. W. Nevada, Anderson, Lemiiton. 



Var. virgatus. Slender and smaller, with strict virgate stems and narrow leaves : 

 heads as in the type, but only half the size, few, or in depauperate plants solitary. A. panicu- 

 latus, var. riryatus, Gray, Bot. Calif, i. 312. Eastern part of the Sierra Nevada, California, 

 Bolandcr, Lain/ton, &c. Passes into 



Var. steilOCephalus. This is to var. f/lomerellus what var. virgutus is to the type : 

 it has scattered heads ; these narrow, comparatively few-flowered ; the bracts of the oblong- 

 turbinate involucre rigid and more pointed. A. paniculatus, var. stenocep/talus, Gray, Bot. 

 Calif. 1. c. With preceding var., Lemmon. 



A. apargioides, GRAY. Low, with numerous ascending or diffuse few-leaved or some- 

 times scapiform stems from a thick caudex, a span to a foot high, bearing solitary or few 

 pedunculate heads : leaves lanceolate or the radical broader, from denticulate to laciniate- 

 dentate or even pinnatifid : involucre hemispherical (a third to half an inch high) ; its bracts 

 lanceolate to narrowly oblong, mostly obtuse, imbricated in few rather loose ranks, outer 

 sometimes equalling the inner : rays 20 or more, oblong, comparatively large, commonly fer- 

 tile : pappus softer. Proc. Am. Acad. vii. 354, & Bot. Calif, i. 311.-- Eastern parts of the 

 Sierra Nevada, California and adjacent Nevada, from Sierra Co. to San Bernardino Moun- 

 tains; first coll. by Bolander. 



= = Pubescence not tomentose nor floccose, but rather villous and persistent : leaves thimiish, 

 oblong, more regularly and closely spinulose-serrate, numerous and approximate on the stem or 

 branches up to the heads or nearly: rays fertile. 



A. hirtus. A foot or less high, hirsutely pubescent and villous, even to the involucre, or at 

 base lanugiuous: stems rather simple, ascending, bearing few or scattered pedunculate 

 heads: leaves membrauaceous, pectinately serrate with long and salient slender-subulate 

 teeth ; cauline an inch or two long, radical sometimes 4 inches long and with margined 

 petioles : involucre hemispherical, half-inch or more high ; its bracts rather loose, linear, acu- 

 minate or acute, all about equalling the disk, the outer mainly foliaceous : rays 20 or more, 

 conspicuous: akenes rather short, sericeous-pubescent: pappus soft, whitish. Baker Co., 

 Oregon, Cusick. Washington Terr., Brundegee. Might be arranged in a following sub- 

 division, with A. uniflorus, but has the habit of the next. 



A. Wllitneyi, GRAY. About a foot high, somewhat minutely villous-pubeseent, or foliage 

 glabrous, branching, bearing rather numerous fasciculate-panicled and mostly sessile heads : 

 leaves inch or less long, spinulose-dentate, those subtending the lower heads hardly smaller 

 than the main cauline ones: involucre narrow, oblon- lurlniiate (about half-inch long), 

 glabrous; its bracts lanceolate, acute, appressed, subcoriaceous, with short and sometimes 

 indistinct green tips, well imbricated, outer successively shorter : rays 5 to 8, with oblong 

 and small ligules, little surpassing the 10 to 20 disk-flowers: akenes oblong-linear, glabrous, 



