PTILORIA PANICULATA Greene. 



Erect, annual, 1-2 ft. high; bearing 

 numerous 3-5-fl'd heads in an elongat- 

 ed narrow or more open panicles, or 

 else more strictly disposed on virgate 

 branches: leaves linear or the lower 

 lanceolate. Oregon; Idaho; Santa Cruz 

 Island. 

 PTILORIA PARRTI Orcutt. 



Stout, widely branched from base; 

 leaves thickish, deeply pinnatifled; 

 pappus-bristles naked (often united in 

 twos or threes) at base. Southern 

 Utah; Mohave Desert. 

 PiILORIA PAUCIFLORA Raf. 



Stout, rigid, 1-2 ft. high, branches 

 spreading: lower leaves commonly lan- 

 ceolate, upper linear or reduced to 

 scales: pappus dull white, plumose on- 

 ly to near the base. Wyoming to Tex- 

 as and Cal. 

 PTILORIA PENTACHAETA Greene. 



Annual, ^-3 ft. high: pappus of 5-7 

 bristles distinct to the base, which is 

 little dilated, plumose only above the 

 middle. Baja Cal. (Or); Colorado Des- 

 ert; Nevada; Arizona; New Mexico. 

 PTILORIA VIRGATA Greene. 



Rigid, 1-4 ft. high: heads 6-8 mm 

 long, mostly subsessile or short pedun- 

 cled: upper leaves linear, small, entire: 

 lower oblong, or spatulate, often sinu- 

 ate or pinnatified: akenes subclavate 

 or oblong, rugose-tuberculate between 

 the narrow ribs: pappus moderately 

 plumose. Baja Cal. to Oregon; Neva- 

 da; Utah. 

 HYMENOPAPPUS LUGENS Greene. 



"Near H. luteus, and with similar 

 multicipitous caudex and leafless pe- 

 dunculiform stems about a foot high, 

 but more slender, the monocephalus 

 branches of the inflorescence longer 

 and more divergent: herbage less to- 

 rn entose. often green and almost gla- 

 bious: involucre smaller, campanulate, 

 their bracts distictly biserial. the outer 

 shorter, oval or broadly oblong, show- 

 ing a rather broad dark-purple margin, 

 the inner cuneate-obovate, not mar- 

 gined: corollas greenish-yellow, elon- 

 gated, the narrow subcylindric throat 

 much longer than the proper tube: 

 achenes silky- villous; scales of the 

 pappus oblong-obovate, as long as the 

 proper tube of the corolla and exceed- 

 ing the villous hairs of the achene. In- 

 yo and San Bernardino counties, Cal. 

 (Parish)." Greene, pitt 4:43. 



66 



ERIOPHTLLUM OBOVATUM Greene. 



"Stem a foot high from a perennial 

 root; branches few, stout, erect or as- 

 cending from a decumbent base, leafy 

 up to the monocephalous terminal pe- 

 duncles; only the lowest leaves oposite, 

 and all, together with the branches, 

 peduncles and involucres, densely 

 white-tomentose: leaves all entire, an 

 inch long or more, from obovate-spat- 

 ulate to broadly oblanceolate: heads 

 large, hemispherical; involucral bra-cts 

 broad and few, apparently united to- 

 ward the base: rays light yellow: co- 

 rolla-tube glandular-hispidulous: ache- 

 nes glabrous: pappus conspicuous, of 

 about 8 very unequal paleae, the lon- 

 gest being lanceolate, remotely lacer- 

 ate-toothed, the others very short and 

 obscure." Greene, Erythea 3:123. San 

 Bernardino Mts.. Cal. 5,000 ft. 

 CHAENACTIS ORCUTTIANA Parish. 



Parish, Erythea 6:92, based on C. ten- 

 uifolia orcuttiana Greene, W Am Sci 

 3:157." Cliffs facing the ocean, Enci- 

 nitas, Oceanside, Cal. 



Chaenactistenuifolia orcuttiana Greene, 

 W Am Sci 3:157 (Ag 1887) : "Stouter than 

 the type and somewhat depressed; Ivs 

 thickish and more than once pinnatifld, 

 the secondary lobes short and obtuse;fln'g 

 branches and involucre resinous-glandu- 

 lar; plant fl'ng in summer, after the dis- 

 appearance of the vernal type." A succu- 

 le^t. non-erect maritime plant. SD. 

 CHAENACTIS PARISHII A.Gray. 



Minutely canescent: stems branching 

 from a suffrutescent base and bearing 

 few heads: leaves pinna tely parted in- 

 to short and partly entire linear lobes: 

 heads hardly over % in. high: paleae of 

 pappus 13-15. linear. Sar. Jaciiito Mts., 

 Cal. (Parish): Baja Cal. (Or). 

 CHAENACTIS SANTOLINOIDESGreene 



"A cespitose< perennial, the stems; less 

 than a span high. and. with the foliage, 

 densely white-woolly; leaves linear to 

 linear-lanceolate in outline. 1-2 in. long 

 and 1-3 lines wide, somewhat quadran- 

 gular with the numerous, small, crowded 

 and imbricated Ifts: beads lars-e. solitary, 

 on naked peduncles o- 1 ^ in. high; cor ap- 

 parently w: pappus of 10-1." very unequal, 

 ov.iari^po'pte scale-." Greene, Torr cl b 

 9:T7. S Ber mts ("Parish 1045). 

 CHAENACTIS SUFFRUTESCENS A. Q. 



Tomentose-canescent: branches sim- 

 ple from a decumbent ligneous stem, 

 erect, bearing a solitary long-pedun- 

 cled head: leaves pinnately parted into 

 narrowly linear entire lobes: head 

 nearly an inch high: paleae of pappus 

 10. ob'ong-ligulate. Near Mt. Shasta. 

 Cal. 



