270 COMPOSITAE 
Involucre 7.5-10 mm. high, 12-15 mm. wide (pressed), shorter than the disk-florets, 
pies outer go doterlony meee oblong to oblong-obovate, ces ee? vel Peet disk- 
oro aie 6-7 m sure 
Involucre Jt 18 m 0-30 mm. wide fpresse@) « sine hd the ‘ai his , the 
Ghsflaries ee or lance-oblong; or ees disk- corolla, 9-10 
eho ‘0 ong. wit. peir 
Stems fants. (Sect Steno) herbage scarcely if at all glandular; “ethos entire; sit dined 
pla t 
Leaves soft, floccose-tomentose 17. H. lanuginosus. 
Tons rigid, glabrou ne scabrous pag: 
Leaves linear, 7—1 m. long, 1 m ig wa wide. 18. H. stenophylius. 
Leaves fener PSA to spain IR 10-60 mm. long, 1.5-7 mm. wide. 
19. H. acaulis. 
Plants not at all cespitose or mat-forming, but sometimes forming low cians ers 
Appen ee of s tyle-branches at least twice as long as the stigmatic port 
Plants low, vik icately branched shrubs mostly under 3 dm. high. (Se came Macronema.) 
wigs closely white-tomentose; heads discoid; leaves densely glandular 
— macronema. 
glandular, if rarely loosely tomentose then heads radia 
Seeds relatively large, 20-45-flowered; involucre broadly campanlate, — 2- ee 
e phyllaries not obviously ciliate or scarious-mar. gined; lea undu i - 5% 
jer ned; herbage densely stipitate-glandular rutt 
Heads smaller and narrower; involucre more hea 2-seriate; nanan ae eek very 
rarely stipitate-glandular. 
fenton villous-ciliate; leaves without axi ~— — cles. 
volucre narrowly campanulate, 3—6-ser the enti phyllaries not squar- 
rose-tipped; heads radi now aghat pein ce 
ponte Spencenes” 1.5-3.5 cm. Peta 3-7 mm. yg = A rae or 
22: 
Leaves Baga linear, 2-6 cm. long, 0.5-3 mm. Gack ead ieietal or 
erous in “4 raceme ve aurea panicle. 
omer 
Involucre cylindric, 5—8-seriate, the outer phyllar x sqarone tipped heads 
discoid, mostly 5- flowered, solitary oi few, openly ¢) bap oo 
0 
ts. 
en — (obscurely ciliate in H. gilmanit) ; ‘cece often with axillary 
Pong as spatulate, spaced; phyllaries resinous, the outer squarrose; 
flowers white (or pale yellow); disk-florets 15-18; Death Valley region. 
Leaves cea linear or filiform, crowded; phyllaries not pedkivnds. 
Out se dove ys often squarrose; flowers white (or pale yellow); disk- 
florets 10-15, their narrow lobes 1-2 mm. — Washington and 
Outer phyllaries erect; flowers yellow; oe — ae au 0.5 
; Great Basin. 27. H. nanus 
Plant an herbaceous perennial pty a ce base, mostly 3-6 dm. high. — Hesperodoria. ) 
. A. halli 
Appenda ges O of s b h or sho ti 
Involucre hemispheric, 10-18 1 mm. spare se tlt i -punetate; leaves entire. (Section 
Stenotopsis. ae 29. H. linearifolius. 
Involucre turbin subcylindric. 
Disk-c corolla ab abruptly dilated from narrow tube to much wider throat; heads discoid. (Section 
Phyllaries with green but thin tips; stems brownish; coastal. 
30. H. venetus. 
Phyllaries with thickened subepidermal resin-pocket near tip, not green; stems age 
31. H. acradeniu 
~~" only slightly ampliate upw 
Heads large, the 8-15 mm . high manera tightly imbricate, mostly 6—8-seriate; herbage 
ithout distinc ves resin-pits. (Section Hazardia.) 
e tomen snare an, lec 
€ not to; cuaaetvans ws inland. 33.20 Hs 
Heads ‘onal, , the 3-8 mm. ‘igh Se se imbricate, Pe Stig pis “with 
‘cam: 
Ray-florets resent: leaves filiform; heads more or less paniculate. 
ter phyllaries more or less caudate-t 
Leaves 10-35 mm. long, with gente fauldles § in ea axils; achenes pilose. 
me I ‘pin nifolius. 
Leaves 4-12 mm. — scarcely exceeding the salle, fascicles, ericoid; 
achenes glabro' . H. ericoides. 
Outer phyllaries acute to ove use. 
Heads solitary or few; invol p , 7-8 mm. pe. 
36. eastwoodiae. 
Heads many; involucre turbinate, 5—6.5 mm. high. 
37. H. palmeri. 
Ray-florets reduced or wanting (see — laricifolius). - 
soar: filiform to cha less than 3 mm 
eads solitary or racemose- CRISS. ienid: cer ee County south, 
. propinquus. 
Heads c: 
cymose. 
onde 0. Wich hiss long; broad rounded shrubs seldom more than 1 
serts, 
Herbage glabrous; leaves subterete, without persistent fascicles 
in the old axils; ray-florets 3-11; io flowering. 
fae o Far laricifolius. 
