SUNFLOWER FAMILY 551 
149. HECASTOCLEIS A. Gray, Proc. Amer. Acad. 17: 220. 1882. 
Shrubs with cauline leaves wai appearing singly on younger shoots, later develop- 
ing axillary fascicles of smaller leaves in the axils. Involucres in terminal clusters, sub- 
tended by whorls o oval or Aare reticulate, stramineous, floral leaves, each involucre 
1-flowered with narrowly lanceolate, spinose-tipped phyllaries. Corolla whitish, tubular, 
deeply divided into 5 linear aprendings ‘lobes firm in texture and widely spreading in anthesis. 
Stamens fete in texture with a glabrous appendage. Style purplish red, surpassing the 
anthers, stigma emarginate. Achene glabrous in age, the pappus s coroniform and 
laciniate- fare coriaceous. [Name Greek, referring to the separate enclosure of each 
flower in its involucre 
A monotypic genus, native in the desert regions of southwestern Nevada and the Death Valley region of 
adjacent California. 
1. Hecastocleis shockleyi A. Gray. Prickle-leaf. Fig. 5955. 
Hecastocleis shockleyi A. Gray, Proc. Amer. Acad. 17: 221. 1882. 
out, divaricately branched shrub 5-7 dm. high, with rigid leafy oe bark of the older 
stems tate gray or blackish, somewhat shreddy, that of the younger stems stramineous, shining 
the ultimate ifasnhlete tomentose. Cauline leaves ahetuate sessile, fascicled and shorter on the 
older leafy stems, coriaceous, linear-lanceolate, strongly spine-tipped, the margins with few 
sle spi young es fi 
so mm, long, 
reticulate-veined, becoming stramineous and papery ; involucres 1-flow ered, narrowly cylindric, 
he rs et in 4-5 series, appressed, cuspidate-acuminate, loosely woolly on the margin ; achenes 
sparsely tomentose when young, glabrous in age, subcyclindric, somewhat narrower at bas e, the 
covering thinner in texture than the coroniform lecinicie’g us. 
Desert mountains, Upper Sonoran Zone; western Esmeralda catia ineral Counties to Clark Nevada, 
westward to the Death Valley region and the In la Mountains, cong" om Type ring Fat Gasdels “at og Tt eralda 
County, Nevada, altitude 6, ee shies Said by Shockley to have been collected at Silver Peak, Esmeralda County, 
instead of the locality given by Gray in the selina description. ton a uly. 
Tribe 12. CICHORIEAE. 
Achenes widvent paps fxith short, crown in variety of Eee’ 
aves basal, t r bract-like; eg pecies. 
Dese ee : flowers white or pinkish. 163. Atrichoseris. 
Derchatily of ot Sierra = fies ada; flowers Arig 154. penance 
Leaves happen eae and cauline; Siteteced species. 176. Lapsa 
Achenes with p 
Pappus ast or = completely eo or plumose s 
aceous, 0 aw above the calananioele base (capillary bristles in Nothocalais alpestris, 
Seer is eat A 
Phyllaries enclosing the outer achenes; pappus of the outer achenes aifcrian Bla of the inner. 
'ypnois. 
Phyllaries not cae the outer achencs; peeess of _ — — outer ace ali - 
Pappus of 2 or 3 series of u 150. Cici : 
Pappus- cr ina ress series, surmounted by a smooth, scabrous or Ae awn (pappus 
ls fw ms of M onsets. Tig lee shades of yellow 
ith hentia ot erect; outer and inner phyllaries equal or nea rl 
—— Sy nearly so ae 
Annual or ah Lihat with heads nodding in bud; outer aay n rip so tg iortér than 
the in 
atiapegt bos -conspiewousl plumose and sometimes paleaceous-dilated at is extreme besie or with 
wien arte sa and slender or short and stout beaks (outer achenes truncate in Hypochoeris 
. ees we r papers paleaceous in Leontodon leysseri). 
ed into a short bea 169. Leontodon. 
Achenes rie a long slender beak. 
Phyllari 2 series, unlike, the outer broadly ovate, subcordate; pubescence coarse- 
tee i . Picris. 
Phyllaries in a series or loosely imbricated, alike; plants gisheous: (except Hypochoeris). 
Stems scapos 166. Hypochoeris. 
Stems leafy. 
Leaves grass-like; involucr lat ctlets. 164. Tragopogon 
L pinnatifid; icauers with calyculate bractlets. 158. nehiesguia, 
Achenes truncate. 
Involucre ly imbricated, the pt 
im ies rounded and broadly scar 
Anisocome. 
—_ not or but little suave subtended by calyculate ces the phyllaries nar- 
owly or not at all meets ined. 
us of stout awns g d the b. 155. Chaetadelpha. 
Pappus of slender p se bristles. 
Ligules yellow; bristles in more than 1 series, unequal. 165. Scorzonera. : 
gules pale or acts pink; bristles in 1 series, equal. 157. Stephanomeria. 
Li ris! 
Pappus-bristles capillary, either smooth or scabrous, ee barbellate. 
Achenes flattened (obscurely so in ‘Soiche 2. 
