Hemiznnin. C,0;yi 1>0SIT/K. 



361 



slightly hairy ; those of the ray obovate-oblong and obcoinprnssed, tipped with a 

 short indexed beak. — //em'2o»,ia {Hemuonella) Diirandi, (Iniy, 1. o. llnrpf^cnr- 

 pus mndarioides, Duraiid, not of Nutt. 



Dry hills, common through the foot-hills and the Sierra Nevada Iroin Marii.osa County north- 

 ward, and m Nevaila. ' ^ 



3. H, minima, dray, I. c. An inch or two liigh : hsaves lialf an inch or less in 

 length ; the uppermost equalling or barely surpassing the short-peduncled or almost 

 sessile heads : akenos olwvate, d(>cidedly obcompressed, glabrous or nearly so, tippe.l 

 with an inlloxed apiculatioii, but not hmki^A.— Jlrnmnuin {llrmiznnrlht) miinnut 

 Gray, 1. c. ' 



Dry sterile soil in the Sierra Nevada : Soda Spiings, Brcrrr. Rotwren Nevada Fall and Cloud's 

 nest, G7-ay. 



67. HEMIZONIA, DC, Torr. & (Jiay. Tauwf.i-.d. 



Head many - few-flowered, heterogamous, with 1 to 20 i)istillate mys ; the disk- 

 flowers several or numerous, hermaphrodite but usually all and always the central 

 ones infertile. Involucre of as many scales as ray-flowers, which are concave and 

 half enclosing their turgid akenes, or sometimes a few loose and empty outer ones. 

 Receptacle flat or conical, chafi'y only between the ray- and disk-flowers, or through- 

 out. Rays 2 - 3-toothed, cleft, or parted : disk-corollas funnelform, r)-lobetl. Akeno^s 

 of the ray turgid, more or less gibbous, obovoid and often triangular, commonly 

 minutely stipitate ; those of the disk, when formed, narrower and seldom truly 

 fertile. Pappus none in tlio ray, or in one species rudimentary ; either none or of 

 several chafi'y scales or awns in tlie disk. — Annuals or biennials, some with indu- 

 rated stems, and one frutescent, all Californian, mostly glandular and viscid, heavy- 

 scented : some of them are Tarweeds or Rosin-weeds of the Californians. Leaves 

 narrow, all but the lowest alternate : heads middle-sized or small ; the flowers yel- 

 low or white, with brownish anthers. — Benth. & Hook. Gen. PI. ii. 394 ; Gray, 

 Proc. Am. Ac. ix. 190. Hemizonia, Hartmannia, & Cabjcadenia, DC. Osmadenia, 

 Nutt. Hemizonia & Calycadenia, Torr. k Gray. 



§ 1. Fertile akenes very oblique, the small terminal areola from the siwimii of the 

 inner angle or face on a narrow beak or apicrdation '; the surface dull, often 

 rugose or tuberculate : flowers yellow. — Hartmannia, Gray. 



* Receptacle flat or nearly so, chaffy only between the ray- and dL^k-floioers ; the chaff 

 mostly united into a cup or internal involucre: heads small or middle-sized: akenes 

 of the ray rugose or somewliat tuberculate when mature, inserted by a short and. 

 thickish incurved stipe: disk-akenes all sterile and mostly abortive, usuallt/ bearing a 

 pappus of small scales. {Hartmannia, DC.) 



-I- Rays and disk-flowert few or several ; the former with tube thickish nt base; the 

 latter with conspirAious pappus of chaffy lace)-ate-toothed scales : heads comparatively 

 small, bracteate, mostly sessile or fascicled : scales of tlie involucre lanceolate, more 

 or less carinate toward the base. 



+-¥ Perennial and woody, exceedingly leafy : rays about 8. 



1. H. frutescens, Gray. Erect, 2 feet or more high, deci.lclly shrubby, with 

 nnnierous iiistigiato flowering brandies very leafy to the top. hirsute, aromatic and 

 viscid : leaves flliform, and with tufts of shorter ones in the axils, entire, or rarely 

 with one or two short lateral lobes : heads thyrsoid-racemose : involucre nearly gla- 

 brous : rays 8 or 9 ; the lignles obovate-oblong, 2- 3 tonfhed. about the length of 



