;j(j2 CUAirOSITJi. Utiiuzonia. 



the involucre : chail' of the receptacle of as many narrow linear scales which are 

 mostly distinct: receptacle convex: ilisk-llowers 10 to 12, with well-formed but 

 empty ovary : pappus of 5 linear ilenticulato scales, about half the Icnglli of tlio 

 ovary. — I'roc. Aui. Acad. xi. 7'J. 



|{(i('ky iii'iii'i|iit'it in llm iiilciior til' (iiiM(litlii|io IhIiukI, oil' Lowor (.'iilil'oriiiii, lh\ J'uliinr, IH7.'). 

 The only known Mpuclos \\\\W.\\. iluoa iidI inluibit llio 8Uitu, licio j^ivon to conmiolo tlio mconnl of 

 the genua. Leaves tin incli or so long, involucre little over 2 lines high, llay-akeaes as in the 



section ; tho stipo at base and the curved beak at the apex pretty long : sterile disk-akenes con- 

 taining an abortive ovule. 



++ ++ Annuals or biennials (as are all the folloit/ing species of the genus), the stems, 

 however, sometimes indurated in age : rays only 5, broad and short : disk-Jlowers 

 5 or 6. 



2. H. ramosissima, Benth. Diffusely and paniculately much branched, slen- 

 der, a foot or so in hciylit, almost glabrous, above viscid-glandular : cauline leaves 

 chiefly entire, linear, small, sessile with broadish liase, occasionally and sparsely 

 beset, especially on the margins (us also are the branchlets), with some hispid or hii-- 

 sute hairs : heads scattered or somewhat fascicled on tlie leafy branchlets : pappus 

 of sterile akenes of 8 or 10 bnjad and tluckish chaffy scales. — Benth. Bot. Sulph. 

 30; Bot. Mex. Bound. 100. 



Common houi Santa Ikrbara southward. Heads 2 or 3 lines long. 



3. H. faBCiculata, 'I'orr. & Gray. Paniculately branched above the base, a 

 span to a loot or two high, sparsely hirsute or hispid : radical leaves once or twice 

 pinnately parted ; cauline leaves linear, either laciniate-pinnatilid, few-toothed, or 

 entire, an inch or two long, those of the branchlets shorter and mostly entire : heads 

 fascicled in corymbose clusters : ])ai)pus of the sterile akenes of narrower chalfy 

 scales. — llartmannia fasciculata, I)C. II. glomerata, Nutt. 



Common from Monterey to San Diego. Kxlmles a strong balsam >vhich is injurious to wool. 



+■ +■ Hays 12 to 20, oblong-cuneiform, xvith slender glandular tube ; their alcenes gen- 

 erally occupying two series : disk-Jloivers more numerous: heads larger and mostly 

 loose, terminating curymbosely jtaniculate branches. 



4. H. angustifolia, DC. Dillusely branched from an at length indurated 

 base, a span to a foot high, hirsute and viscid-glandular throughout : cauline leaves 

 all entire, linear (chiefly less than an inch long) ; rays 12 to 15 : pappus of the sterile 

 disk-ovaries none, or a row of minute short bristles rather than scales. — //. multi- 

 canlis. Hook. & Arn., ex (Jray in J>ot. Mex. Bound. 100. //. decumbens, Nutt. PI. 

 Gamb. 175. 



Var. Barclay! diifers in having the ovaries of the disk-flowers enlarging into 

 sterile akenes bearing a conspicuous chaffy laciniate pappus : mature fertile akenes 

 more incurved and with an unusually conspicuous terndnal beak. 



Open grounds, from San I'^iancisco and Monterey southward. Var. Bardoyi, Monterey {B«r- 

 clay, witli laciniate pappus), San I.uis Obisjw {Brewer, with l>roader scales to the pappus, much 

 as in //. ramosistiima). Akenes rather obscurely rugose, tipped with the more or less prominent 

 narrow beak, the little stipe at the base usually incurved and dilated at the insertion. 



5. H. corymbosa, Torr. & Gray. Corymbosely branched, a foot or so high, 

 hirsute, nujre or less viseid and glandular ; radical and most of the caidine leaves 

 pinnatilid with linear lobes ; uppermost and those of the branches linear and entire : 

 rays 15 to 25 : pappus of the sterile disk-ovaries of minute scales, mostly cut into 

 chatty bristles, or sometimes almost none. — II. angustifolia, ]ienth. PI. Hartw., not 

 of DC. llartmannia cori/mbosa, DC. Hemitonia rnacrocephala, Nutt. PI. Ciamb. 

 174. //. balmmifera, Kellogg, Proc. Calif. Acad. ii. G4, fig. 13. 



Low grounds, common through the central and western ))ortions of the State. Heads, includiii'j 

 the expanded golden yellow lays, an inch or more in diameter, many-llowered. Uuy-ukenes witli 

 the short upturned beak somewhat dilated at the ti{t. 



