362 COMPOSITE. Hemizonia. 



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

 mostly distinct: receptacle convex: disk-flowers 10 to 12, with well-formed but 

 empty ovary : pappus of 5 linear denticulate scales, about half the length of the 

 ovary. Proc. Am. Acad. xi. 79. 



Rocky precipice in the interior of Guadalupe Island, off Lower California, Dr. Palmer, 1875. 

 The only known species which does not inhabit the State, here given to complete the account of 

 the genus. Leaves an inch or so long. Involucre little over 2 lines high. Ray-akenes as in the 

 section ; the stipe 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 following species of the genus], the stems, 

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

 5 or 6. 



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

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

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

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

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

 of sterile akenes of 8 or 10 broad and thickish chaffy scales. Benth. Bot. Sulph. 

 30 ; Bot. Mex. Bound. 100. 



Common from Santa Barbara southward. Heads 2 or 3 lines long. 



3. H. fasciculata, Torr. & Gray. Paniculately branched above the base, a 

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

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

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

 fascicled in corymbose clusters : pappus of the sterile akenes of narrower chaffy 

 scales. Hartmannia fasciculata, DC. H. glomerata, Nutt. 



Common from Monterey to San Diego. Exhales a strong balsam which is injurious to wool. 



+- + Rays 12 to 20, oblong-cuneiform, with slender glandular tube ; their akenes gen- 

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

 loose, terminating corymbosely paniculate branches. 



4. H. angustifolia, DC. Diffusely 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. H. multi- 

 caulis, Hook. & Arn., ex Gray in Bot. Mex. Bound. 100. H. decumbens, Nutt. PI. 

 Gamb. 175. 



Var. Barclay! differs 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 terminal beak. 



Open grounds, from San Francisco and Monterey southward. Var. Bardayi, Monterey (Bar- 

 clay, with laciniate pappus), San Luis Obispo (Brewer, with broader scales to the pappus, much 

 as in H. ramosissima). 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, more or less viscid and glandular : radical and most of the cauline leaves 

 pinnatifid 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 

 chaffy bristles, or sometimes almost none. H. angustifolia, Benth. PL Hartw., not 

 of DC. Hartmannia cori/mbosa, DC. Hemizonia macrocephala, Nutt. PL Gamb. 

 174. //. bahamifera, Kellogg, Proc. Calif. Acad. ii. 64, fig. 13. 



Low grounds, common through the central and western portions of the State. Heads, including 

 the expanded golden yellow rays, an inch or mpre in diameter, many-flowered. Ray-akenes with 

 the short upturned beak somewhat dilated at the tip. 



