308 COMPOSITE. Hemizonia. 



* Receptacle conical or convex, many-flowered, all the disk-flowers subtended by narrow and 

 mostly quite distinct chaffy bracts, some of them not rarely fertile: ray-flowers ii.sually numer- 

 ous and in more than one series, witli short and yellow ligules; their akenes obovate-triangular, 

 with very oblique apiculation, usually smoothish: rigid and branching annuals; with some 

 or all of the lower leaves incisely pinnatitid, and the uppermost clustered around the sessile 

 heads. Hartmannia Olocarpha, DC. Prodr. 



-1 Leaves and bracts not pungent, but the upper gland-tipped. 



H. macradenia, DC. Stout, hirsute, viscid-glandular, very leafy : upper leaves linear, 

 entire or laciniately dentate ; those of the branchlets and axillary fascicles linear-subulate, 

 truncately gland-tipped : some of these aucl most of those crowded around the sessile glom- 

 erate heads, also the bracts of the involucre and even those of the conical receptacle, beset 

 with stipitate tack-shaped glands : heads fully half-inch in diameter : pappus none. Prodr. 

 v. 693 ; Hook. & Arn. Bot. Beech. 356 ; Torr. & Gray, Fl. ii. 400 ; Gray, Bot. Calif, i. 363. 

 Dry open ground, from the Bay of San Francisco southward. An unpleasantly scented 

 Tarweed. 



-t -t Upper leaves or their lobes and the bracts of the involucre rigid, pungently pointed, none 

 gland-tipped. 



H. Fitchii, GRAY. Villous-hirsute, somewhat viscid, above beset with small scattered tack- 

 shaped glands : leaves some (even of the lower) entire and elongated linear-acerose, very 

 pungent, some of the lower once or twice pinnately parted : bracts of the involucre subulate ; 

 those of the receptacle pointless, soft, bearded with long villous hairs : disk-akeues sterile, 

 with pappus of 8 to 12 linear paleie, fringed or bearded at tip, somewhat united at base, 

 nearly equalling their corolla. Pacif. R. Eep. iv. 109, & Bot. Calif. 1. c. Common in 

 California north and east of Sacramento ; first coll. by Rev. Mr. Fitch. 



H. Parryi, GREENE. Sparsely or slightly hirsute, sometimes minutely viscid-glandular: 

 leaves short; lower sparingly pinnatifid ; upper subulate-acerose, as also the tips of the invo- 

 lucral bracts ; those of the receptacle thin, villous on the margin, acute or obtuse, but 

 neither pointed nor rigid : sterile disk-akenes with a pappus of 3 to 5 narrowly linear slender, 

 pointed naked paleai which equal the corolla. Bull. Torr. Club, ix. 16. (Has been inex- 

 cusably confounded with the preceding and following.) Not uncommon in California from 

 Lake Co. to San Bernardino Co., Torrey, Parr;/, Parish, &c. 



H. pungens, TORR. & GRAY. Hirsute or hispid, sometimes only slightly so, hardly at all 

 viscid or glandular : cauline leaves piunatifid or the lower bipiuuatifid, and the lobes short ; 

 those of the branchlets and fascicles entire, lanceolate or linear-subulate, with very pungent 

 tips, those around the head little surpassing it: bracts of the receptacle also pungentlv 

 pointed: pappus to disk-flowers none. Fl. ii. 399; Bot. Calif. 1. c. Hartmannia pungens, 

 Hook. & Am. Bot. Beech. 357 ; Hook. Ic. PI. t. 334. Dry hills and fields, from San Fran- 

 cisco Bay southward ; first coll. by Douglas. 



* * Receptacle flat or nearly so, naked among the disk-flowers, which are surrounded by a circle 

 of connate or sometimes distinct bracts: rays golden yellow and with glandular usually slender 

 tubes: some of the pubescence glandular or viscid: no large tack-shaped or terminal truncate 

 glands. 



-) Rays 12 to 24, oblong-cuneate ; their akenes occupying more than one series, obscurely rugose : 

 disk-flowers as numerous, with wholly sterile or abortive ovary, and small pluiisquamellate 

 pappus or none. 



H. corymbosa, TORR. & GRAY, 1. c. Erect, corymbosely branched above, hirsute, with or 

 without short-pedicellate glands intermixed : lower or sometimes most of the cauline leaves 

 piunately parted into linear lobes ; those of the branches narrowly linear : heads rather large 

 (a third to half inch high) : rays 15 to 25, oblong-cuneate : bracts of receptacle well 

 united into a cup : akenes 4-5-nerved or angled (the nerve of the inner face indistinct or 

 wanting), and with beak short and stout : disk-pappus setosely plurisquamellate. H. an>;/isti- 

 folia, Beuth. PI. Hartw., not DC. //. macrocephala, Nutt. PI. Gamb. 174. H. balsamifera, 

 Kellogg, Proc. Calif. Acad. ii. 64, t. 13. Hartmannia corymbosa, DC. Prodr. v. 694. W. 

 California, in low grounds, common from San Francisco Bay to San Luis Obispo ; first coll. 

 by Douglas. 



H. angustifolia, DC. Diffuse, a span to a foot high, hirsutely pubescent and glandular, 

 becoming viscid : cauline leaves all linear, small, entire : heads corymbosely paniculate or 



