308 COMPOSITE. Hemizonia. 



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

 mostly quite distinct chaff}' bracts, some of them not rarely fertile: ray-flowers usually numer- 

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

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

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

 heads. — Hartmannia ^ Olocarpha, DC. Prodr. 



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

 ~ H. macradenia, DC. Stout, liirsute, viscid-glaudular, very leafy: upper leaves linear, 

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

 truncately gland-tipped : some of these and 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. 3G3. — 

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

 Tarweed, 



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

 gland-tipped. 



fc>H. Pitchii, Gk.vy. ViUous-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 pinuately parted : bracts of the involucre subulate ; 

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

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

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

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



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

 leaves short ; lower sparingly pinnatifld ; 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 nalied palea; 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., Torrei/, Parnj, Parish, &c. 



"H. piingens, Tork. & Gr-w. Hirsute or hispid, sometimes only slightly so, hardly at all 

 viscid or glandular : cauline leaves pinnatifld 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 "pungently 

 pointed: pappus to disk-flowers none. — Fl. ii. 399; Bot. Calif. 1. c. Hartmannia pmif/ens, 

 Hook. & Arn. Bot. Beech. 3:57 ; Hook. Ic. PI. t. 334. — Dry hills aud 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 j^landular usually slender 

 tubes; some of the pubesc^ce glandular or viscid: no large tack-shaped or terminal truncate 

 glands. 



-1- Kays 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 plurisqiiamellate 

 pappus or none. 



- H. corymbosa, Torr. & Gray, 1. c. Erect, corymbosely branched above, hirsute, with or 

 without shnrt-pcdicelhitc glands intermixed : lower or sometimes most of the cauline leaies 

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

 (a third to half inch high) : rays 15 to 25, ol)long-cuneate :" bracts of recept;icle well 

 united into a cup : akenes 4-5-ncr; ed or angled (the ,ner\ e of the inner face indistinct or 

 wanting), aud with beak short and stout : disk-papjjus setoselv plurisquainellate. — H. angiisti- 

 folia, lieuth. PI. Hartw., not DC. II. macroccphula, Nutt. PI. Gamb. 174. H. balsamlfera, 

 Kellogg, Proc. Calif. Acad. ii. 64, t. 13. Hartmannia cnri/nihosa, DC. Prodr. v. 694. —w'. 

 California, in low grounds, common from San Francisco B:iy to S:iu Luis ()bispo; 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 : lieads' corymbosely paniculate or 



