306 COMPOSITJE. Madia. 



M. glomerdta, Hook. A foot or so high, rigid, very leafy, hirsute, glandular only toward 

 the inflorescence : leaves narrowly linear : heads glomerate : rays 2 to 5 or sometimes none, 

 not surpassing the about equal number of disk-flowers : akenes (2 lines or more long) narrow, 

 those of the disk 4-5 angled ; of the ray somewhat curved aud 1-uerved on each face. — Fl. 

 ii. 24; Gray, I.e. Amida hlrsuta & A. gracilis, Nutt. I.e.; Torr. & Gray, I.e. — Rocky 

 Mountains of Colorado to Saskatchewan, Washington Terr., Oregon, and the Sierra Nevada 

 in California. 

 § 3. Harp^cXhpus. Ligules very short and incon.spicuous, not surpassing 



the solitary fertile disk-flower, all destitute of pappus : corolla glabrous. — Gray, 



1. c. HarpcEcarpus, Nutt. 1. c. 389. 



M. filipes, Gray, 1. c. Slender annual, a span to a foot or more high, hirsute, glandular 

 above, paniculately branched; tlie small heads (a line or two long) on long filiform pedun- 

 cles : leaves narrowly linear : bracts of the involucre 4 to 8, lunate and strongly carinate in 

 fruit, almost destitute of free tips, hispid-glandular : bracts of receptacle united into a 3-5- 

 toothed cup : ray-akenes obovate-lunate, the tip somewhat pointed by a small epigynous 

 disk: disk-akene straight aud oblitiuely obovate. — Sclerocarpus exiguus, Smith in Rees 

 CycL? Harpcecarpits madarioides, lUiitt. \. c. H. exiguus, Gra.j,^ot. Mex. Bound. 101. — 

 Open grounds, from S. California to British Columbia uear the coast, aud eastward to 

 Idaho. 



123. HEMIZ0N:ELLA, Gray. (Diminutive of Hemizonia.) — Little 

 annuals of Pacific N. America ; with somewhat the aspect and characters of the 

 Harpcecarpus section of Madia, hirsute-pubescent and above glandular, diffusely 

 branching : leaves linear, entire, opposite or some of the upper alternate : heads 

 in the forks and cymosely clustered, terminating the branchlets, short-pedun- 

 cled, small (a line or two in length) ; the very small corollas yellow. Involucre 

 glandular-hispid on the back. — Proc. Am. Acad. ix. 189, & Bot. Calif, i. 360. 

 Hemizonia § Hemizonella, Gray, Proc. 1. c. vi. 548. 



H. Durandi, Gray. A span high : earliest heads slender-peduncled : akenes narrowly 

 oblong-o1)Ovate or somewhat fusiform, manifestly obcompressed with the inner face slightly 

 angulate, tipped with a short but conspicuous incurved beak. — H. Durandi & //. jjarvula, 

 Gray, Proc. Am. Acad. ix. 189. Hemizonia. Durandi & //. parvula. Gray, Proc. Am. Acad, 

 vi. 549. — Dry ground, California, from the Yosemite Valley to Washington Territory ; first 

 coll. by Pratten. 



H. minima, Gray, 1. c, with syn. An inch or two high : peduncles all .shorter than the 

 heads : ray-akenes obovate, less incurved, much obcompressed, the beak obsolete or a minute 

 inflexed apiculation. — Dry sterile soil, California, through the eastern ranges of the Sierra 

 Nevada, from Mariposa Co. northward. Brewer, Matthews, &c. 



124. HEMIZONIA, DC. Tarweed. (Composed of yfxi, half, ^^vrj, gir- 

 dle, from the half-enclosed ray-akenes.) — Californian herbs, nearly all annuals 

 or biennials, usually glandular, viscid, and heavy-scented ; with alternate or some- 

 times opposite leaves, and middle-sized or small heads of yellow or white flowers, 

 the anthers commonly brownish. Fl. summer or later. — Torr. & Gray, Fl. ii. 

 396; Benth. & Hook. Gen. PI. ii. 394; Gray, Proc. Am. Acad. ix. 190, xix. 17, 

 & Bot. Calif, i. 361. Hemizonia, Hartmannia, in jjart, & Calycadenia, DC. 

 Prodr. V. 692-695. 



§ 1. EuHEMizoNiA, Gray, 1. c. Ray-akenes only fertile, obovate-triangular, 

 with depressed terminal areola hardly eccentric, glabrous, smooth and even : 

 disk-akenes abortive and without pappus : annuals, a foot or so high ; with entire 

 or merely denticulate and mostly linear leaves, and white or yellow flowers : rays 

 3-lobed. — Hemizonia, DC. (the typical species of both sections). 



