306 COMPOSITE. Madia. 



M. glomerata, 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 : akeues (2 lines or more long) narrow, 

 those of the disk 4-5 angled ; of the ray somewhat curved and 1 -nerved on each face. Fl. 

 ii. 24 ; Gray, I.e. Amida htrsuta & 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^CA"RPUS. Ligules very short and inconspicuous, not surpassing 

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

 1. c. Harpcecarpus, Nutt. 1. c. 389. 



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

 above, pauk-ulately branched ; the 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 cariuate 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 epigyuous 

 disk: disk-akene straight and obliquely obovate. Sclerocarpus exiguus, Smith in Eees 

 Cycl.? Harpa?carpusiitadarwidcs,Rutt.l.c. H. exiguus, Gray, Bot. Mex. Bouud. 101. 

 Open grounds, from S. California to British Columbia near the coast, and eastward to 

 Idaho. 



123. HEMIZONELLA, 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-peduu- 

 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 sleuder-peduncled : akenes narrowly 

 oblong-obovate or somewhat fusiform, manifestly obcompressed with the inner face slightly 

 angulate, tipped with a short but conspicuous incurved beak. H. Durandi & II. pan-u/a, 

 Gray, Proc. Am. Acad. ix. 189. Ihini^unia Durandi & //. parvula, Gray, Proc. Am. Acad. 

 vi. 549. Dry ground, California, from the Yoseniite 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-akeues obovate, less incurved, much obcompressed, the beak obsolete or a minute 

 iuflexed 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 fo h half, 0^77, gir- 

 dle, from the half-enclosed ray-akenes.) California!! 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. PL ii. 394; Gray, Proc. Am. Acad. ix. 190, xix. 17, 

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

 Prodr. v. 692-695. 



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

 with depressed terminal areola h;)rdly 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). 



