AKISOCARPHUS COMPOSITE 346 



MADARIA 



Sterile. Bracts of the subglobose involucre as many as the rays, 

 carinate-complicate and enclosing the achenes. Receptacle some 

 what convex, naked and smooth except the margin which is 

 furnished with a single series of more or less united chaffy scales 

 between the ray- and disk-flowers. Branches of the style in the 

 disk-flowers subulate, very acute, minutely hispid. Achenes of 

 the ray oblong, obcom pressed, somewhat incurved, glabrous, with- 

 out lateral nerves or angles, crowned with a small sessile disk, 

 destitute of pappus; of the disk obovate, with a pappus of 5-8 

 small fimbriate-lacerate membranaceous scales. 



A. madioides Nutt 1. c. Madia Nuttallii Gray. Stems slender, 1-3 

 feet high, pubescent with white spreading hairs, glandular and paniculate- 

 ly branched above: leaves linear-lanceolate, 2-8 inches long, remotely ser- 

 rate, all but the lowest opposite : heads not very numerous, slender-pedun- 

 cled, about 4 lines high: bracts of the involucre 8-12, with short incon- 

 spicuous tips, densely glandular and hispid : rays 8-12, fan-shaped, deeply 

 3-lobed, 4-6 lines long: achenes obovate-falcate, much compressed, with 

 their sides many-striate. Common on dry ridges in forests, Brit Columbia 

 to California. 



48 MADARIA DC. Mem. 8oc. Genev. vii, 280. 



Erect annuals with mostly opposite leaves and rather large 

 heads of showy yellow-rayed vespertine flowers. Heads many- 

 flowered: the ray-flowers 10-20, ligu late, pistillate, in a single 

 series: those of the disk tubular, perfect but sterile by the abortion 

 of the ovary. Bracts of the subglobose involucre as many as the 

 rays, complicate and enclosing their achenes, flattish on the back 

 and with long somewhat spreading tips. Receptacle somewhat 

 convex, fimbriate-hirsute except the margin which is furnished 

 with 1 or 2 series of chaffy scales between the ray- and disk-flow- 

 ers. Corollas pubescent or hairy at base, the rays very conspicu- 

 ous but closing in sunshine. Achenes of the rays oblong-obovate, 

 nearly straight, compressed, glabrous, without pappus. 



M elegans DC. 1. c. Madia elegtns Don. Stems stout, 1-6 feet high, 

 pubescent with almost pilose spreading hairs, glandular above: leaves 

 linear-lanceolate 2-4 inches long, usually more or less serrate, sessile, by a 

 broad base, the lower crowded in a somewhat rpsulate tuft, the others op- 

 posite or scattered and becoming smaller upward : heads numerous, in an 

 open cyme: bracts of the involucre hirsute, the linear tips nearly as long 

 as the body : rays 12-20, 8-10 lines long, sharply 3-lobed, yellow, often with . 

 a red or brown spot near the base : achenes rather thin and flat. On dry 

 hillsides, western Oregon to California. 



M. corymfoosa DC. 1. c. Stems slender, 6-18 inches high, simple up to 

 the inflorescence, pubescent with soft spreading hairs^ glandular above : 

 leaves linear, mostly opposite, remotely serrate, 1-4 inches long : heads 

 rather few, in an open corymb ; bracts of the involucre somewhat pilose 

 and glandular, the linear tips not as long as the body. On dry hills and 

 ptaines, southern Oregon to California. Blooming early. 



49 MADIA Molina Chil. ; Cav. Ic. iii, 50, t. 298. 



Medium-sized viscid and heavy-scented annuals with oblong or 

 linear entire or denticulate sessile leaves and sessile or short^pe 



