346 COMPOSITE anibocarphcs 



MADBBIA 



sterile. Bracts of the subglobse 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. iBranches of the style in the 

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

 the ray oblong, obcompressed, somewhat incurved, glabrous, with- 

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

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

 small' fimbriate-lacerata membranaceous scales i 



A. madioides Nutt. 1. c. Madia NuttalHi O'ay. 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: aehenes obovate-falcate, much compressed, with 

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

 to California. 



48 MADA.EIA DO. Mem. Soc. 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, ligulate, 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 

 end with long somewhat spreading tips. Receptacle semewhat 

 convex, flmbriate-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 sunsnine. Achenes of the rays oblong-obovate, 

 nearly straight, compressed, glabrous, without pappus. 



M. elegaus DC. 1. c. Madia elegans Dou. Stems stout, 1-6 feet high, 

 pubescent with almost pilose spreading hairs, glandular above: leaves 

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

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

 posite or scattered and becoming smaller upward: heads numerous fn an 

 open cyme : bracts of the involucre hirsute, the linear tips neaily 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 : achenos rather thin and flat. On dry 



hillsides, western Oregon to California. 



M. corymbosa 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 

 plains, southern Oregon to California. 



49 MADIA Molina Chil. Cav. lo. 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- 



