madia COMPOSITE 347 



duncled^heads of yellow vespertine flowers. Heads few- to many- 

 flowered ; the ray-flowers 1-12, rarely none, ligulate, pistillate, in 

 a single series ; disk-flowers tubular and perfect. Bracts of the 

 involucre in a single series, carinate and conduplicate, each en- 

 closing an achene, their free herbaceous tips erect or involute. 

 Receptacle flat, with a single series of scales between the ray- and 

 disk-flowers, which are usually more or less united into a cup, 

 otherwise naked. Achenes linear-oblong or clavate, compressed, 

 nearly straight, glabrous. Pappus none. 



M. sativa Molina Chili ed. i, 136. Commonly robust, 1-3 feet high, 

 pubescent with slender somewhat viscid hairs and beset with pedicillate 

 glands: leaves from broadly lanceolate to linear: heads commonly sbort- 

 peduncled, 5-6 lines high: rays 5-12, 2-4 lines long: disk-achenes cuneate- 

 oblong, quadrangular, prominently 1-nerved on the faces, about 2 lines 

 long ; those of the ray somewhat falcate, obovate, 1-nerved on the sides. 

 Oregon and California to Chili. 



M. raeemosa T. & G. Fl ii, 405. Stems rather slender, 1-4 feet high, 

 pubescent but not glandular, except t nvard the top, paniculately branch- 

 ed above: leaves lanceolate to linear, 1-6 inches long: heads short-pedun- 

 cled or sessile, somewhat racemosely disposed, 3-5 lines high: rays 2-10, 

 2-3 lines long : disk-achenes flattish, not prominently nerved on the sides ; 

 those of the ray somewhat falcate, not at all nerved on the sides. Com- 

 mon on plains and hillsides, Brit. Columbia to California and Idaho. 



M. capitata Nutt. Trans. Am. Phil. Soc. vii, 387. M. sativa var. con- 

 gesta T. &G. Stems stout, 2-4 feet high, simple, or branched above, pu- 

 bescent with soft-hispid spreading hairs and glands: leaves linear-lanceo- 

 late to linear, 1-6 inches long, pubescent and hispid-ciliate : inflorescence 

 very viscid-glandular: heads sessile, in close capitate clusters, 6-8 lines 

 high : rays 6-12, 2-3 lines long : achenes of the disk almost linear, some- 

 what quadrangular; of the rays oblique-pynform. In fields and waste 

 places western Oregon to California. 



M. dissitiflora T. & G. Fl. 405. " A slender twiggy plant 6-15 inches 

 high : stems as well as the lanceolate-linear leaves hirsute-pubescent; the 

 branches g'andular : heads scattered few-rlowered, scarcely 3 lines in diam- 

 eter, with inconspicuous rays : bracts of the involucre 5-8, very glandular : 

 disk-flowers 3-6 : achenes all flat and scarcely or not at all angled on the 

 sides. Blue Mountains and plains of Oregon." 



M. glomerata Hook. Fl. ii, 24. Stems rather slender, 1-2 feet high, 

 simple, or branched near the top, pubescent with coarse somewhat spread- 

 ing hairs, glandular only near the top: leaves linear-lanceolate to linear, 

 1-3 inches long, often sparingly denticulate, ciliate near the base, pubescent 

 both sides with fine appressed hairs : heads small, in close glomerules, very 

 viscid-glandular; rays 1-5 or sometimes none, not surpassing the 3-5 disk- 

 flowers : achenes narrow, 2 lines long or more ; those of the disk 4-5-angled ; 

 of the ray flat somewhat curved and 1-nerved on each face. Common from 

 Brit. Columbia to California and the Eocky Mountains. 



M. citriodora Greene Bull. Torr. Club ix, 63. Hemizonia eitriodom 

 Gray, Stems simple, with short-pedunculate corymbosely panicled heads 

 or loosely branched and the heads more scattered, cinereously villous-hir- 

 sute and above with small glands interspersed: leaves narrow, mostly en- 

 tire : rays 8-9 exserted, greenish-yellow : scales of the receptacle lightly 

 united into a cup : achenes rounded on the back and with a ventral angle. 

 From Hood River Oregon to northern California. 



