MADIA  COMPOSITA 847 
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, 186. Commonly robust, 1-3 feet high, 
pubescent with slender somewhat viscid hairs and beset with pedicillate 
lands: leaves from broadly lanceolate to linear: heads commonly short- 
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. racemosa T. « G. Fl ii, 405. Stems rather slender, 1-4 feet high, 
pubescent but not glandular, except toward 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- 
esta T. &G. Stems stout, 2-4 feet high, simple, or branched above, pu- 
yescent 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-pyriform. In fields and waste 
places western Oregon to California. 
_M. dissitiflora T, & G. Fi. 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-flowered, scarcely 3 lines in diam- 
eter, with inconspicuous rays: bracts of the involucre 5-8, very glandular: 
disk-flowers 3-6: achénes 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, 
“Lee he 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 I-nerved on each face. Common from 
Brit. Columbia to California and the Rocky Mountains. 
M. citriodora Greene Bull. Torr. Club ix, 63. Hemizonia citriodora 
Gray, Stems simple, with short-pedunculate corymbosely panicled heads 
or loosely branched and the heads more scattered, cinereously villous-hir- 
sute and above with smal! glandsinterspersed: 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. 
