304 COMPOSIT A EUTHAMIA 
S. Missouriensis Nutt. Journ. Acad. Philad. vii, 32. Smooth and 
glabrous: stems a foot or more high, simple or sometimes — fastigjately 
branched at the summit: leaves rigid, crowded, often fascicled in the upper 
axils, linear-lanceolate, acute, with very scabrous margins, the lower tap- 
ering to the base, sharply and sparsely serrulate toward the apex: the 
radical oblong-spatulate, petioled, 3-5-nerved, reticulated. the uppermost 
entire and scarcely if at all nerved: racemes rather dense, slender at length 
recurved-spreading, forming a short. and crowded pyramidal panicle; 
bracts imbricated : rays 6-10, rather short, achenes slightly pubescent. Dry 
prairies, Idaho to the Assiniboine and the southeastern states. 
S. serotina Ait. Hort. Kew. iii. 211. Stems stout, 2-8 feet high very 
smooth and glabrous up to or near the ample secund panicle: leaves 
lanceolote or broader, 8-10 inches long, sharply and saliently serrate, 
glabrous both sides: heads very numerous, crowded: rather large and full, 3 
lines high: bracts of the involucre broadly linear-oblong or linear: rays 
7-14, conspicuous achenes more or less pubescent. In rich alluvial lands, 
Oregon to British Columbia and eastward . 
S. elongata Nutt. Trans. Am Phil. Soc. xii, 327. Stems rather 
slender, 2-4 feet high, smooth or minutely pubescent, strict: leaves lanceo- 
late, acute or acuminate at both ends, sparingly serrate, nearly glabrous, 
obscurely 3-nerved : panicle elongated, virgate or narrowly pyramidal, 6-10 
inches long, the racemes at length somewhat spreading: bracts of the in- 
volucre linear-subulate: rays small and slender: achenes pubescent Com- 
mon in dry grounds, Kritish Columbia to California. 
S. Californica Nutt.1l.c. Stems rather stout, 2-4 feet high canescent- 
ly peberulent or pubescent: leaves oblong or the upper oblong-lanceolate 
and the lower obovate, obtuse or apiculate, entire or the lower with some 
small teeth, canescently puberulent or beneath more pubescent: panicle 
virgate, 4-12 inches long, dense, the racemiform clusters erect or barely 
spreading in age, when elongated mostly secund and even with the apex 
at length recurved, heads 3-4 lines long: bracts of the involucre lanceolate 
oblong or oblong-linear, mostly obtuse, externally somewhat »uberulent: 
rays 7-!2 fewer than the disk-flowers: achenes minutely pubescent. Dry 
epee southern Oregon to California, the borders of Nevada and 
exico. 
12 EUTHAMIA Cass Dict. xxxvii, 471. 
Erect scabrous perennials with narrow alternate leaves and 
numerous small heads of yellow flowers in terminal’ corymbose 
panicles. Heads many-flowered, the ray flowers more numer- 
ous than those of the disk, and néver surpassing them in 
height. Receptacle fimbrillate or the alv oli pilose. Achenes 
villous- pubescent, short and turbinate. | 
E. occidentalis Nutt Trans. Am. Phil. Soc vii, 326. .Stems numer- 
ous from extensively ereeping rootstocks, 2-6 feet high, loosely branched, 
the branches terminated by small clusters of mostly pedicellate heads: 
leaves numerous, linear, entire, smooth, usually 3-nerved, the margins ob- 
scurely scabrous: bracts of the involucre linear-lanceolate, acute: rays 16- 
20; disk flowers 8-14: alveoli of the receptacle pilose. 
Subtribe i. Heterochromeer Gray. Syn. Fi. i pt. 2 54. Ray 
flowers blue. red or perple to white rar lu vellow or wanting in cer 
tain species Disk of hermaphodite and mostly fertile flowers, thetr 
