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very likely due to the action of the insects. The plants were generally only 2 to 3 
dm. high. Collected 15 miles south of Whitman, August 3 (No. 1640). 
Helianthus grosse-serratus Martens, Sel. Sem. Hort. Lovan, 1839. 
The leaves of my specimens are shorter and less coarsely serrate than usual: 
Mullen, September 14 (No. 1767). 
Bidens levis (L.) B.S. P. Cat. PLN. Y. 29 (1888); Helianthus levis L. Sp. PL. ii, 906 
(1753). 
Ihave been in doubt whether to place our Nebraska specimens with B. levis or 
with B.cernua. The heads are little nodding if at all, but the rays are much shorter 
than in the true B. levis and the outer bracts often longer than the heads. Common: 
Mullen, August 17; Thedford, August 26 (No. 1696). 
Bidens frondosa L. Sp. Pl. ii, 832 (1753). 
Thedford, August 19 and 26; Halsey, September 11 (No. 1707). 
Bidens trichosperma tenuiloba (Gray) Britton, Bull. Torr. Club, xx, 281 (1893); 
Coreopsis trichosperma tenuiloba Gray, Syn. F1. i, pt. ii, 295 (1884). 
Some specimens not yet in bloom, with broader lobes, were collected in Grant 
County, August 3, These may be the true Bidens trichosperma or, perhaps, B, inrolu- 
erala, Thedford, August 19 to 26; Cody’s Lakes, August 10 (No. 1642), 
Thelesperma gracile (Torr.) Gray, Kew Journ. Lot. i, 252 (1849); Bidens gracilis 
Torr. Ann. Lye. N. Y. ii, 215 (1828), 
On the sand hills: near Dismal River, July 28; Plummer Ford, July 3; Mullen, July 
17 to 24 (No, 1444), 
Hymenopappus filifolius Hook. Fl. Bor. Amer. i, 317 (1834), 
This appears to be the original H. filifolius of Hooker. Gray includes also H. luteus 
Nutt. in this species, which I think makesita very complex one. Then H, tenwifolius 
could, with perhaps equal right, be included also. Our specimens have always yel- 
low flowers and are scarcely scapose. Mullen, July 17; 20 miles south of Whitman, 
August 5 (No. 1554), No. 1321 is a more leafy form with larger, more or less corym- 
bose heads. Thedford, June 16; Mullen, July 17; Plummer Ford, July 8; Dismal 
River, June 27, 
Helenium autumnale L. Sp. PL ii, 886 (1753). 
Common: along the South Dismal River, August I4; Plummer Ford, August 22 
(No. 1690), 
Artemisia biennis Willd. Phytogr. 11 (1794). 
All my specimens are weak and bright green, and seem to be annual, In dry lakes 
northwest of Whitman, September 19 (No. 1779). 
Artemisia frigida Willd. Sp. Pl. iii, 1838 (1803). 
On a dry hill, south of Thedford, August 8 (No, 1733). 
Artemisia canadensis Mx. I'l. ii, 128 (1803), 
Sandy prairie, Thedford, August 26 and September 8 (No. 1730), 
Artemisia gnaphalodes Nutt. cen. ii, 143 (1818), 
The relationship between this and 4. ludoviciana of Nuttall is a little obse ure, but 
as A. gnaphalodes appears first on thet page in the Genera, it must be regarded as the 
species, and must retain its name, even if the two are regarded as one species, 
Thedford, August 26 (No. 1725). 
Senecio compactus (Gray) Rydberg, Bull. Torr. Club, v, 512 (1894); Senecio 
aureus compactus Gray, Syn. FL. i, pt. ii, 391 (1884), 
My specimens differ in having a more open cyme of fewer heads. The narrow, 
fleshy, and stiff leaves, toothed only at the apex, present a conspicuous character, 
which makes it, I believe, deserving of specific rank. Sand hills: Thedford, June 
15, 16, and 19 (No. 1311). 
