226 THE FLORA, 
25 S. Canaden’sis, Canada G. Leaves pointed, rough. Panicle broad. o. 
26 S, Short’ii, Short’s G. Leaves acute, very smooth. Panicle long, narrow. W, 
27 S, pilo’sa, Hairy 8. Hairy, 4-7f. high. Leaves remotely serrulate. N.-J. 8. 
28 S. odo’ra, Sweet S. Stem downy in lines, slender, 2-8f. high. Leaves very en- 
tire, smooth, punctate with pellucid dots. Fragrant. c. 
29 S, tortifo’lia. Twist-lo.S, Stemrough. Lvs. often twisted, not punctate. 8. 
80 8S. altis’sima, Tull S. Stem hairy, 4-6f. Lvs. veiny, rough. Scales acute. ¢, 
81 S. Drummon/dii. Drummond's 8. Stem 1-2f. Lvs. velvety. Scales obtuse. W, 
32 S.rad/ula, Rasp-lv. 8. Stem rough-downy. Lvs. oblong-spatulate. W. 
83 S, ulmifo/lia. Him S. Branchlets hairy. Scales acute. Rays 8 or 4, disk tlow- 
ers 3or4, N. W. : 
84 S. Boot/ii. Boott’s S. Branchlets hairy. Scales obtuse. Rays 2-4, disk flowers 
8-12. S. 
85 S. linoi’des. Flux S. Smoothallover. Scales obtuse. Rays1-4. 12-20%. N, 
86 S, Muhlenber’gii. Muhlenberg’s S. Lvs. large, thin, notched, smooth both 
sides. Heads 15-flowered. N. 
87 S, pat/ula, Spreading S. Lvs. large, thick, very rough on the upper side. 
Stem 2-4f, branches leafy. Heads 20-flowered. N. 
88 S. ellip’tica. Marsh S. Very leafy. Lvs. elliptic. Panicle dense, pyramidal. 
89 S.argu’ta. Saw-lv.S. Leaves few, elliptic, sharply serrate. Panicle spreading, 
40 S. neglec’ta, Neglected S. Leaves few, serrate, lin.-lanceolate. Panicle narrow. 
41 8, Ohien’sis. Ohio 8. Smooth all over. Lvs. obtuse, flat. Corymbed. W. 
42 S. Riddel/lii, Aiddell’s S. Branches, &c., dust-downy. Lvs. acute, concave. 
Heads corymbed. W. 
43 S, corymbo’sa, Corymbed S. Branches corymbed, hirsute. Outer secund. 
44 S, Houghto’nii. Houghton’s S. Hds. few, very large. Otherwise like No. 41. N.-W. 
45 S.rig’ida, Stuff S. Iivs. rigid. Heads very large. Scalesobtuse. Height 3-df. 
46 S. Spithame’a. Dwarf S. Leaves thin, sharp-serrate. Scales acute. Height 
6-12’, Mountains. S. 
47 S. lanceola’ta, Lance-lv. S. Leaves linear-lanceolate, 3-5-veined. Rays 
minute, about 17. Corymbs crowded, fragrant. ¢ 
48 S. tenuifo/lia, Linear-lv. S. Leaves narrow-linear, one-veined. Rays short, 
about 10. More slender, with thinner clusters. ¢. 
2. HELIAN’THUS. Sunflower. . 
Heads many-flowered, rays neutral, disk-florets perfect. Scales of ‘he 
involucre in several rows, more or less imbricated. Torus flat or convex, 
the chaff persistent, embracing the 4-sided, flattened achenia. Pappus of 
2, chaffy awns, deciduous.—Herbs, mostly 21, rough. Leaves opposite, the 
upper often alternate, mostly 8-veined. Heads mostly large, the disk 
from half an inch to 1f. broad. Rays yellow, disk yellow or purple. July- 
Oct. (Figs. 498, &c.) 
