CARDUACEAE 1479 
S. e nae Pare Plant annual, glabrous, the ste em, 1-9 dm. tall: leaf- 
blades 3-20 ong, the lateral VA cuneate to suborbicular, coarsely 
pu the ferminal lobe rather large: 
volue 4—6 ong; bracts n Ni 
inr P linear lanceolate: eae ules 4-8 mm. 
long: achene 1.5-2 m , pubescent on 
i S 
bottoms, various provinees, Fla. to 
Tex., Mo., Ill, and N. C.—(Mez.)—Spr.- 
fall.—The form with few-lobed broad ter- 
minal ae cane has been described as 
S. ane called BUT- 
TER-WEE 
S. vulgaris L. Plant annual, sparingly 
d the stem 5 dm. tall or le ess, hollow, 
eorymbos EA Pan ar blades mo pi 1 
les 
dm obes and rachis 
toothed, the id lobe cca m involuere 6-8 mm 
row, acuminate: ligules wanting: achene about 2.5 mm 
cent all ov (CoMMON-GROUNDSEL.)—Cullt, grounds and Lo ne Various 
provinces, rarely Coastal Plain, N. C Tex., Ont., and 
Paeifie Coast. at. E Sp dd viscosus 
vulgaris and strong-scented, with wholly green aoled] bracts and incon- 
spicuous ray-flowers, has een reported from N. C. It is a native of Eu. 
3. S. Rugelia A. Gray. des 2—5 dm. tall: leaf- ser ovate to elliptic-oval, 
8-15 em. DE denticulate or dentate: braets of the involuere linear-lanceolate, 
lon Hi igh 
12-13 m ong: disk-cor uo T- 8 mm. long: inae a 6 mm. long.— 
mt. ence Be Ridge, N. C. and Tenn.—Sum 
4, S. Robbinsii Oakes. Plant ane ap e blades of the basal leaves 3-8 
em. long, acute: involuere 6-8 m ong; braets i uu t ligules 4-5 
mm. long: achene pubescent. Mt. Ede “Roan Mt. e Blue Ridge of 
N. C. and Tenn., and more N e., N. Y. to Que. E —Sum.. 
5. us r Plant 3-7 dm. tall: ee i the basal leaves 2-12 cm 
En jode the apex: involucre 6-7 ong; braets linear, fully 1 mm. 
wide: ligules iode 9.0—/.5 mm. lon achene glabrous. —Low grounds, 
ng: 
swamps, and wet woods, various provinees, Fla, to Tex. Ont, and Newf.— 
Spr.-sum. 
6. S. gracilis Pursh. Plant similar es that of S. aureus in jane but smaller 
a e slender: involuere 3.5-4.5 mm. long; bracts narrowly linear, scarcely 
lr vide: xd S broad, 3.5-5 mm. long -—Wet grounds, various provinces, 
Ga. m Pa— 
7. S. rotundus (Britton) Small Pl es - 6 dm. tall: blades of the basal 
-o pee ular to orbicular-ovate, sely crenate-serrate: i 4—5 
long; bracts linear-subulate to enr piens ligules 8-10 m ng.— 
I grounds or wet rocks, various provinces, La. to Tex., Mo., and Ohio —Spr. 
. S. obovatus Muhl. Plant 1-5 dm. tall: blades of the basal leaves spatu- 
ju A idu eoarsely toothed or some of them lyrate- cupri Ended 
4-5 m : br aets narrowly linear or M dr ligules . long. 
— Thicket ‘and dry hillsides, various provinces, W Fla. to Tex., vi. an ad Me.— 
Spr.— 
9. S. pauperculus Michx. Plant 2-6 dm. tall: blades of the basal leaves 
elliptic to oval, varying ovate or obovate, serrate, incised-serrate or partly 
