696 COMPOSITAE 
Rays present, yellow, 
Flower heads solitary or very few . . . . - ~- « « S. pseudo-arnica 
Flower heads several or numerous. 
Basal leaves not heart-shaped. 
Plant densely woolly . . © is 0 ve Sa), POMEHEASS 
Plant not woolly or-only at base. 
Basal leaves inversely egg-shaped . . . S. obovatus 
Basal leaves oblong, narrow . . . . . S. balsamitae 
Basal leaves heart-shaped at base. 
Basal leaves lance-shaped . . . . . . S. Robbinsit 
Basal leaves broad, rounded .... . . S. aureus 
Rays absent or minute. 
Stem not hairy or only slightly so, 
Involucre naked or nearly so . - » « S.usplochcus 
Involucre with a row of ae bracts at base | - 2 « © S. vulgaris 
Stem viscid downy .. . . SS. viscosus 
1. §. pseudo-arnica, Less. (Fig. i. a 196.) Shi Behe SENECIO. 
Root perennial, stem 6 to 30 in. high, stout; whole plant white woolly, 
sometimes becoming smooth. Leaves oblong tapering to a narrow base, 
acute or obtuse at apex, margins sinuate, densely woolly beneath, 4 to 8 
in. long. Heads solitary or occasionally 3 or 4 or even more, 1 to 2 in. 
in diameter; rays 12 to 15, broad, 3-toothed. Sea-beaches, Maine. July- 
Aug. 
2. §. tomentosus, Michx. (Fig. 5, pl. 196.) Wootty RaAGweep. 
Root perennial; stem 1 to 24 ft. high; plant covered with whitish wool. 
Root leaves oblong not heart-shaped at base, rounded at apex, toothed 
at margins, on long leaf-stalks, the upper without leaf-stalks, similar in 
form to the lower or deeply lobed on each side. Heads in a broad flat 
cluster, each on a long stem, 2 in. broad; rays 10 to 15. Moist soil, 
southern part of our area. April-June. 
3. S. obovatus, Muhl. (Fig. 2, pl. 196.) Rounp-LEAF SQUAW-WEED. 
Stem 1 to 2 ft. high, smooth or somewhat woolly toward the base. Basal 
leaves round or inversely egg-shaped, toothed in a circular tuft; stem 
leaves few and small. Heads several 4 in. broad on slender stems; rays 
8 to 12. Wet soil, Maine to Penna., and southward. April-June. 
4, §. balsamitae, Muhl. (Fig. 7, pl. 196.) BALSAM GROUNDSEL. 
Stem 10 to 20 in. high, somewhat woolly below and at the leaf-axils. Root 
leaves tufted, oblong or spatula-formed or lance-shaped, deeply lobed on 
each side of the mid-rib. Heads rather numerous, small; rays 8 to 12. 
Dry soil, throughout our area. May-July. 
5. §. Robbinsii, Oakes. (Fig. 6, pl. 196.) Ropin’s SQUAW-WEED. 
Smooth; 1 to 24 ft. high, stem slender. Lower leaves lance-shaped, some- 
what heart-shaped or simply rounded at base, acute or blunt at apex, 
toothed, on long leaf-stalks, upper leaves similar but often lobed, especially 
toward the base. Rays 6 to 12. Swamps and wet meadows, Maine, Ver- 
mont, New Hampshire and New York. June-Sept. 
6. §S. aureus, L. (Fig. 1, pl. 196.) GOLDEN RaGcwort. SQuAw- 
WEED. Root perennial; stem slender, 1 to 24 ft. high. Basal leaves round 
or egg-shaped, heart-shaped at base, toothed at margins, on long leaf- 
stalks; upper leaves small, lance-shaped, toothed or deeply lobed. Rays 
8 to 12, deep golden yellow. Swamps; wet meadows, throughout our area. 
May-July. 
Heads without Ray-flowers or with very minute ones 
7. §. vulgaris, L. (Fig. 3, pl. 196.) Common GrounpseL. Annual. 
