686 COMPOSITAE 
{ Ray Flowers Conspicuous 
1. B. laevis, (L.) BSP. (Fig. 4, pl. 192.) Larcrr Bur-MARIGOLD. 
Brook SUNFLOWER. Stem branching, more or less erect, or partly reclin- 
ing, smooth, as is the whole plant, 1 to 2 ft. high. Leaves lance-shaped 
with conspicuous teeth at margins, tapering to a slender point at apex and 
tapering or more or less abruptly rounded at base, 3 to 2 in. long, without 
leaf-stalks. Heads numerous on slender stems; rays 8 to 10, golden yel- 
low, showy; inner bracts of the involucre usually shorter than the rays, 
the outer bracts often much longer. Fruit wedge-shaped, armed with 2 
awl-like erect appendages with fine downward pointing barbs. In swamps, 
borders of pools and wet meadows. Aug.-Nov. 
2. B.cernua, L. (Fig. 5, pl. 192.) Smarter Bur-MARIGOLD, Usually 
erect, nearly smooth, + to 3 ft. high. Leaves lance-shaped without leaf- 
stalk, broad and it is attached to stem, unequally toothed. Heads with or 
without rays, which, when present are light yellow; outer bracts of in- 
voluere exceeding the disk, which is globose, the head on a short stem. 
Fruit with 2 barbed points. Wet places, our whole range. July-Oct. 
3. B. trichosperma, (Michx.) Britton. (Fig. 7, pl. 191.) Tat 
TICKSEED SUNFLOWER. (Coreopsis trichosperma, Michx.) Plant much 
branched, smooth, stem obscurely 4-sided, 2 to 5 ft. high. Leaves deeply 
incised, pinnately divided, the leaflets or lobes (3 to 7), lance-shaped, 
toothed, the whole leaf 3 to 8 in. long. Upper leaves may be undivided. 
Heads numerous, the involucre bracts not extending much beyond the disk; 
rays, 6 to 19, broad lance-shaped, obtuse at apex, about an in. long, bright 
yellow. Fruit crowned by 2 triangular sharp upright awl-shaped teeth. 
Swamps, wet places, Mass., and southward. Aug.-Oct. 
tt Ray Flowers Inconspicuous or Wanting 
4. B. bipinnata, L. (Fig. 3, pl. 192.) SpanisuH NEEDLES. Smooth, 
branched, stem 4-sided, 1 to 5 ft. high. Leaves deeply and doubly or tribly 
incised, the principle lobes lance-shaped, themselves deeply toothed or in- 
cised. Heads numerous, nearly cylindric, on slender stems. Outer invo- 
lucre seales linear, equalling the short yellow rays, the latter 3 or 4 in 
number. Fruit 4-angled, with 3 or 4 awl-like barbed awns. Damp soil, 
Rhode Island and southward. July-Oct. 
5. B.connata, Muhl. (Fig. 5, pl. 191.) PurpLe-stemmMeD SwaMP 
BrGGAR-TICKS. Smooth, erect, branched, 4 to 8 ft. high. Leaves lance- 
shaped deeply notched, on long leaf-stalks, 2 to 5 in, long; the lower some- 
times 3 cleft. Heads numerous; rays 1 to 5, inconspicuous or wanting. 
Outer bracts of the involucre extending somewhat above the head, few, 
obtuse. Fruit wedge-shaped with 2 barbed awns. Swamps, wet places, 
common. <Aug.-Oct. 
6. B. comosa, Wiegand. (Fig. 6, pl. 191.) Leary-BRAcTED TICK- 
SEED. Leaves lance-shaped, toothed, tapering at each end. Outer bracts 
of involucre leaf-like, extending very much above the disk, conspicuously 
toothed. Friit with 3 barbed awns. Wet places, Mass., southern New 
York and southward. <Aug.-Oct. 
7. B. discoidea, (T. and G.) Britton. (Fig. 2, pl. 192.) SMALL 
Breacar-Ticks. Lower leaves divided into 3 lance-shaped segments, 1 to 
