COMPOSITAE (COMPOSITE FAMILY) 



841 



B. cerniia. 



olive or brown, nearly glabrous, obscurely nerved or nerveless, sometimes 

 punctate ; awns nearly J as long as the achene, equaling the i-loothed pale-yellow 

 corolla. (B. connata, var. Gray.) —Sandy shores and rich soil, N. E. to Minn., 

 westw. and southw. Sept., Oct. Fis. 997. 



^S'l'- acita Wiegand. Leaves subsessile ; heads larger ; outer bracts sbortei 

 (barely twice exceeding the disk), spreading, acute. (B. acuta Britton.) — Mo. 

 and Kan. 



7. B. connata Muhl. (Swamp Beggak-ticks.) Tall and branching, 0.5-1.5 

 m. high ; leaves bright green, undivided or some of the lower deeply parted, 



lanceolate or elliptic, large, acuminate, slender-petioled, coarsely 

 serrate ; heads about 1 cm. high, short-pedunculate ; outer invo- 

 lucre ofi or 5 short entire bracts; rays golden-yellow, generally 

 wanting ; achenes 4-6 mm. long, cuneate, the outer 3-angled and 

 3-awned, inner 4-angled, 4-awned ; awns barely half as long as 

 the achene, retrorsely barbed, equaling the b-toothed corolla. — 

 B tonnata Swamps and ditches, N. E. to Minn, and Mo. Sept. (Estab- 

 lished in Eu.) Fig. 998. 

 Var. pinnata Wats. Leaves nearly all pinnately divided, the 5-7 divisions 

 sparingly incised; achenes 4-awned. — Hennepin Co., Minn. (^F. L. Couillard). 



8. B. cSrnua L. (Stick-tight.) Smooth or hispidulous, 

 2-7 dm. high ; branches short ; leaves lanceolate to linear- 

 lanceolate, acuminate, unequally serrate, connate at base; 

 heads erect in anthesis, short-pedunculate ; outer involucre 

 longer than the head; rays, when present, one half exceeding 

 the disk or longer ; achenes wedge-obovate, 5-6 mm. long, 

 4-awned, 4-angled, retrorsely- barbed, tuberculate on the angles, 

 and prominently many-nerved ; awns half as long as the achene, 

 shorter than the yellow 5-toothed corolla. — Wet places, 

 throughout. July-Oct. (Eu.) Eig. 999. — Very variable. 



9. B. laevis (L.) BSP. Smooth, erect, or reclining at base, 1 m. or less high : 

 leaves lanceolate, tapering at both ends, sessile, rarely connate finely and regu- 

 larly serrate; outer involucre mostly shorter than the showy golden-yellow 

 (2-3 cm. long) rays; achenes 6-9 mm. long, wedge-shaped, retrorsely almost 



serrate on the margins; awns 2, 3, or 4, downwardly barbed, 

 barely f as long as the achene, and hardly equaling the yellow 

 5-toothed disk-corolla. (jB. chrysanthemoides Michx.) — Swamps 

 near the coast, Mass., and southw.; also centr. N. Y. Aug.-Oct. 



10. B. bipinnata L. (Spanish Needles.) Smooth annual, 

 branched ; leaves IS-pinnately parted, petioled ; leaflets ovate- 

 lanceolate, mostly wedge-shaped at the base ; heads small, on 

 slender peduncles ; outer involucre of linear bracts equaling the 

 short pale yellow rays; achenes 4-grooved, nearly smooth, 3-4- 

 awned, very unequal. — ^Damp soil, R. I., westw. and southw.; 

 occasional on ballast northw. Eig. 1000. 



11. B. coronata (L.) Fisch. Nearly glabrous, 3-9 dm. high ; leaves variable, 

 commonly 3-7 -divided, or all undivided, the segments incisely serrate or lobed ; 

 rays golden-yellow, showy ; achenes flat, 1-nerved on each 

 face, broadlv cuneate, 3-4.5 mm. long, with 2 very short blunt 

 spreading teeth. {Coreopsis aurea Ait.) — Wet ground, Va. 

 to Fla. Fig. 1001. 



12. B. trichospgrma (Miohx.) Britton. (Tickseed Sdn- 



FLOWER.) Smooth, branched ; leaves Short-peti- 



kj oled, nearly all 3-7-divided ; leaflets lanceolate 



M or lance-linear, cut-toothed, or the upper leaves 



ill only 3-5-oleft and almost sessile ; heads panicled-coryinbose ; rays 



W conspicuous, golden-yellow; achenes narrowly wedge-oblong or the 



. , inner ones wedge-linear, 5-7 mm. long, smooth or sparsely hairy, 



1002. B. lie . jnjjj.giniess, crowned with 2 erect triangular or awl-shaped stoul 



teeth. (Coreopsis Michx.) — Swamps, Mass. to Va. near the coast ; also N. Y. 



to 111. and Ky.; said to extend uorthwestw. to Minn. Aug.-Oct. Fio. 1002. 



1000. B. blpin. 



1001. B. coronata. 



