COMPOSITAE (COMPOSITE FAMILY) 



841 



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

 punctate ; awns nearly f as long as the achene, equaling the 4-toothed pale-yellow 

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

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



Var. acuta Wiegand. Leaves subsessile ; heads larger ; outer bracts shorter 

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

 and Kan. 



7. B. connata Muhl. (SWAMP BEGGAR-TICKS.) Tall arid 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 of 4 or 5 short entire bracts; rays golden-yellow, generally 

 f7/*T wanting ; achenes 4-6 mm. long, cimeate, the outer 3-angled and 

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



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



398 B connata 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. HermepinCo., 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, 999 B cerima 

 throughout. July-Oct. (Eu.) FIG. 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. (B. 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 l-S-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. FIG. 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, broadly cuneate, 3-4.5 mm. long, with 2 very short blunt 

 spreading teeth. (Coreopsis aurea Ait.) Wet ground, Va. 

 toFla. FIG. 1001. 



12. B. trichospSrma (Michx.) Britton. (TICKSEED SUN- 



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



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



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



only 3-5-cleft and almost sessile ; heads panicled-corymbose ; rays 



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



1002 B trich inner ones wedge-linear, 5-7 mm. long, smooth or sparsely hairy, 



marginless, crowned with 2 erect triangular or awl-shaped stout 



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



to 111. and Ky.; said to extend northwestw. to Minn. Aug.-Oct. FIG. 1002. 



1000. B. bipin. 



1001. B. coronata. 



