840 



COMPOS1TAK (COMPOSITE FAMILY) 



990. B. biclentoides. 



2. B. Eat., 



B. discoidt-u 



hairy, 1 cm. or more long, with 2 very slender upwardly 

 roughened awns (6-8 mm. long} surpassing the yellowish 

 ^-toothed corolla, and often 2 minute intermediate teeth. 

 (Coreopsis Nutt.) Shores of Delatoare R. and 

 Bay. Sept., Oct. FIG. 990. 



2. B. Eatbni Fernald. Simple or branched, 

 2.5-6 dm. high ; leaves lanceolate, with long- 

 acuminate tips and slender petiolar bases, 

 coarsely serrate ; outer involucre of 3-5 bracts, 

 inner of "> oblong conspicuously striate ones 1 cm. long ; rays 

 none ; disk-flowers 15-25 ; inner achenes 7-9 mm. long, 1-1.7 

 mm. broad, with strong midribs, usually with retrorse hairs on 



the margin ; the 2-4 awns 8-4.5 mm. long, downwardly barbed. 

 Brackish shores, lower Merrimac R., Mass. Sept., Oct. FIG. 991. 

 Var. FALLAX Fernald. Achenes and awns upwardly 

 barbed. With the typical form. FIG. 992. 



3. B. discoidea (T. & G.) Britton. Diffusely 

 branched ; leaves ternately divided, slender-petioled ; 

 __ leaflets ovate-lanceolate, pointed, coarsely serrate ; 

 heads small, 5 mm. high; outer involucral bracts 

 usually 4 ; achenes linear-wedge-shaped, tuberculate or smooth, 

 bearing a pair of short and stout upwardly barbed awns of the 

 length of the orange 5-toothed corolla. (Coreopsis T. & G.) 

 Wet banks and swamps, Mass, to Mich., 111., 

 south w. and south westw. July-Oct. FIG. 993. 



4. B. frondbsa L. (BEGGAK-TICKS.) Stems tall (7 dm. or 

 less in height), paniculate-branched; leaves 3-5-divided, gla- 

 brous, the terminal leaflet long-stalked, acuminate, often again 

 divided, lateral ones shorter, less acuminate, all sharply sen ate ; 

 heads 1.5 cm. long or less, on slender peduncles,' 

 outer involucre of 5-8 ciliate bracts; rays small, 

 yellow; achenes narrowly cuneate, 7-10 mm. long, 

 black, strongly 1-nerved on each face, often slightly 

 994. B. frondosa. hairy, the retrorsely barbed slightly divergent slender 

 awns barely half as long, exceeding the 5-toothed 

 orange corolla. (B. melanocarpa Wiegand.) Common in damp 

 ground, throughout. Aug., Sept. FIG. 994. Var. ANOM A LA Porter. 

 Awns upwardly barbed. Local, N. S. to Pa. FIG. 995. 



5. B. vulgata Greene. (BEGGAR-TICKS, STICK-TIGHT.) Stem tall (often 

 1.5 m. high) and branching, glabrous ; leaves pinnately 3-5-divided, slender- 

 petioled, nearly glabrous; leaflets lanceolate, very acute, coarsely serrate, all 

 short-stalked; heads large, 1.5-2.5 cm. broad, stout-pi ihnn-n- 

 late; outer involucral bracts 10-16, unequal, about equaling the 

 disk or sometimes longer, coarsely cil fate-hispid ; rays pale 

 yellow ; achenes 9-12 nun. f<>n</, obovate- or oblong-rum r< . 

 usually glabrous, but often tuberculate-roughened, brown or 

 olive; awns retrorsely barbed, exceed- 

 ing the 4-5-toothed yellow corolla. ( />. 

 frondosa Wiegand, not L.) Moist 

 waste places and roadsides, throughout, 

 but less common eastw. than the preceding. Aug. -Oct. 

 KM;. 996. 



Var. pub6rula (Wiogand) Greene. Peduncles, leaves, 

 and .nitrr lira.-ts piiberiilent. Wise, to Sa.sk. and Mo. 



(i. B. com6sa (Gray) Wiegand. Stem stout, 8 dm. or 

 less in height, glabrous ; branches short ; leaves pale, 

 elliptic, acute, with winged petioles, regularly sen-ate, or upper entire; heads 

 t'cw, large, 1 cm. or so high, short-pedunculate; outer inmlwre 0/6-8 nearly 

 erect linear or lanceolate usually entire unequal large bract*, the }<><ti-xt 2-5 

 times exceeding (In- 'link; rays wanting; achenes about 1 cm. long, cuneate, 



f 

 ' ' 



996. B. viil-;ii.-i. 



, V(T 



