840 



COMPOSITAE (COMPOSITE FAMILY) 



990. 15. bidentoides. 



991. B. Eatoni. 



992. B. Eat 

 V. fal. 



993. B. discoidea. 



hairy, 1 C7n. or more long, icith 2 very slender upioardly 

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

 4i-toothed corolla, and often 2 minute intermediate teeth. 

 (Coreopsis Nutt.) — Shores of Delaware R. and 

 Bay. Sept., Oct. Fig. 990. 



2. B. Eatbni Fernald. Simple or branclied, 

 2.5-0 dm. lii^di ; leaves lanceolate, with long- 

 acuminate tips and slender petiolar bases, 

 coarsely serrate ; outer involucre of 3-5 bracts, 

 inner of 5 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 midril)s, usually with retrorse hairs on 



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

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

 Var. FALL.A.X Fernald. Achenes and awns upwardly 

 oarbed. — With the typical form. Fig. 992. 



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



branched ; leaves ternately divided, slender-ijetioled ; 



leaflets ovate4anceolate, pointed, coarsely serrate ; 



heads small, 5 mm. high; outer involucral Ijracts 



iLSually 4 ; achenes linear-ioedge-shnped, tuberculate or smooth, 



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



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



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



southw' . and south westw. July-Oct. Fig. 993. 



4. B. frondbsa L. (Beggar-ticks.) Stems tall (7 dm. or 

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

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

 divided, lateral ones shorter, less acuminate, all sharply serrate ; 

 heads 1.5 cm. long or less, on slender peduncJes ; 

 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 

 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. ano.mala 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 ; leallets lanceolate, very acute, coarsely serrate, all 



. short-stalked; heads large, 1.5-2.5 cm. broad, sfout-pcdAtncu- 



j n late ; outer involucral bracts 10-16, unequal, about eciualingthe 



^rik^S^)^y. ^^^^ or sometimes longer, coarsely ciliate-hispid ; rays pale 

 yellow ; achenes 9-12 mm. long., obovate- or oblong-cuneate, 

 usually glabrous, but often tuberculate-roughenecl, brown or 

 olive; awns retrorsely barbed, exceed- 

 ing the 4-5-toothed yellow corolla. (B. 

 frondosa Wiegand, not L.) — Moist 

 waste places and roadsides, throughout, 

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

 Fig. 990. 



\'ar. puberula (Wiegand) Greene. Peduncles, leaves, 

 and outer bracts puberulent. — Wise, to vSask. and Mo. 



6. B. c&m5sa (Gray) Wiegand. Stem stout, 8 dm. or 

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

 elliptic, acute, vnth winged ]i('fi<d<'s, rcuularly serrate, or upper entire ; heads 

 few, large, 1 cm. or so high, short-pedunculate ; outer involucre of 0-8 nearly 

 erect linear or htnccolate usually entire unequal large bracts, the longest 2-5 

 times exceeding the disk; rays wanting-' • achenes about 1 cm. long, cuneate, 



994. B. frondosa. 



9'.>r). B. fron. 

 V. anom. 



996. B. viiljjata. 



997. B. coniosa. 



