2 B. frondosa L. Hds. discoid; outer invol. C times as long as the flower, its leaflets ciliate at base; lower lvs. pinnate, upper ones ternate, lanceolate, serrate; ach. 1-awned. - (1) A common weed, in moist, cultivated fields throughout Can. and U. S., often called Beggar-ticks from the 2-horned achenia which adhere to every passer-by. St. 2f high, diffusely branched. Lower lvs. in 2s or 5s. Fls. in clusters at the end of the branches, without rays, yellow, leafy. Aug., Sept.
3 B. connata Willd. Hds. discoid, smooth; lvs. lanceolate, serrate, slightly connate at base, lower ones mostly trifid; outer scales longer than the head, leafy; ach. with 3 awns. - (1) In swamps and ditches, Can. N. Fng., to Mo. St. 1 to 3f high, smooth and 4-furrowed, with opposite branches. Lvs. thin, taper-pointed, often all undivided. Hds. scarcely ever with a ray. Aug. (B. tripartita, Bw.)
4 B. cernua L. Hds, subradiate, cernuous; outer invol. as long as the flower; lvs. all simple, lanceolate, subconnate, dentate. - In swamps and ditches, Can. to Pa. and Wisc. St. 1 to 2f high, purplish, branched, round at base, striate above. Branches opposite. Lvs. opposite, somewhat connate at base. Fls. yellowish green, finally drooping, generally with small yellow rays about 8 in number. Aug., Oct.
5 B. chrysanthemoides L. Rays 3 times as long as the nearly equal invol.; lvs. oblong, attenuate at each end, connate at base, dentate. - (1) A low plant, with large, yellow-rayed flowers, in muddy places, Can. and U. S. Stem 6 - 20' high, round and smooth. Leaves smooth, with few remote teeth, narrow, opposite, with narrow, connate bases. Flowers commonly erect, rays about 8, large, spreading Scarcely distinct from B. cernua. Sept., Oct.
6 B. Beckii Torr. St. subsimple; submersed lvs. capillaceous-muliifid; emersed ones lanceolate, connate, acutely serrate or lanciniate; fls. radiate; rays longer than the involucre. - Ц. In water, N. Y. (Sartwell), etc. Vt. (Chandler), N. to Can. Stem 2 - 3f long, simple or with minute, slender branches above. Lower leaves dissected as in Ranunculus aquatilis; upper 1 - 2' long, 1/2 as wide, deeply serrate. Head solitary, terminal, yellow. July, Aug.
59. ACMEL'LA, L. (Gr. , a point; from the sharp taste of the foliage?) Heads radiate; involucre shorter than the disk, double, appressed, pubescent; receptacle, conical, chaffy; pales embracing the ilowers; rays about 12, ?, disk ; achenia compressed, those of the ray angular, mostly awnless. - (1) Herbs with an acrid taste, opposite
Ivs., solitary, yellow heads. Tropical.
A. repens Pers. St. decumbent, rooting at the lower joints, diffuse; lv3. lanceolate or oblong-lanceolate, acute at each end, petiolate, more or less serrate; hds. solitary, on axillary and terminal peduncles; scales lance-ovate; rays 10 to 12.- Wet places, S. Car. to Fla, Sept., Oct. (Spilanthes Nuttalhi, T. & G.)
60. VERBESI'NA, L. Crown-beard. Heads few or many-flowered; rays ♀, few or none, disk ; scales in 2 or more series, imbricated, erect; chaff concave, or embracing the flowers; achenia compressed, 2 - awned. - Ц American plants, sometimes shrubby. Lvs. often decur-rent, serrate or lobed. Hds. solitary or corymbous,
1 V. siegisbeckia Mx. St. 4-winged; lvs. opposite, ovate or lance-ovate, serrate, acuminate, triple-veined, tapering to a winged petiole, hds. radiate, in trichotomous cymes; rays 1 to 5; ach. wingless; fls. yellow. - Roadsides and dry fields, W. and S. States, common. St. 4 to 6f high. Lvs. 5 to 8' by 3 to 4', thin. Hds. about 25-flowered, with yellow corollas, and yellow, lanceolate rays, the latter about 9" long. Aug., Sept. (Coreopsis alata Ph. Actinomeris alata Nutt.)
2 V. Virginica L. St. narrowly-winged, pubescent above; lvs. alternate, lanceo-late or lance-ovate, subserrate, scabrous, acute or acuminate, tapering to the sessile base; lower ones decurrent; corymbs compound, dense; rays (oval) and disk-fls. white; ach. winged. - Dry woods, Penn. to La. Stem 3 - 5f high, and leaves beneath often more or less tomentous. Heads about 20 - flowered, the 3 or 4 rays scarcely 1/2' long. Aug. Sept.
3 V. sirmata Ell. St. wingless, striate-angled, pubescent; lvs. alternate, ovate, acuminate, contracted to a long, slender base, irregularly repand-toothea[and some of them sinuate-lobed or pinnatifid; hds. corymbous ; rays 3 to 5, oval, and with the disk white; ach. broadly winged. - Sandy soil, S. Car., Ga. (Feay), Fla. St. 2 to 4f high, with ample, coarse lvs. Hds. similar to the last, about 12-flowerod. Lvs. feather-veined. Sept. - Nov.
61. DYSO'DIA, Cav. False Dog-fennel. Heads many-flowered; lays ♀ ; disk ,♂; involucre of a single serifs of partially united scales, usually calyculate ; achenia elongated, 4-ang!cd, compressed ; pappus scales chaffy, in one series, fimbriately and palmately cleft into bristles. -(1) Herbs with large, pellucid glands. Lvs. mostly opposite and pinnately parted or toothed. Hds. paniculate or corymbous. Fls. yellow.
D. chrysauthemoides Lagasca. St. glabrous, much-branched; lvs. pinnately parted, lobes linear, toothed; hds. terminal on the shortbranchlets; scales united . at base, scarious, obtuse, with large, oblong glands; outer scales 7 to 9, linear; pappus bristles slender, as long as the involucre. - Prairies and roadsides, I11, Mo., to La. An ill-scented plant, about If high, with finely divided lvs. Aug.- Oct. (Tagetes papposa Vent.)
62. GAILLAR'DIA, Fougeronx. Heads radiate; rays neutral; scales in 2 or 3 series, acute, leafy, spreading, outer largest; receptacle convex, fimbrillatc (naked in the following species) ; rays cuneiform, 3-cleft; achenium villous with long hairs from its base ; pappus of 6 to 10 long awns, which arc membranous at base. - Lvs. alternate, entire, often dotted. Hds. on long, naked peduncles.