15 H. cinereous. . SULLIVANTH Torr. & Gr. Rough, cinereous-pubescent; st. virgate, somewhat naked and branched above; lvs. opposite (the upper often alternate), ovate-oblong, narrowed to the sessile base, the lower to a winged petiole; scales lanceolate, canescent, pales pointed, with 2 lateral teeth. - Ohio (Suliivaut). St. 2 to 3f high. Hds. as large as in No. 14.

16 H. decapetalus L. Lvs. opposite, ovate, acuminate, irregularly toothed, thin, 3-veined, scabrous above, smooth or nearly so beneath, on winged petioles; scales lanceolate-linear, subciliate spreading, nearly equal; rays 9 to 12, pale yellow.- Copses, along streams, Can., N. Eng. and Middle States. St. 3 to 4f high, purplish. Invol. varying in all degrees of leanness between the present form and the variety following. Aug.†

. frondosus. Outer scales larger and leaf-like. (H frondosus L.)

17 H. tracheliifolius Willd, Lvs. opposite, those of the branches mostly alternate, thin, scabrous both sides, tripli-veiued, appressed-serrate, acuminate, petiolate, lower ones ovate, middle lance-ovate, upper lance-linear; scales lance-linear, attenuate-acuminate, longer than the disk, loosely spreading, ciliate; chaff slightly 3-toothed; rays 12 to 15. - Tall, handsome, in thickets, etc, Ohio to I11. and Tenn. St. purplish, 3 to 8f high. Lvs. 3 to 6' long. Hds. middle size, at top of the slender, suberect branches. Rays expanding 2 to 3'.

18 H. doronicoides Lam. St. branched, rough or hirsute above; lvs. opposite, petiolate, the upper alternate and subsessile, ovate and ovate-lanceolate, acuminate, tripli-veined, serrate, very scabrous above, smooth and pubescent beneath; scales lance-linear, ciliate, longer than the disk; rays 12 to 15.-W. and S. States. Also at Ponghkeepsie, N. Y. (W. R. Gerard.) St, 4 - 7f. Lvs. 3 to 10' by 1 to 3'; petioles 1/4 to 1' long. Rays very showy, 15 to 20" by 4 to 6". Jl. - Sept.

. plena-flora. Fls. all radiate. - Gardens. A handsome flower, somewhat like a yellow Dahlia. ‡

19 H. strumosus L. St. smooth below, scabrous above; lvs. ovate-lanceolate, short petioled, all similar, acuminate, finely serrate, scabrous above, smooth or tomentous-canescent beneath; hds. few, about 10-rayed; scales ciliate, equaling the disk, squarrous-spreading at tip. - Ц Grows in swamps, etc, Can. and U. S. St. 3 to 5f high, erect, branching above. Lvs. petiolate, with an acute point and close serrature3, the lower surface varying in the degree of pubescence. Rays bright yellow, an inch or more in length. Scales hairy. Jl.

20 H. hirsutus Raf. St. simple or dichotomous above, scabrous, hirsute; lvs,, opposite, petiolate, subserrate, 3-veined, ovate-lanceolate, obtuse at base, acuminate, very scabrous above, hirsute beneath; scales ovate-lanceolate, acuminate, hirsute, as long as the disk; rays 11 - 15. - Dry soils, Western and Southern States. Stem 4 - 7f high, with irregular, alternate branches. Leaves 3 - 10' by 1- 3', petioles 1/2 - 1'long. Rays very showy, 15 - 18" by 4 - 6". Jl. - Sept. (H. diver-sifolius Ell.)

. pubescens. Lvs. tomentous beneath, subsessile. (H. pubescen3 Hook.)

21 H. divaricatrus L. Si. smooth, branching or simple; lvs. nearly opposite, sessile, ovate-lanceolate, 3-veined, scabrous above, smooth beneath; panicle tricho-tomous, slender, few-flowered. - Rocky woods, brook-sides, U. S. and Brit. Am. Stem 5f high, glaucous. Leaves rather abrupt at base, tapering to a long, acute point, with obtuse serratures. Flowers large, although small for the genus, few, yellow and showy. The panicle is either 2 or 3-forked. Aug., Sept.

. scaberrimus. St. subsimple; lvs. thick, exceedingly rough and rigid; opposite or ternately verticillate. - Barrens, West.

22 H. microcephalus Torr. & Gr. St. glabrous; lvs. opposite, thin, oblong-lanceolate, acuminate at each end, petiolate, roughish above, downy beneath; hds. very small; scales with slender, spreading points; rays 5 to 7. - Thickets, W. Can., W. States, to La St. 3 to 6f high, fork-branched, or sometimes irregularly. Lvs. 4 to 5' long. Hds. 3 to 4" diam., rays spreading 1 1/2'. Jl. - Sept.

23 H. Schweinitzii Torr. & Gr. St. pubescent, with appressed, bristly hairs; lvs. rough above, densely tomentous-canescent beneath, otherwise as in No. 22. - N. Car. in the upland counties (Curtis). Similar to H. microcephalus, except in its rough and downy clothing.

24 H. laevigatus Torr. & Gr. Smooth throughout; st. slender, nearly simple; hds. small, but larger than in No. 22. Character otherwise as in that species.- Alleghanies of Va. and Car.

25 H. longifoliua Ph. Very smooth, often clustered; las. chiefly opposite, long-lance-linear, acute, entire, obscurely 3-veined, sessile, the radical somewhat serrate and petioled; scales ovate, acute, the outer with spreading tips; rays 8 to 10, short. - Western Ga. St 4 to 7f high, smooth and dark purple. Hd. not larger than in No. 22. - A rare species.

55. HELIANTHEL'LA, Torr. & Gr. (Lat. diminutive of Helianthus.) Involucre, flowers and pales as in Helianthus; achenia compressed, 4-angled, one or more of its angles slightly winged and produced into a persistent, awn-like or chaffy appendage. -Ц Lvs. scattered.

H. tenuifolia Torr. & Gr. Rough, slender; lvs. narrowly linear; scales lance-subulate, spreading, hairy; rays 10 to 12; pales 3-lobed; ach 2-toothed at the summit. Sand hills, Gadsden Co., Fla. (Chapman).