o. 



COMPOSITAE (COMPOSITE FAMILY) 873 



* * Rootstock short, stout, praemorse. 

 •«- Heads small, 1-2.3 cm. in diauuter. 



Inflorescence a corymhiform panicle (sometimes suhrylindric in no. 11, xchich 

 has leafy bracts). 

 = Leaves (at least those of the primary axis) chiefly basal. 

 a. Leaves narrowly oblanceolate or spatulate, glaucous. 

 H. praeAltum Gochnat, var. DEcfpiKxs Koch. Suine\vh;it j^laucuH bear- 

 ing numerous slender elongated leafy branches from the base; basal leaves 

 narrowly oblanceolate to linear-oblong, soniewluu hisijid on both surfaces and 

 finely stellate-pubescent beneath; scape tall, setose; corymb im-guhir ; flowers 

 yellow. — Established in a dry pasture, Andover, Mass. (^1. S. I'ease), June. 

 (Adv. from Eu.) 



0. H. FLOREXTiNDM All. (KixG Devil.) WUhout slender leafy branches 

 from the base, smootbish ; basal leaves oblance.jlate to spatulate, thickish 

 sparingly setose or more often glabrous; scape 8-8 dm. high, smooth or spar- 

 ingly setose ; corymb many-headed. (IL praealtum Man. ed. (J, not Gochnat ) 

 — Open places, fields, etc., e. Que. to n. N. Y. (Nat. from Eu.) 



b. Leaves elliptic-oblong. 



7. H. venbsum L. (Kattlesxake-weed, Poou Rqbis's Plantain.) Scape 

 2-7 dm. high, naked, or with 1 rarely 2 leaves (var. SLncAi-LtscExs T. & G.), 

 smooth, slender, forking above into a loose corymb; leaves nearly entire, 

 scarcely petioled, thin, glabrous and often purple-veined or mottled above] 

 glaucous beneath ; pedicels very slender, sparingly glandular-pubescent toward 

 the tip. — Dry woods and open sandy places, s. Me. to Ga., and westw. Late 

 May-Sept. 



8. H. Greenii Porter & Britton. Scape 2-7 dm. high, usually spreading- 

 villous especially below, naked or more often with 1-2 leaves near tlie bjise ; 

 leaves spatulate to obovate, green, conspicuously sordid- or taicny-villous on 

 both surfaces; inflorescence copiously glandular-hispid. (H. marianum, var. 

 spathulatum Gray.) — Dry woods, Pa. and O. to Mo., and southw. 



= = Stem leafy to the inflorescence. 



9. H. paniculatum L. Stem slender, 3-12 dm. high, glabrous except at the 

 villous base; leaves thin, lanceolate, remotely toothed, acute, glabrous, glaucous 

 beneath; panicle lax; heads comparatively .sm^^/Z (rJ-2(>-/?oHv?V(/), on filiform 

 smoothish pedicels. — Open woods, N. S. and centr. Me. to Mich., s. to Ga. and 

 Ala. Late July-Sept. 



10. H. marianum Willd. Stouter ; stem setose at least below ; leaves obo- 

 vate-oblong, obtuse or rounded at tip, subentire; the biusal large, on hairy 

 winged petioles, green or rarely purple-veined, glabrous above, hairy on the 

 veins beneath; panicle open, corymbiform ; heads larger ('2()-4()-flotcered), on 

 whitish-tomentose and glandular-hispid pedicels. — Open woods and clearings, 

 N. H. to O., ?nd southw. June-Aug. 



11. H. scabrum Michx. Stoutish, 3-12 dm. high, rough-hairy ; /fa jv.s elliptic 

 to spatulate-obovate, obtuse, subentire. thickish, hairy on both surfaces, deep 

 green above, paler beneath ; panicle stiff, corymbiform, its axis and branches 

 densely white-tomentose and commonly covered with numerous dark glands ; 

 heads 40-'j0-flowered, on thickish pedicels. — Dry woods and paijture.s, fretjuent. 

 July-Sept. 



++ ++ Inflorescence more slender and elongated, subcylindric, not hafy-bracted. 



12. H. Gronbvii L. Stem wand-like, 3-12 dm. high, leafy chiefly IhIow the 

 middle, villous at base ; basal leaves oblong to obovate, 6-15 cm. long, rounded 

 or obtuse at the tip, setose chiefly above, minutely stellate-pulM'scent In-neaih ; 

 the stem-leaves similar, decreasing rapidly in size ; panicle thyrsoid. 1-1 dm. 

 long, without leafy bracts; heads 15-20-flowered, on slightly glandular pedi- 

 cels. — Sandy soil, Mass. to Out., Kan., and southw. Aug. -Oct. 



