COMPOSLTAE (COMPOSITE FAMILY) 873 



* * Rootstock shorty stout, praemorse. 



4- Heads small, 1-2.3 cm. in diameter. 



w- Inflorescence a corymbiform panicle (sometimes subcylindric in no. 11, which 



has leafy bi'acts). 



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



a. Leaves narrowly oblanceolate or spatulate, glaucous. 



5. H. praeIltum Gochnat, var. decipiens Koch. Somewhat glaucous, bear- 

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

 narrowly oblanceolate to linear-oblong, somewhat hispid on both surfaces and 

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

 yellow. — Established in a dry pasture, Andover, Mass. (A. S. Pease). June. 

 (Adv. from Eu.) 



G. H. FLORENTiNUJi All. (KiNG Devil.) Without slender leafy branches 

 from the base, smoothish ; basal leaves oblanceolate to spatulate, thickish, 

 sparingly setose or more often glabrous; scape 3-8 dm. high, smooth or spar- 

 ingly setose ; corymb many-headed. {H. praealtum Man. ed. 6, not Gochnat.) 

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



5. Leaves elliptic-oblong. 



7. H. venbsum L. (Rattlesxake-weed, Poor Robin's Plantain.) Scape 

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

 smooth, slender, forking above into a loose corymb ; leaves nearh^ 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 the base ; 

 leaves spatulate to obovate, green, conspicuously sordid- or tavniy-viUous 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«ZZ (\2-20-flowered), 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 basal large, on hairy 

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

 veins beneath; panicle open, corymbiform; heads larger (20-AO-floicered), on 

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

 N. H. to O., and southw. June-Aug. 



IL H. scabrum Michx. Stoutish, 3-12 dm. high, rough-hairy ; /eaves elliptic 

 to spatulate-obovate, obtuse, subentire, thickish, haii'y on both surfaces, deep 

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

 densely white-tomentose and commonly covered ^^ith numerous dark glands ; 

 heads 40-oO-flowered, on thickish pedicels. — Dry woods and pastures, frequent. 

 July-Sept. 



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



12. H. Gron5vii L. Stem wand-like, 3-12 dm. high, leafy chiefly below the 

 middle, villous at base ; basal leaves oblong to obovate, 5-15 cm. long, rounded 

 or obtuse at the tip, setose chiefly above, minutely stellate-pubescent beneath ; 

 the stem-leaves similar, decreasing rapidly in size ; panicle thyrsoid, 1-4 dm. 

 long, without leafy bracts; lieads 15-20-tlowered, on slightly glandidar pedi- 

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



