COMPOS [TAE (^COMPOSITE FAMILY) 873 



* * Rootstock short, stout, praemorse. 



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



►* Injtorescence a corymbiform panicle (^sometimes subcylindrtc in no. 11, uMth 



has leafy bracts). 



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



a. Leaves narrowly oblanceolate or spatulate, glaucous. 



5. H. praeXltcm Gochnat, var. DEcfpiENs Koch. Somewhat glaucous, bear- 

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

 narrowly ohlanceolate 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.) 



6. H. FLORENTiuuM All. (KrNG 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. {JS. praealtum Man. ed. 6, not Gochnat.) 

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



&. Leaves elliptic-oblong. 



7. H. venbsum L. (Rattlesnake-weed, Pook Kobin'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 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. Gre§nii 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 taiony-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. paniculHtum 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 smaZZ {Vi-W-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 

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

 veins beneath; panicle open, corymbiform; heads larger (id^^-flowered), on 

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

 N. H. to 0., and southw. June-Aug. 



11. H. scibrum Miohx. Stoutish, 3-12 dm. high, rough-hairy ; leaves elliptic 

 to sp'atulate-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 40~50-flowered, on thickish pedicels. — Dry woods and pastures, frequent. 

 July-Sept. 



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



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

 middie, 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; heads 15-20-flowered, on slightly glandular pedi- 

 pels.'— Sandy soil, Mass. to Ont., Kan., and southw. Au|.-Oct;, 



