874 coMPOSiTAE (composite family J 



13. H. longipilum Torr. Similar, copiously covered with extremely long 

 (1-2 cm.') soft white to tawny hairs; basal leaves oblanceolate, acuLish, l.;^-8 

 dm. long; upper leaves similar, much smaller; heads 20-80-flowered ; pedicels 

 copiously glandular. — Open woods and prairies, Mich, to Minn., southw. and 

 .south westw. Aug., Sept. 



■t- ■«- Heads large, 2.5-4.5 cm. in diameter. 



++ Basal leaves elliptic to ovate, slender-petioled, the cauline rather few. 



14. H. mcr6rum L. (Goldex Lungwort.) Scape naked or with a single 

 leaf, 2-7 dm. high, smoothish ; leaves green, not mottled; the bavsal toothed or 

 incised especially -near the rounded or suhcordate base; heads few; involucre 

 densely glandular. — Established in open woods, Northampton, Mass. {3Irs. 

 Terry) and near Brooklyn, N. Y. May, June. (Adv. from Eu.) 



15. H. vulgXtum Fries. Stem hearing 2-several leaves, 1.5-8 dm. tall, 

 rather slender and flexuous ; basal leaves lanceolate to ovate, acute, tapering to 

 the petiole, remotely dentate, usually puj'plish-mottled above ; heads 1-several, 

 about 4 cm. in diameter. — Fields, open woods, and ledgy shores, Nfd. to w. 

 Que. and locally s. to s. N. Y. June-Sept. (Nat. from Eu.) 



++ ++ Basal leaves lance-oblong, scarcely petioled, the cauline numerous. 



16. H. canad^nse Michx. Stoutish, 2-12 dm. high; leaves ovate to lance- 

 oblong, spreading, coarsely toothed especially below the middle, acute, firm 

 in texture, at least the upper rounded or suhcordate at the base ; heads several, 

 in a corymb. — Borders of woods, shores, etc., Nfd. to B. C, s. to N, J., Pa., 

 the Great L. region, and Ore. July-Sept. 



17. H. umbellatum L. Similar; leaves lance-linear to lanceolate, attenuate 

 to a narrow sessile base, entire or nearly so; heads few, subumbellate. — 

 L. Superior, uorthw. and westw. (Eurasia.) 



