GNAPHALIUM COMPOSITE 331 



glomerules of rather broad heads : leaves very numerous, lanceolate or the 

 upper linear, white- woolly beneath or rarely glabrate: involucre broadly 

 campanulate, white, usually becoming rusty tinged, the thin scarious 

 bracts ovate and oblong, acutish, only the innermost linear-lanceolate and 

 acute. Rather open and dry grounds , Brit. Columbia to Washington. 



* * Involucre less imbricated, more woolly, the scarious tips of the 

 nearly equal bracts not very conspicuous, dull-colored : heads glomerate 

 and leafy-bracteate, only a line or so high : low branching annuals. 



G. palustre Nutt. 1. c. 403. Loosely floccose with long wool : stems erect 

 or diffusely branching from the base, 2-8 inches high : leaves spatulate to 

 lanceolate or linear. 6-12 lines long: heads very numerous, in small glom- 

 erules terminating the stem or branches '.involucre campanulate, its bracts 

 linear with glabrous white acute tips. Edges of ponds and damp places, 

 Brit. Columbia to California and the Rocky mountains. 



G. ULIGINOSUM L. Fl. Dan. 859. Appressed-woolly : stems 2-6 inches 

 high, soon diffusely branched, leafy: leaves spatulate-linear or the lower 

 spatu'ate-oblanceolate, 6-12 lines long: heads numerous, in racemosely 

 disposed glomerules: involucre narrow, 1-2 lines long, its linear-lanceolate 

 or subulate bracts brown or soon becoming so. On moist banks and flats, 

 Brit. Columbia to California and the eastern States: introduced from Eu. 



2 GAMOCH^TA Webb Chlor. And. i, 151, as genus Bristles 

 of the pappus united at base into a ring and deciduous together 

 from the achene. Heads spicately or capitately glomerate, the 

 lower glomerules leafy-bracteate. Involucre brownish, purple or 

 sorded. 



G. purpureum L. Pp. jv 854. Canescent with close and dense silvery 

 wool: stems simple, stoutish, 5-12 inches high, from a perennial root: 

 leaves spatulate, 1-2 inches long, often becoming green and glabrate above ; 

 heads numerous, in an oblong or cylindraceous or spiciform inflorescence : 

 involucre campanulate, about 2 lines long, its ovate or lanceolate bracts 

 brownish or purplish. Common in fields and open places, throughout 

 North America. 



Sublribe in, Euinula DC- Prodr v, 463. Heads helerogam- 

 ous,with llie pistillate flowers all ligulale and radiate, and 

 the disk-flowers all hermaphrodite and fertile. (Receptacle 

 naked. Style-branehes of the hermaphrodite flowers linear, 

 rounded at the apex, rtchenes mostly coriaceous. 



32 INULA L. Gen. n. 956. 



Tomentose or woolly perennial herbs with alternate leaves and 

 large heads of yellow flowers. Heads radiate, many-flowered. 

 Involucre imbricated, the outer bracts herbaceous. Receptacle 

 flat or nearly so, not chaffy. Achenes more or less 4-costate. 

 Pappus of scabrous capillary bristles. 



I. HELENIUM L. Sp. 881. (ELECAMPANE.) Stems tufted from |large thick 

 roots, simple, or rarely somewhat branched, 2-6 feet high, densely pubes- 

 cent above : leaves large, broadly oblong, rough above, densely pubescent 

 beneath, denticulate, the radical ones acute at each end long-petioled, 10-20 

 inches long by 4-8 broad ; cauline sessile or cordate-clasping at the base, 

 acute at the apex, smaller: heads solitary or few, terminal, stout-peduncl- 

 ed, 2-4 inches broad : involucre hemispherical, nearly 1 inch high, its 

 stout bracts ovate, foliaceous, pubescent : rays numerous, linear : achenes 



