45S 



COMPOSITAE. 



VOL. 111. 



48. POLYMNIA L. Sp. PI. 926. 1753. 



Perennial herbs (some tropical species woody), with opposite membranous lobed or 

 angled leaves, or the lower alternate, and mostly large corymbose-paniculate heads of both 

 tubular and radiate yellow or whitish flowers, or rays sometimes wanting. Involucre hemi- 

 spheric or broader, of about 5 large outer bracts, and more numerous smaller inner ones. 

 Receptacle chaffy. Ray-flowers pistillate, fertile, subtended by the inner involucral bracts, 

 the ligules elongated, minute, or none. Disk-flowers subtended by the chaffy scales of the 

 receptacle, perfect, sterile, their corollas tubular, 5-toothed. Anthers 2-toothed at the base. 

 Pappus none. Achenes thick, short, turgid, glabrous. [From the Muse Polhymnia.] 



About 10 species, natives of America. Only the following are known in North America. Type 

 species: Polymnia canadensis L. 



Rays commonly 6" long or more, yellow; achenes strongly striate. i. P. Uvedalia. 



Rays commonly minute or up to 6" long, whitish, or none ; achenes 3-ribbed. 2. P. canadensis. 



i. Polymnia Uvedalia L. 

 flowered Leaf-cup. 



Yellow or Large- 

 Fig. 4417. 



Polymnia Uvedalia L. Sp. PI. Ed. 2, 1303. 1763. 



Rough-pubescent, stout, branched, 3-io high. 

 Leaves broadly ovate or deltoid, 3-nerved, abruptly 

 contracted above the base, minutely ciliate, more 

 or less pubescent on both sides, angulate-lobed, the 

 lower often i long and broad, petioled, the upper 

 sessile, somewhat clasping ; heads few in terminal 

 clusters, peduncled, ii'-3' broad; rays 10-15, com- 

 monly 6"-l2" long, linear-oblong, bright yellow, 

 3-toothed or entire; exterior bracts of the cup-like 

 involucre ovate-oblong, obtuse, ciliate, 4"-io" long ; 

 achenes slightly oblique and laterally compressed, 

 strongly striate, nearly 3" long. 



In rich woods, New York to Indiana, Florida, Mis- 

 souri, Oklahoma and Texas. Bermuda. Yellow bears- 

 foot. July-Aug. 



2. Polymnia canadensis L. Small-flowered 

 Leaf-cup. Fig. 4418. 



Polymnia canadensis L. Sp. PI. 926. 1753. 

 Polymnia canadensis radiata A. Gray, Syn. Fl. N. A. 



I : Part 2, 238. 1884. 

 P. radiata Small, Fl. S.E. U. S. 1239. 1903. 



Rather slender, viscid-pubescent, at least above, 

 simple or branched, 2-5 high. Leaves deltoid- 

 ovate to hastate, usually very thin, all petioled, 

 deeply angulate-lobed and the lobes dentate, or 

 the lower lyrate-pinnatifid, 4'-io' long, the upper- 

 most sometimes ovate and entire or merely den- 

 ticulate ; heads few in terminal clusters, short- 

 peduncled or sessile, 4"-6" broad ; outer bracts of 

 the involucre ovate to lanceolate, obtuse or acut- 

 ish, 2"-3" long ; rays small, minute or none, or 

 sometimes up to 6" long and 3-lobed, whitish or 

 yellowish; achenes 3-angled, obovoid, obcom- 

 pressed, 3-ribbed, not striate. 



In damp, rich shaded places, Vermont and Ontario 

 to Minnesota, Pennsylvania, North Carolina, Tennessee and Arkansas. June-Sept. 



49. MELAMPODIUM L. Sp. PI. 921. 1753- 



Herbs, some species woody, with opposite entire or dentate leaves, and terminal peduncled 

 heads of both tubular and radiate, white or yellow flowers in our species. Involucre hemi- 

 spheric, its bracts in 2 series, the 4 or 5 outer ones broad, often connate at the base, the inner 

 hooded, embracing or permanently surrounding the pistillate fertile ray-flowers. Receptacle 

 convex or conic, chaffy. Ray-flowers in I series, the rays spreading, 2-3-lobed or entire. 

 Disk-flowers perfect, sterile, their corollas with a narrowly campanulate 5-toothed limb, the 

 anthers entire at the base, the style undivided. Achenes obovoid, more or less incurved. 

 Pappus none. [Greek, black-foot, of doubtful significance, but the stem bases of the typical 

 species are dark-colored.] 



