372 COMPOSITE. Polymnia. 



Style in the sterile flowers 2-cleft ; the branches hairy. Achenia smooth, without pappus ; 

 of the disk abortive, terete ; of the ray thick, obovoid, somewhat compressed, wingless. 

 Pappus none. — Perennial viscid or glandular herbs, of a strong odor. Leaves opposite or 

 sometimes alternate, large and membranaceous, angularly lobed, with stipule-like appen- 

 dages at the base. Heads paniculate-corymbose. Flowers yellow or yellowish-white. 



§ 1. Rays tTiamspicuous, shorter than the involucre. 



1. Polymnia Canadensis, Linn. Small-Jlowered Leaf-cup. 



Viscidly pubescent ; leaves petioled, broadly rhomboidal, angularly lobed and somewhat 

 hastate, the lower ones deeply pinnatifid or lyrate ; involucre viscid and hairy ; the exterior 

 scales ovate-lanceolate, rather longer than the interior ; rays obovate-cuneate. — Linn. sp. 2. 

 ;;. 926, and aman. acad. 3. t. 1. /. 5 ; La7n. ill. t. 711 ; Michx. fl. 2. p. 147 ; Piirsh, fl. 2. 

 p. 579 ; Ell. sk. 2. p. 471 ; Beck, hot. p. 208 ; Darlingt. fl. Cest. p. 476 ; DC. prodr. 5. 

 p. 515 ; Torr. ^ Gr. fl. N. Am. 2. p. 273. 



Stem 2-5 feet high, erect, branching, roughly pubescent and a little viscid. Leaves very 

 thin, pale green, 4-8 inches long and often nearly as broad as long, sometimes (particularly 

 the upper ones) alternate, 3 - 5-lobed ; the lobes widely spreading, repandly toothed. Heads 

 about half an inch in diameter, loosely paniculate on slender peduncles. Inner scales of the 

 involucre 5-8, oblong. Rays white or very pale yellow, obtusely 3-lobed at the apex. Disk 

 pale yellow. Achenia smooth, dark brown, crowned with a protuberant ring. 



Shady places along streams, and in ravines in rich soils ; common in the western part of 

 the State. August. 



§ 2. Rays flat; much longer than Ihc involucre. 



2. Polymnia Uvedalia, Linn. Large-Jlowered Leaf-cup. 



Roughly pubescent ; leaves sinuate-lobed, broadly ovate or deltoid, triplinerved ; the lower 

 ones very large and somewhat palmately lobed, narrowed at the base into a winged petiole ; 

 involucre sliyhtly pubescent ; the exterior scales oblong-ovate, obtuse, many times larger than 

 the interior ones ; rays linear-oblong. — Linn. sp. (ed. 2.) 2. p. 1303 ; Lam. ill. t. 711./. 2; 

 Michx. fl. 2. p. 147 ; Pursh,fl. 2. p. 579; Ell. sk. 2. p. 471 ; Beck, hot. p. 208; Darlingt. 

 fl. Cest. p. 477 ; DC. prodr. 5. p. 515 ; Torr. ^ Gr. fl. N. Am. 2. p. 273. 



Stem 3-6 feet high, smoothish below, more or less pubescent and branching above. 

 Leaves thicker than in the preceding species, but membranaceous, roughish, minutely ciliate ; 

 the lower ones 6-12 inches long, sinuate and lobed ; the winged petiole also lobed or pinna- 

 tifid. Heads few, in a panicle, two inches or more in diameter. Rays 10 - 15, 3-toolhed at 

 the apex, bright yellow. Disk dull yellow. Inner scales of the involucre 10 - 14. Achenia 

 large, striate. 



Dry rich soils ; western part of the State. July - August. 



