474 COMPOSITAE. [Vol. III. 



2. Mesadenia atriplicifdlia (I,.) Raf. Pale Indian Plantain. (Fig. 4030.) 



Cacalia atriplicifolia L,. Sp. PI. 835. 1753. 



Senecio atriplicifolius Hook. Fl. Bor. Am. 

 1:332. 1833. 



Mesadenia atriplicifolia Raf. New Fl. 4: 

 79. 1836. 



Stem terete, glabrous and glaucous, 

 3-6 high. Leaves thin, angulate- 

 lobed, glaucous beneath, the lower and 

 basal ones slender-petioled, sometimes 

 6 / wide, the upper reniform, fan-shaped, 

 or triangular with a nearly truncate 

 base, the uppermost commonly small, 

 lanceolate or oblong and entire; heads 

 very numerous, about \ l / 2 " broad, in 

 large loose compound corymbs; invo- 

 lucre 3 // -4 // high, its bracts about 5, 

 linear-oblong, scarious-margined, with 

 or without 1-3 minute outer ones. 



In woods, western Ontario to Minnesota, 

 south to Florida, Missouri and Kansas. 

 Rare or absent near the coast. Called also 

 Wild Caraway. July-Sept. 



Mesadenia tuberosa (Nutt.) Britton. 



(Fig. 4031.) 



Tuberous Indian Plantain. 



Cacalia tuberosa Nutt. Gen. 2: 138. 1S18. 

 Mesadenia plantaginea Raf. New Fl. 4: 79. 

 Senecio Nultallii Seh. Bip. Flora, 27: 499. 



1836. 



1845. 



Glabrous and green throughout; stem angled, 

 stout, 2-6 high. Leaves thick, strongly 5-9- 

 nerved, the lower and basal ones oval, ovate, 

 or ovate-lanceolate, obtuse or acutish, usually 

 quite entire, but sometimes repand, long-peti- 

 oled, narrowed at the base, or rarely subcordate, 

 4 / -8 / long, i / ~3 / wide; upper leaves ovate to 

 oblong or cuneate-obovate, sessile or short-pet- 

 ioled, much smaller, sometimes toothed toward 

 the apex; heads very numerous in a compound 

 corymb, about 2" broad, mostly 5-flowered; 

 involucre 3 // -4 // high, its bracts linear-oblong, 

 obtuse or obtusish, scarious-margined. 



On wet prairies and in marshes, Ohio and west- 

 ern Ontario to Minnesota, south to Alabama, Louisi- 

 ana and Arkansas. June-Aug. 



94. SYNOSMA Raf. 



Loud. Gard. Mag. 8: 



247. 1832. 



A perennial leafy herb, glabrous or very nearly so, with triangular or hastate, alternate 

 leaves, the lower petioled, the upper sessile, and several or numerous, corymbose or corym- 

 bose-paniculate, discoid heads of white or pinkish flowers. Involucre nearly cylindric, its 

 principal bracts 12-15, linear, acute, usually with some subulate outer ones. Receptacle flat, 

 naked. Flowers perfect; corolla 5-lobed. Style-branches not appendaged. Pappus of very 

 numerous white soft capillary bristles. [Greek, perhaps signifying a fragrant composite.] 



A monotypic genus of eastern North America. 



