'868 



COMPOSITAE (COMPOSITE FAMILY) 



3. MULGEDIUM (Cass.) Gray. Achenes thickish, oblong, contracted into a 

 short thick beak or neck; annual or biennial; flowers chiefly blue. 



* Pappus white. 



12. L. vil!6sa Jacq. Tall biennial, 1-2 m. high, with many 

 small heads in a loose panicle, on diverging peduncles ; leaves 

 ovate to oblong-lanceolate, pointed, sharply and sometimes doubly 

 serrate, or runcinate, sometimes hairy on the midrib beneath, 

 contracted into a winged petiole, the lowest 

 occasionally sinuate or cleft at base, and the 

 1024. L. villosa. cauline sagittate or hastate ; achenes beakless. 

 (L. acuminata Gray.) Borders of woods, N. Y. 

 to Neb., and south w. FIG. 1024. 



13. L. floridana (L.) Gaertn. Leaves all lyrate or runcinate, 

 or rarely entire, the upper often with a heart-shaped clasping 

 base; panicle larger; achenes distinctly beaked; otherwise as 

 no. 12. Rich soil, N. Y. and Pa. to Neb., and southw. FIG. 

 1025. 



* * Pappus tawny. 



14. L. spicata (Lam.) Hitchc. Nearly smooth biennial, tall 

 (1-3.6 m. high), very leafy ; leaves irregularly pinnatifid, some- 

 times runcinate, coarsely toothed, the upper cauline sessile and 

 auriculate, sometimes clasping ; heads in a large and dense com- 

 pound panicle ; flowers bluish to cream-color ; achene short- 

 beaked. (L. leucophoea Gray. ) Low grounds, rather common. 

 FIG. 1026. Var. INTEGRIB^LIA (Gray) Britten. Leaves un- 

 L. spicata. diyided or the lower sinuate-pinnatifid. Me. to 111. and N. C. 



1025. L. floridana. 



101. LYGODESMIA D. Don. 



Heads and flowers (6-10) nearly as in Prenanthes, the cylindrical involucre 

 more elongated, and the achenes long and slender, tapering at the summit ; 

 pappus whitish. Smooth, often glaucous, with terminal or 

 scattered heads of rose-purple flowers on the leafless or rush- 

 like stems or branches. (Name composed of Xifyos, aplfmif 

 twig, and 5<?<r/;, a bundle, from the fascicled twiggy or rush- 

 like stems.) 



1. L. juncea (Pursh) D. Don. Perennial, 2-4 dm. high, 

 tufted, rigid, much branched ; lower leaves 

 lance-linear, 2.5-5 cm. long, rigid, the upper 

 awl-shaped and minute ; heads 5-flowered, 

 terminal ; achene filiform, only slightly 

 attenuate above, 4-5 mm. long. Plains, St. 

 Croix River, Wise, to the Saskatchewan, 

 Mo., and westw. June-Sept. FIG. 1027. 



2. L. rostrata Gray. Annual, 1 in. or less 

 high, corymbose-paniculate ; leaves elongate, 

 the lower about 1 dm. long ; heads 8-9-flowered, scattered ; 

 f^&fm distinctly attenuate above, 1 cm. long. Sandy soil, 

 Kan. to the Saskatchewan, and westw. Aug.-Sept. FIG. 1028. 



1027. L. juncea. 

 Heads x a/ 3 . 

 Achene x \%. 



1028. "L. rostrata. 

 Achene x \%. 



102. AG6SERIS Raf. 



Head large, solitary, many-flowered. Bracts of the bell-shaped involucre 

 ovate or lanceolate, pointed, loosely imbricated in 2 or 3 rows. Achenes smooth, 

 10-ribbed, with or without a distinct beak ; pappus usually longer than the 

 achene, white, of copious and unequal rigid capillary bristles. Perennial 

 scapose herbs, with elongated linear tufted basal leaves, and yellow flowers. 

 (Name from af, </<><it, and crtpis, chicory.) 



