8(38 



COMPOS IT AE (COMPOSITE FAMILY) 



1024. L. villosa. 



§ 3. MULGEDIUM (Cass.) Gray. Achenes thirkish, ohlong, contracted into a 

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



* Pappus white. 



12. L. vill5sa 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 doul ly 

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

 contracted into a winged petiole, the lowest 

 occasionally sinuate or cleft at base, and the 

 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 tawmj. 



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

 (1-3.5 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- 



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



^ beaked. {L. leucophoea Gray.) — Low grounds, rather common. 



Fig. 1026. Var. ixtegrifolia (Gray) Britton. Leaves un- 

 divided, or the lower sinuate-pinnatifid. — Me. to 111. and N. C. 



1025. L. floridana. 



1026. L. spicata. 



101. LYGODESMIA D. Don. 



Heads and flowers (5-10) 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 rusli- 

 like stems or branches. (Name composed of \vyos, a pliant 

 ticig, and dea/xTj, a bundle., from the fascicled twiggy or rush- 

 like stems. ) 



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

 tufted, rigid, much branclied ; lower lenvrs 

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

 airl-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 m. or less 

 high, corymbose-paniculate ; leaves elongate, 

 the lower about 1 dm. long ; heads 8-0-flowered, scattered ; achene 

 fusiform., distinctly attenuate above., 1 cm. long. — Sandy s(»il, 

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



1027. L. juncea. 

 Ih-ads y.%. 

 Achene X ly.. 



1028. L. rostrata 

 Achene x 1 %. 



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 tlie 

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

 scapose herbs, with eloii<rate<? linear tufted basal leaves, and yellow flowers. 

 (Name from a?!, goat., and aipis, chicory.) 



