OKDER 70. COMPOSITE. 193 



N. crepidf ileus DC. Smoothish, tall, stout, corymb.-paniculate ; Ivs. broadly tri- 



aug.-ovate to lanceolate, toothed, petiolate ; hds. nodding, of 12 sc. and 25 35 ochro- 

 leucousfls. Fields, thickets, W. States. 5 8f. Larger than any of the foregoing. Sept. 



109. LYGODESMIA, Don. Invol. fls., &c., as in Nabalus. Pappus 

 whitish. Corollas rose-colored. 14 With linear-subulate leaves and erect 

 heads on long, naked peduncles. 



1 L. aphylla DC. St. scape-like, erect, slender, forked above ; Ivs. nearly all radical, 



short, linear-filiform ; heads 5-flowered. Pine woods, Ga. Fla. 2f. May. 



2 lit jiincea N. St. much branched ; Ivs. lance-linear ; fls. 5. Min. (Matthews), and W. 



110. TROXIMON, Nutt. Hds. many-flowered. Invol. campanulate, 

 scales loosely imbricate, in 2 3 rows. Cyp. oblong-linear, compressed, 

 glabrous, not rostrate. Pap. setaceous, copious, white. U Lvs. all radical. 

 Scape bearing a single, large, showy head, with yellow flowers. 



T. cuspidatnm Ph. Rt. fusiform ; Ivs. linear-lanceolate, woolly at the edge ; scales 

 lanceolate, cuspidate-pointed. Prairies, 111. Wis., and West. April June. 



111. PYRRHOPAFPUS, DC. FALSE DANDELION. Invol. double, 

 the outer row numerous, loose and spreading. Receptacle naked. Cyp. 5- 

 grooved, at length long-beaked, bearing a copious, soft, capillary, reddish 

 pap. (T) if Hds. solitary on long ped., large, with numerous deep yel. fls. 

 P. Carollniamis DC. St. simple or branched, scape-like : Ivs. mostly radical, lance- 

 olate, acute, sinuate-toothed, lobed, or pinnatifid. Fields, Md. to Fla. May July. 



112. TARAXACUM, Desf. DANDELION. Invol. double, the outer of 

 small scales, much shorter than the inner appressed row. Recep. naked. 

 Cyp. produced into a long beak crowned with the copious, white, capillary 

 pappus. Acaulescent herbs, with runcinate leaves. Figs. 68, 346, 492. 



T. Deiis-leonis Less. Outer scales of the involucre reflexed ; Ivs. runcinate. smooth, 

 dentate ; scape short in fl ., long in fr. a globe of pappus, u Fields : common. Eur. 



113. LACTUOA, Tourn. LETTUCE. Invol. few-flowered, scales im- 

 bricated in 2 or more unequal rows. Cyp. obcompressed (flattened same 

 way as the scales), glabrous, abruptly narrowed to a long, filiform beak. 

 Pappus copious, soft, capillary, white. Herbs with leafy stems and panic- 

 ulate heads of variable colors. Fig. 77. 



1 JL. Canadeiisis L. /3. elong-bta. T?-umpet Milkweed. St. tall, hollow ; Ivs. pale 



beneath, clasping, rune. -pinnatifid, upper lance., entire ; heads racemous-panicnlate, 

 with few scales and 12 + lls. @Rich soils, thickets. 3 6f. Yel. to purplish. JL, Aug. 



/3. nang-uinea. Stem, If. veins, and fls. purple ; Ivs. some hairy, glaucous beneath. 



y. g-ramtnt folia. Lvs. long, linear, the lower few-lobecl, upper entire. South. 



S. Integ-rl folia Lvp. lanceolate, all entire, lower some sagittate at base. 



2 L. sati va. Garden Lettuce. Stem corymbous ; Ivs. roundish, the upper cordate ; fls. 



white, (i) Said to be in some places, when its Ivs. become dentate-lobed and prickly. 



114. MULGEDIUM, Cass. WILD LETTUCE. Involucre somewhat 

 double, outer scales short and imbricated, llecep. naked, faveolate. Pap. 

 capillary, crowning the short-beaked, compressed cypsela. Leaves mostly 

 spinulous. lids, paniculate, small, oc-fhvd. Jl. Sept. Figs. 76, 448-50. 



