FAM. 173. 143 



of soft capillary bristles; flowers white or pinkish. 



Mesadenia tCacalia\ Indian Plantain 



M. (CO ovata. Stein terete; leaves ovate to oval. 3-5 palmately-veined. the 

 lowest long- pet ioled; heads often numerous. Swampy woods. Summer. 



M. C 1 lanceolata. Stem terete; leaves linear to lanceolate, with margined 

 petioles; heads relatively few. Wet pine-land. Spring to Fall. 



6. Bracts of the involucre in 1-2 rows, imbricated; pappus scaly. (See 17b.) 



6. Bracts of the involucre in 2-several rows, -------7 



7. Pappus double, the outer series of scales or stout bristles, the inner of 



rough, hair-like bristles; — herbs or shrubby plants with alter- 

 nate leaves and purple heads in panicled or corymbed cymes; 

 bracts in several rows. Summer. - Vernonia, Iron-weed 



V. angustifolia. Leaves nearly smooth, narrowly linear; bracts of involucre 

 lanceolate to oblong, with somewhat spreading tips; pappus purplish. Sandy 

 soil. 

 7. Pappus single or double, bristly from a scale-like base; — erect herbs, 

 3-9 dm. tall, corvmtosely branched or simply forked above; the 

 small 3-5 flowered heads collected into glomerules which are 

 subtended by 2 or 3 leaf-like bracts; the purple, blue or whitish 

 corollas deeply cleft on the inner side; stigmas pubescent. Sandy 

 soil. Summer and Fall. - Elephantopus, Elephant's Foot 



E. Carolinianus. Stem hairy; leaves hairy, chiefly cauline, oblong to oval, cre- 



nate and repand. 

 E. tomentosus. Stem hirsute; leaves hirsute-tomentose, chiefly basal, oblong 

 to oblanceolate, crenate-serrate. 

 7. Pappus in 1-2 rarely more, series of barbed or plumose bristles, - - - 8 

 7. Pappus in 1 series of hair-like bristles or scales, 10 



7. Pappus wanting; — erect herbs, corymbosely branched, with alternate. 



entire, glabrous leaves; heads peduncled, few-flowered; invol- 

 ucres and flowers of each head punctate with resinous glands; 

 bracts linear, in two series; receptacle naked. - - Hartwrightia 



H. Floridana. Lower leaves oblong, narrowed into margined petioles; the up- 

 per linear, smaller and remote; corollas white. Low ground. Summer 

 and Fall. 



8. Perennial caulescent herbs, ---------9 



8. Low shrubs; — leaves numerous, alternate, leathery; heads in dense 



corymbose cymes; bracts herbaceous in about 5 rows of 3-4 each; 

 anthers appendaged at the top; pappus in 2-more series, copi- 

 ous, _________ Garberia (Liatris) 



G. L. fruticosa. Leaves spatulate or obovate, pale; heads 5-flowered, crowded. 

 Sandy soil. Spring to Fall. 



9. Bracts of involucre nearly equal, slightly imbricated; heads in th> 



soid or corymbose panicles; — leaves alternate, the basal ones 

 with broad petioles, the cauline ones sessile or clasping; flowers 

 purplish or white. Late Summer. - Trilisa (Liatris) 



T. >L.) paniculata. Stem viscid-pubescent; leaves smooth, elliptic to lanceo- 

 late; heads mostly 5-flowered. in thyrsoid panicles. Damp pine-barrens. 

 T. L.i odoratissima, Vanilla-plant. Decr-iongue. Stem smooth; lowest leaves 

 spatulate or oblong, the upper oval or oblong, small, sessile; heads mostly 

 7-8 flowered, in corymbose panicles. Flatwoods. 

 9. Bracts of involucre in several rows, the inner successively longer; 



