ORDER 70. COMPOSITE. 171 



31. CONYZA, L. GNATBANE. Fls. all tubular, those of the margin $ , 

 of the centre $ or 5 . Scales in several rows. Recep. flat or convex. Cyp. 

 compressed. Pap. I row of (red) capil. bristles. Herbs chiefly trop. Fls. yel. 

 C. ambigna DC. Cinereous-pubescent; lower Ivs. sinuate-lobed, acute, middle re- 



pand-dentate, upper linear, entire ; hds. panicled. Ga. S. Car. Ap.-Jl. (C. sinuataEll.) 



32. INULA, L. ELECAMPANE. Hds. many-flowered. Invol. imbricate. 

 Ray-fls. numerous, ? ; disk-fls. 5 . Recep. naked. Pap. simple, scabrous. 

 Anthers with 2 bristles at base, if Coarse European herbs, with alternate 

 leaves and very large yellow heads. 



I. Heleiiium L. Lvs. amplexicaul, ovate, rugous, downy beneath; hds. solitary, ter- 

 minal ; sc. ovate. Pastures and roadsides, N. Eng. to 111. 4-6f. Root Iva. l-3f. Jl. Aug. 



33. FLUCHEA, DC. MARSH FLEABANE. Hds. oo-nowered ; fls. of 

 the margin ? , of the centre 5 , but sterile. Invol. imbricated. Recep. flat, 

 naked. Sty. undivided. Pap. capillary, simple. Strong-scented herbs, with 

 alternate leaves and corymbs of purple fls., and copious, reddish pappus. 



1 P. bifrons DC. Pubescent, leafy; Ivs. oval-oblong, acute, finely serrate, cordate- 



amplexi caul, veiny ; heads in compound, corymbous clusters. K Damp, S. 2f. 



2 P. campb.ora.ta DC. Lvs. ovate-lanceolate, somewhat pubescent, acute, sessile or 



short-petioled, serrate ; fls. in crowded corymbs ; sc. viscid-downy, pointed. (T) Salt 

 marshes, Mass, to Fla. 1 3f. Stout, some fleshy, with upright branches. Aug. Sept. 



3 P. purpurascens DC. Glandular-tomentous ; Ivs. ovate-lanceolate, serrate, on 



slender petioles; hds. on slender ped. ; sc. downy, acute. (I) Swamps. l-2f. Fla. Sept. 



4 P. foetida DC. Nearly glabrous, very leafy ; Ivs. broadly lanceolate, acute or acu- 



minate at each end, petiolate, obtusely subserrate ; heads numerous, in paniculate 

 corymbs ; scales smoothi^h, acute, y. Open hills, W. & S. 1 2f. Aug. Oct. 



34. BACCHARIS, L. GROUNDSEL TREE. Hds. discoid, $ ? . Invol. 

 imbricate, cylindric, or ovate, with subcoriaceotis, ovate scales. $ Sta. 

 exserted. Recep. naked. Pap. capillary. ^ With alternate leaves and 

 white flowers in Autumn. 



1 B. lialimiiolia L. Whitish-scurfy ; Ivs. obovate, incisely- or repand-dentate above, 



the highest lanceolate ; panicle compound, leafy ; fascicles pedunculate, terminal, in 

 a dense panicle. Sea-coast, Conn, to Fla. 6 12f. A handsome shrub. 



2 B. glomerullflora Pers. Minutely scurfy ; Ivs. all obovate, very obtuse, repand- 



few-toothed ; heads in sessile, axillary glomerulep. Coast, Va. to La. 3 6f. 



3 B. aiiji usti iolia MX. Diffusely branched ; Ivs. linear, sessile, entire ; hds. small, 



15-20-flowcred, cylindrical, axillary, loosely paniculate. Marshes, S. C lOf. 



35. PTEROCAULON, Ell. BLACK-ROOT. Hds. many-flowered, the 

 fertile flowers $ , in several rows, the sterile flowers central, mostly $ . Sc. 

 imbricated, caducous with the fruit, 9 corollas 3-toothed, $ 5-cleft. Cyp. 

 angular, hispid. Pap. of equal capillary bristles longer than the involucre. 

 if Rhizome tuberous. Leaves alternate, decurrent, and the stem winged. 

 Heads sessile, crowded in a thick woolly spike. 



1. pyeliiiostacliyum Ell. Simple; Ivs. lanceolate, smooth above, cream-white- 

 tomentous beneath, as well as one side of the wings of the stem. Sandy soils, S. 2-3f. 

 Spike 23'. May Aug. A curious plant. 



36. BORRICHIA, Adans. SEA OX-EYE. Ray-fls. ligulate, $, ftrtile 



