160 ORDER 70. COMPOSITE. 



1 1. MIKANIA, Willcl. CLIMBFNG BONESET. Fls. all tubular, 5 . la 

 volucre 4-leaved, 4-flowered. Receptacle and flowers as in Eupatorium. 

 U Climbing and twining. Leaves opposite. 



M. sca.nd.ens Willd. Smooth ; Ivs. cordate, repand-toothed, acuminate, the lobes di- 

 varicate ; hds. in pedunculate, axillary corymbs. Thickets, Ms. to Ga. Not common. 

 Clusters on the short, lateral branches, of white or pink-colored flowers. Aug. Sept. 



12. CONOCLINIUM, DC. Heads many-flowered. Receptacle coni- 

 cal. Character otherwise as in Eupatorium. U 5 Leaves opposite, peti> 

 late, serrate. Flowers sky-blue, in crowded corymbs. 



C. coelestinum DC. Much branched ; Ivs. deltoid-ovate, truncate or subcorclate, cre- 

 nate-serrate, petiolate ; scales linear, if. Copses, Pa., S. and W. 1 2f. Aug. Sept. 



13. TUSSILAGO, Tourn. COLT'S-FOOT. Head radiate, many -flowered. 

 Flowers of the ray ? , those of the disk $ . In vol. simple. Recep. naked. 

 Pappus capillary, it Lvs. radical. Fls. yellow, with very narrow rays. 

 T. Farfara L. Cold, clayey banks, N. and M. Scape 5', appearing with its single head 



of yellow flowers in March and April, before the large angular leaves. 



14. NARDOSMIA, Cass. Heads radiate, oo-flowered, somewhat ? $ . 

 Fls. of the ray ? , of the disk $ , but abortive in the sterile plant. Invol. 

 simple. Recep. flat, naked. Pappus capillary, it Leaves radical. Fls. 

 cyanic. The ray flowers of the sterile heads are in a single row ; of the 

 fertile in several rows, but very narrow. 



N. palmata Hook. Scape with a thryse or corymb ; Ivs. roundish-cordate, 5-7-lobed, 

 woolly beneath, coarsely dentate. Swamps, N. Eng. and W. Rare. May. 



15. ADENOCAULON, Hook. Fls. few, all tubular, of the margin 9 , 

 of the disk $ . Scales equal, in one series. Recep. naked. Cyp. clavate, 

 exserted, bearing stalked glands above. Pap. 0. H Nearly acaulescent, with 

 alternate leaves, and small, paniculate heads, also gland-bearing. 



A. bicolor Hook. Lvs. deltoid, cordate, angular-toothed, decurrent on the petioles, 

 white-downy beneath. Shores of Lake Superior, and W. (Common in Oregon.) 2f. 



16. AGATHJEA, Cass. Heads as in Erigeron, but the scales are 1- 

 veined, keeled or channelled, and the cypselse rough-haired. 5 S. Afr. 

 Leaves opposite. Disk flowers yellow, rays blue. (Cineraria, L.) 



A. AMELLOIDES. Lvs. ovate or oval, petiolate, entire, scabrous. Not hardy. A beau 

 tiful shrub, often cultivated in the greenhouse. 1 2f. Heads solitary. 



17. SERICOCARPUS, Nees. WHITE-TIPPED ASTER. Rayfls. 46, 

 $ : disk fls. 6 10, $ . Invol. oblong, imbricated. Scales appressed, white 



with green, spreading tips. Recep. alveolate. Cyp. obconic, very silky. 

 Pap. simple. U With alternate Ivs. and close corymbs. Rays white. 



1 S. solldagi liens Nees. Smooth; Ivs. linear-oblanceolate, obtuse, entire, eessJc; 



heads subsessile ; scales obtuse ; pap. white. Woods: com. 2f. Rays long. Jl. insr. 



2 S. conyzoides Nees. Some pubescent; Ivs. lance-oval, acute, serrate, the lower 



narrowed into a petiole ; rays short ; pappus rusty. Woods, M*. to Fla. l-2f. Jl. Aug. 



3 S. tortiiolius Nees. Grayish pubescent ; Ivs. short, oblong-obovate, sess., t'visted 



to a vertical position, both sides alike ; pappus white. Woods, Va. to Fla. 2f. Sept. 



