160 ORDEII 70. COMPOSITE. 



1 1. MIKANIA, Willd. CLIMBING BONESET. Fls. all tubular, . In 

 volucrc 4-leaved, 4-flowered. Receptacle and flowers as in Eupatoriuin. 

 if Climbing and twining. Leaves opposite. 



M. scandens 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 Eupatoriuin. if 5 Leaves opposite, peti> 

 late, sen-ate. Flowers sky-blue, in crowded corymbs. 



C. ceelestinum DC. Much branched ; Ivs. deltoid-ovate, truncate or subcordate, cre- 

 nate-serrate, petiolate ; scales linear, y 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 $ . Invol. simple. Recep. naked. 

 Pappus capillary, if 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, if 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. palmutu 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 ? , 

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

 exserted, bearing stalked glands above. Pap. 0. it Nearly acaulescent, witli 

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



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

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



16. AGATH2EA, Cass. Heads as in Erigeron, but the scales are 1- 

 veined, keeled or channelled, and the cypselaB rough-haired. > S. Afr. 

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



A. AMELLOIDKS. Lvs. ovate or oval, petiolate, entire, scabrous. Not hardy. A bean 

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



17. SERICOCARPUS, Nees. WHITE-TIPPED ASTER. Rayfls. 4 6, 

 S : disk fls. C 10, 5 . Invol. oblong, imbricated. Scales appressed, white 



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

 Pap. simple. 2f With alternate Ivs. and close corymbs. Rays white. 



1 S. solidagineus Nees. Smooth; Ivs. linear-oblanceolate, obtuse, entire, sessJe; 



heads subseesile ; scales obtuse ; pap. white. Woods: com. 2f. Rays long. Jl. .lu<r. 



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



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



3 S. tortifolius Nees. Grayish pubescent ; Ivs. short, oblong-obovate, sess., twisted 



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



