366 COMPOSURE. Soliva. 



S. xasturtiif6lia, DC. 1. c. Mncli depressed, spreading, small: leaves glabrate, pinnately 

 parted into 5 to 9 ol)long divisions of about a line in length; these entire or tlie lower few- 

 toothed : heads globular : akenes small, very numerous, villous at apex, cuiieate, the margins 

 mucli thicliened and tuberculate-rugose : style short and slender. — Torr. & Gray, 1. c. 

 Gymnast ijles nasturtiifolla, Juss. Ann. Mus. iv. 2(i2, t. 61, f. 2. G. stolonifera, Nutt. Gen. ii. 

 185; Ell. Sk. ii. 473. — A humble weed, near dwellings, coast of N. Carolina to Georgia. 

 (Nat. from Buenos Ayres.) 



176. COTULA, L. {KoTvX-q, a small cup or disk.) — Low herbs of the 

 southern hemisphere, one or two naturalized in the northern, strong-scented ; 

 leaves alternate, lobed or dissected ; flowers yellow : ours more or less jserennial 

 by creeping base, or annual. — Benth. & Hook. Gen. ii. 428. 



C. coRONOPir6LiA, L. Somewliat succulent, nearly glaln-ous : ascending stems often a foot 

 high : leaves lingulate-liuear, laeiuiate-pinnatifid, or uppermost entire, the base clasping or 

 sheathing : head mucli depressed, a third to lialf inch broad : female flowers a single row, on 

 flattened pedicels which lengthen in fruit, their akenes bordered witli a tliick spongy wing 

 and notched at botli ends : disk-akenes with wing reduced to a tliiclvcned border. — Lam. 111. 

 t. 700; Dill. Elth. t. 23; DC. Prodr. vi. 28. — Wet ground, thorouglily established on the 

 coast of California, and on some water-courses in the interior : a rare ballast-weed on the 

 Atlantic coast. (Nat. from S. Afr.) 



C. austrAlis, Hook. f. Slender, diffusely branched, somewhat pube.sceut : leaves 2-pinnately 

 dissected into linear lobes : heads small : female flowers in 2 or 3 rows, their akenes dis- 

 tinctly pedicelled; those of the disk less so. — Fl. N. Zeal. i. 128; Gray, Bot. Calif, i. 405. 

 Stroninjlosperma australe, Less.; DC. 1. c. 82. — Waste ground, coast of California. Kellogg, 

 Cleveland. Oregon, E. Hall. (Sparingly nat. from Australia.) 



177. TANACETUM, Tourn. Tansy. (Name of the old herbalists, of 

 quite uncertain derivation.) — Cliiefly perennials, ,of the northern hemisphere, 

 strong-scented, alternate-leaved, yellow-flowered. Disk-flowers 5-toothed. — Torr. 

 & Gray, Fl. ii. 414. 



§ 1. Robust erect jierennials, leafy to the summit: leaves 2-3-pinnately dis- 

 sected into very numerous divisions and lobes ; also with interposed small ones 

 on the main rhachis : pappus coroniform-dentate,: receptacle flat, quite naked. — 

 § Eutanacetum & Omalotes. DC. Prodr. vi. 128. 83. 



T. vulgAre, L. (Common Tansy.) Acrid-aromatic, glabrous or somewhat pubescent, 2 or 

 3 feet high : divisions and lobes of tlie leaves decurreut-confluent, the teetli cuspidate-acumi- 

 nate : heads numerous and crowded in tlie corymbiform cymes, 3 to 5 lines l)road, depressed- 

 hemispherical : ray-corollas terete, inconspicuous, with oblique 3-tootlied limb. — Escaped 

 from gardens to roadsides, &c., in Atlantic States and Canada. (Nat. from Eu.) 



T. Huronense, Nutt. Comparatively sweet-aromatic, villous when young, sometimes gla- 

 brate, commonly a foot high : leaves with fewer interposed segments on tlie rhacliis ; lobes 

 and teeth narrowly ol)long to linear, mucronate or acuminate: heads much fewer (1 to 5) 

 and larger ; the di.sk convex, lialf-inch Itroad : corollas of female flowers with a flattish tube 

 and a 3-5-lobed limb, which not rarely expands into a cuneate rather obvious ligule (thus 

 making a transition to C!tri/s(nifhemuin and showing relationship to C. bipiniuilnm). — Gen. 

 ii. 141 ; Torr. & Gray, Fl. ii. 414. T. Douglasii, DC. Prodr. vi. 128. T. pfviciflorum, 

 Richards. App. Frankl. Jouru. ed. 2, 30 : Hook. Fl. i. 327, not DC. T. horealr, Nutt. Trans. 

 Am. Phil. Soc. n. ser. vii. 401, not Fischer in DC, wliich is rather a form of T. vulgare. — 

 Banks of streams, fee, N. Maine ( Goodale), New Brunswick, and Lake Superior to Hudson's 

 Bay, west to Washington Terr, and Oregon on the coast. 



T. camphoratura, Less. Pleasantly camphoric-aromatic, villous-tomentose, at least when 

 young, glandular, robust, 1 or 2 feet high : pinna; and segments of the leaves much crowded ; 

 the hitter oval or short-oblong, entire or crenately few-lobed, rounded-obtuse, at most callose- 

 apiculate, usually with revolute margins : heads several in a corymbiform cluster, short- 



