366 COMPOSITE. Soliva. 



S. NASTnRTirF6LiA, DC. 1. c. Much depressed, spreading, small: leaves glabrate, pinnately 

 parted into 5 to 9 oblong divisions of about a line in lengtli ; these entire or the lower few- 

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

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

 Gymnast i/!es nasturtiifolia, Juss. Ann. Mus. iv. 2()2, 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. C6TULA, 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 perennial 

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



C. coronopif6lia, L. Somewliat succulent, nearly glabrous : ascending stems often a foot 

 high : leaves lingulate-linear, laciniate-pinnatifid, or uppermost entire, the base clasping or 

 sheathing : head much depressed, a third to half inch broad : female flowers a single mw, on 

 flattened pedicels which lengthen iu fruit, tlieir akenes bordered with a thick spongy wing 

 and notclied at both ends : disk-akenes with wing reduced to a thickened border. — Lam. 111. 

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

 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 pubescent : leaves 2-pinnately 

 dissected into linear lobes : heads small : female flowers iu 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. 

 StTonijylosperma australe, Less. ; DC. 1. c. 82. — Waste ground, coast of California. Kdlog<j, 

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



177. TANAC:6TUM, Tourn. Tansy. (Name of the old herbalists, of 

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

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

 & Gray, Fl. ii. 414. 



§ 1. Robust erect perennials, 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. (Comjion Tansy.) Acrid-aromatic, glabrous or somewhat pubescent, 2 or 

 3 feet high : divisions and lobes of the leaves decurrent-confluent, tiie teeth cuspidate-acumi- 

 nate : heads numerous and crowded in the corymbiform cymes, 3 to 5 lines broad, depres.sed- 

 hemispherical : ray-corollas terete, inconspicuous, with oblique 3-toothed 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 the rhachis ; lobes 

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

 and larger; the disk convex, half-inch broad: corollas of female flowers with a flattish tube 

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

 making a transition to Ckri/santhemuin and showing relationsiiip to C. bipinnatum). — Gen. 

 ii. 141 ; Torr. & Gray, El. ii 414. T. Douglasii, DC. Prodr. vi. 128. T. pnncjflorum, 

 Richards. App. Frankl. Journ. ed. 2, 30 ; Hook. Fl. i. 327, not DC. T. boreafe, Nutt. Trans. 

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

 Banks of streams, &c., N. Maine ( Gnndale), New Brunswick, and Lake Superior to Hudson's 

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



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

 young, glandular, r(d)ust, 1 or 2 feet high : pinna3 and segments of the leaves much crowded ; 

 the latter oval or short-oblong, entire or crenately few-loi)c<l, rounded-obtuse, at most callose- 

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



