SOLIVA COMPOSITAE 363 



COTULA 



with rigid wings or callous margins which are commonly spinu- 

 lose-pointed at summit and the apex armed by the spiniform per- 

 sistent style. Pappus none. 



S. sessilis Ruiz & Pav. 1. c. Villous or the leaves glabrate: stems 

 slender, 2-4 inches high, branched : leaves thrice divided, primary divi- 

 sions 8-5, petiolate, parted into 3-5 narrow lanceolate lobes : heads de- 

 pressed, achenes broadly obovate, thin-winged, spinulose-pointed at the 

 summit, in some the wings reduced to an acute margin: style persistent, 

 long and stout. Moist ground near the coast, Chetco, Oregon, to Califor- 

 nia and Chili. 



75 COTULA L. Gen. n, 968. 



Low herbs with alternate lobed or dissected leaves and slender- 

 peduncled heads of yellow flowers. Heads many-flowered, dis- 

 coid, heterogamous. Bracts of the involucre greenish, in about 

 2 ranks. Pistillate flowers in 1-2 rows, apetalous, with deciduous 

 style; disk-flowers with 4-toothed corollas. Achenes raised on 

 pedicels at maturity, obcompressed, commonly thick-margined 

 or narrowly winged, in our species nearly or quite destitute of 

 pappus. 



C. CORONOPIFOLIA L. Sp. 892. Somewhat succulent, nearly glabrous : 

 stems ascending, 4-12 inches long: leaves lingulate-linear, laciniate-pin- 

 natifid, or the uppermost entire, with clasping or sheathing base: heads 

 much depressed, 4-6 lines broad : pistillate flowers a single row, on flat- 

 tened pedicels their achenes bordered with a thick spongy wing, notched 

 at both ends; disk-achenes with wings reduced to a thickened border. 

 Wet grounds near the coast, Oregon and California. Naturalized from 

 Australia. 



C. AUSTRALis Hook. f. Fl. Nov. Zel. 128. Somewhat pubescent : stems 

 slender, dififusely branched : leaves bipinnately dissected into linear lobes : 

 heads small; pistillate flowers in 2-3 rows, their achenes distinctly pedi- 

 celed ; those of the disk less so. Coast of California and Oregon. Nat- 

 uralized from Australia. 



76 TANACETUM Tourn. L. Gen. n. 944. 



Herbs or suffruitcose plants with alternate variously dissected 

 leaves and solitary or corymbose heads of yellow flowers. Heads 

 many-flowered, discoid, the flowers all tubular and perfect, with 

 3-5-toothed corolla, or the marginal ones pistillate with more or 

 less oblique or imperfectly ligulate corolla. Bracts of the invo- 

 lucre imbricated, in few or several ranks. Styles deciduous. 

 Achenes 5-ribbed or 3-5-angled, with broad truncate summit, 

 bearing a coroniform pappus or none. 



§ 1 Robust erect perennials, leafy to the top. Leaves 3-3- 

 ■pinnately dissected into very numerous divisions and lobes often 

 with interposed small ones on the main rhachis. Receptacle flat, 

 quite naked. Pappus coroniform-dentate. 



T. Tulgare L. Sp. 844 (Tansy). Glabrous or somewhat pubescent: 

 stems 1-3 feet high, usually simple up to the inflorescence : leaves 4-12 

 inches long, pinnately divided into linear-oblong pinnatifid or incised seg- 

 ments, the lobes acute, usually serrate: heads numerous, crowded in a 



