322 XXXIX. COMPOSITAE. [Cotula. 



steins wiry. Leaves Jin. long. Head j\jin. in diameter .. .. ..10. G. filiformis. 



Leaves tufted, pubescent, glandular, incised. Heads Jin.-Jin. in diameter. 



Achene unequally plano-convex . . . . . . . . . . 11. G. Haastii. 



Leaves tufted ; segments subulate. Achenes ouneate . . . . . . 12. C pectinata. 



Branches numerous, prostrate. Leaves oblong-cuneate, sessile, 3-toothed at 



the apex, downy . . . . . . . . . . . . . . 13. C. Featherstonii. 



Stems prostrate, rather stout. Leaves laxly imbricating, vertically pectinate. 



Heads terminal, Jin. in diameter . . . . . . . . . . li. G. Ooyeni. 



** Heads unisexual. 

 Leaves linear-spathulate, entire. Scapes with 4-8 short bracts, strict, erect . . 15. C. linearifolia. 



Stout, glabrous. Leaves pinnatifid, fleshy or coriaceous. Scapes Jin.-3in. long 



with linear bracts . . . . . . . . . . . . 16. C. pyrethrifoUa. 



Ehizomes wiry. Leaves tufted, Jin.-lin. long, clothed with shining silky hairs. 



Heads Jin.-if-in. in diameter . . . . . . . . . . 17. C perpusilla. 



Leaves Jin.-Jin. long, shortly lobed or pinnatifid ; lobes entire . . . . 18. C. obscura. 



Leaves Jia.-2Jin. long, linear oblong, deeply pinnatifid ; lobes toothed . . 19. G. pulchella. 



Stems rather stout. Leaves usually pinnatifid, lobed or orenate. Heads 



Jin.-Jin. in diameter . . . . . . . . . . . . 20. C. dioica. 



Slender. Leaves much cut and divided, silky, pubescent. Heads Jin.-Jin. in 



diameter. . . . . . . . . . . . . . . , 21. 0. squalida. 



1. C. COronopifolia, L., Sp. PI. 892. Glabrous. Stems succulent, 

 creeping, rooting at the nodes. Branches ascending, 3in.— lOin. high. Leaves 

 alternate, often distant, sheathing at the base, linear-lanceolate to oblong, entire 

 toothed lobed or pinnatifid. Peduncles slender, axillary, exceeding the leaves. 

 Heads ^in.— Jin. in diameter, yellow ; involucral bracts narrow-oblong, obtuse. 

 Receptacle flat or convex. Ray-florets on slender flattened pedicels, 1-seriate ; 

 corolla ; achene flat, broadly winged, lobed at both ends, the upper lobe 

 equalling the bifid style, glandular on the inner face. Disk-florets on shorter 

 pedicels; corolla cylindric or almost tetragonous, 4;- toothed; wing of disk-achenes 

 narrower.— G. Porst., Prod. 300; A. Cunn., Precurs. n. 443; Hook, f., Fl. N.Z. 

 i. 127; Handbk. 141 ; Benth., Fl. Austr. iii. 549. 



Var. integrlfolia. Stems usually simple, lin.-2in. high. Leaves linear, entire, obtuse. 

 Peduncles terminal, solitary. Heads Jin. in diameter.. — C. inUgrifolia, Hook, f., M. Tasm. i. 192, 

 t. 50e, 



NOETH and SOUTH Islands : from the North Cape to Foveaux Strait ; chiefly in lowland 

 situations. STEWART Island, T. K. CHATHAM Islands, Cox I Yellow-button. Sept. to March. 

 Also in Australia, South America, South Africa, and Europe. 



2. C. australis, Hook. /., Fl. N.Z. i. 128; Fl. Tasm. i. 191, t. 50a. 

 Stems slender, much branched, diffuse, flaccid, glabrate, pubescent or woolly at 

 the nodes, 2in.-5in. high. Leaves pinnate or bipinnatifid, Jin.— liu. long; 

 pinnae entire, 3-lobed or pinnatifid ; segments linear, acute or mucronate. 

 Heads Jgin.-^in. broad ; peduncles slender, larger or shorter than the leaves ; 

 involucral bracts in 2 series, linear-oblong. Female florets in 3 rows, pedicellate ; 

 corolla 0; achenes winged, wing refuse, glandular on the inner face. Disk- 

 florets on shorter pedicels, tubular, 4-toothed ; achenes wingless. — ^Handbk. 141. 

 C. venosa, Col. in Trans. N.Z.I, xxiii. (1890) 388. Strongylosperma australis, 

 Less., Syn. Comp. 261. 



KEBMADEC Islands. Prom the North Cape to Otago ; CHATHAM Islands. Chiefly in 

 lowland districts. Oct. to March. Also in Australia and Tristan d'Aounha, 



