226. COMPOSITAE 57g 



342. Heads in corymbs. Central flowers sterile. Pappus none. — Species 



3. South Africa Stilpnophytum Less. 



Heads few together at the ends of the branches. Flowers all fertile. — 

 Species 3. South Africa. (Including Adenosolen DC. and Brachymeris 



DC.) Marasmodes DC. 



343- (331) Female or neutral marginal flowers with a thread-shaped corolla 



or without a corolla 344 



Female or neuter marginal flowers with a strap-shaped corolla. . 350 



344. Hermaphrodite flowers 4-merous. Herbs or undershrubs. . . . 345 

 Hermaphrodite flowers 5-merous. Marginal flowers with a corolla. . 349 



345. Involucral bracts of two kinds, the outer four broad and membranous, 



the inner numerous, longer and narrower, scarious. Marginal flowers 

 in one row, without a corolla. Corolla of the central flowers with a 

 large appendage enclosing the fruit. Pappus none. Leaves opposite. 

 Heads stalked, solitary, terminating the branches. — Species 2. South 



Africa Otochlamys DC. 



Involucral bracts equal or nearly so 346 



346. Involucral bracts in 3 — 4 rows, the outer shorter. Marginal flowers with 



a corolla. Outer fruits compressed and hairy, the inner 4-angled, 

 glabrous. Leaves fan-shaped or pinnately divided. (See 333.) 



Schistostephlum Less. 

 Involucral bracts in i — 2 rows, about equal 347 



347. Heads stalked, solitary, terminating the branches. (See 216.) Cotula L. 

 Heads sessile or arranged in racemes or corymbs. Marginal flowers with 



a corolla. Leaves undivided 348 



348. Female flowers in one row. — Species i. Island of Rodrigues. 



Abrotanella Cass. 



Female flowers in several rows. Pappus wanting. — Species i. Tropics. 



[Myriogyne Less.) Centipeda Lour. 



349. Heads in racemes or spikes sometimes arranged in elongated (not corymb- 



like) panicles. Involucral bracts in few rows. Marginal flowers in one 

 row. Fruits without ribs and without a pappus. (See 222.) 



Artemisia L. 



Heads solitary or in corymbs. (See 219.) . . . Chrysanthemum L. 



350- (343) Involucral bracts in many rows, imbricate, the outer much 



shorter 35^ 



Involucral bracts in few rows, about equal in length 352 



351. Leaves decurrent, undivided. Herbs. Heads in corymbs. Hermaphrod- 



ite flowers 5-merous. Fruits glandular-hairy. Pappus of scales. — 



Species i. South Africa Lepidostephium Oliv. 



Leaves not decurrent. (See 219.) Chrysanthemum L. 



352. Involucral bracts broad. Herbs. Leaves dissected 353 



Involucral bracts narrow. Shrubs or undershrubs. Leaves entire, 



toothed, lobed, or cleft. Corolla-limb of the ray-flowers elongate, 

 entire. 354 



