57Ö 22Ö. COMPOSITAE 



Leaves pinnatipartite. — Species 6. Central and North-west Africa.. 

 Some of the species are used as ornamental or medicinal plants. 



S£:ntolina L. 

 Corolla-tube without an appendage, not compressed. Fruits 5-angled. 

 Heads in usually dense corymbs. — Species 55. Southern and tropical 

 Africa. (Including Bembycodium Kunze and Oligodora DC.) 



Athanasia L. 



331. (318.) Heads with all the flowers hermaphrodite 332 



Heads with the inner flowers hermaphrodite, the outer female or neuter. 343 



332. Flowers 4-merous 333 



Flowers 5-merous. . ' 336 



333. Involucral bracts in several rows, the outer shorter. Fruits 4-angled, 



glabrous. Herbs or undershrubs. Leaves dissected. Heads rather 

 small. — Species 6. South and East Africa. (Lender Tanacetum L.) 



Schistostephium Less. 

 Involucral bracts in i — 3 rows, nearly equal 334 



334. Pappus ring- or crown-shaped. Herbs. Leaves pinnately divided. — 



Species 20. Some of them are used as ornamental or medicinal plants 



(camomile). (Including Chamaemelum Vis., Chlamydophora Ehrenb., 



Courrantia Schultz, and Otospermum Willk.) .... Matricaria L. 



Pappus wanting 335 



335. Stem herbaceous. Heads solitary at the ends of the branches. (See 



216.) Cotula L. 



Stem woody, shrubby. Leaves entire. Heads in corymbs. Fruits 

 compressed, glabrous. — Species i. South Africa. . . Peyrousea DC. 



336. Heads in leafy racemes or spikes sometimes arranged in elongated (not 



corymb-like) panicles. Pappus wanting. (See 222.) Artemisia L. 

 Heads solitary or in corymbs 337 



337. Involucral bracts in i — 3 rows, nearly equal. Herbs. Leaves pinnately 



divided. (See 334.) Matricaria L. 



Involucral bracts in several rows, the outer ones shorter 338 



338. Stem herbaceous. Leaves alternate. (See 219.) . Chrysanthemum L. 

 Stem woody, shrubby 339 



339. Leaves opposite. Pappus wanting 340 



Leaves alternate 341 



340. Heads in corymbs. Involucral bracts in few rows. Fruits with 12 — 15 



ribs. Leaves usually forked. — Species 2. South Africa. 



Gymnopentzia Benth. 



Heads solitary, seated between lateral tufts of leaves. Involucral bracts 



in many rows. Fruits 3 — 4-ribbed. Leaves entire, connate in pairs 



at the base. — Species i. South Africa Asaemia Harv. 



341. Leaves toothed, lobed, or divided. Fruits 5-ribbed. — Species 20. 



South Africa and southern Central Africa. Some are used medicinally. 



Pentzia Thunb. 

 Leaves entire 342 



