580 226. COMl'ÜSITAE 



353. Corolla of the ray-flowers yellow, very shortly strap-shaped. Fruits 



compressed, i — 2-ribbed, without a pappus. Heads solitary on long 



stalks thickened above. (See 216.) Cotula L. 



Corolla of the ray-flowers white, usually long strap-shaped. Fruits 

 usually several-ribbed and provided with a pappus. (See 334.) 



Matricaria L. 



354. Ray-flowers fertile. Disc-flowers 5-merous. Fruits 8 — lo-ribbed, gland- 



ular-warted. Leaves linear or divided into 3 hnear segments. — Species 

 7. South Africa. (Including Adenachaena DC. and locasfe E. Mey.) 



Phymaspermum Less. 

 Ray-flowers sterile. Disc-flowers 4-merous 355 



355. Corolla-lobes of the disc-flowers acuminate. Involucre campanulate. 



Heads short-stalked. Leaves linear, entire. Shrubs. — Species 2. 



South Africa Thaminophyllum Harv. 



Corolla-lobes of the disc-flowers not acuminate. Involucre hemispherical. 

 Heads long-stalked. Leaves lobed or cleft. Undershrubs. — Species 3. 

 South Africa Lidbeckia Berg 



356. (316.) Receptacle with scales between the flowers 357 



Receptacle glabrous, rarely hairy, without scales between the flowers. 383 



357. Pappus of 5 — 6 large scales sometimes intermixed with bristles. Fruits 



lo-ribbed, not compressed. Involucral bracts in several rows, scarious 

 at the edges. Ray-flowers in one row, neuter, with a yellow, strap-shaped 

 corolla. Style-branches truncate, with a terminal crown of hairs. 

 Herbs or undershrubs. Leaves alternate, usually toothed or pinnately 

 divided. Heads solitary or in lax panicles. — Species 65. South Africa 

 and Abyssinia. (Including Sphenogyne R. Br.) . . Ursinia Gaertn. 

 Pappus wanting or crown-shaped or consisting of bristles or minute 

 scales, rarely of i — 2 or 8— -16 larger scales. Involucral bracts rarely 

 scarious at the edges. Leaves usually opposite. [Tribe HELIANTH- 

 EAE.] ■ 358 



358. Pappus of feathery bristles. Fruits hairy, angular. Involucral bracts 



subequal, in 2—3 rows. Ray-flowers yellow, with a strap-shaped corolla. 

 Prostrate herbs. Leaves opposite, broad, toothed. Heads on long 

 stalks. — Species i. Naturalized in South Africa, Madagascar, and 



the neighbouring islands Tridax L. 



Pappus of simple (not feathery) bristles or of scales sometimes united 

 into a crown, or wanting 359 



359. Pappus, at least on the inner fruits, formed of 8 — 16 rather large, fringed 



scales. Fruits angular. Receptacle conical. Marginal flowers in one 

 row, white, fertile, rarely wanting. Involucral bracts in i — 2 rows, 

 embracing the outer fruits. Heads small, hemispherical. — Species i, 



Naturalized in East Africa Galinsoga Ruiz & Pav. 



Pappus formed of minute scales or of i — 2 larger scales or of bristles, or 

 crown-shaped, or wanting 360 



