LXX. COMPOSITtE. 



173 



18. DIPLOPAPPUS, DC. 



Heads many-flowered, radiate ; rays female, in 1 row ; disk- 

 flowers 5-tootlied, perfect. Eeceptacle flat, someAvhat honey- 

 combed. Involucre imbricate. Acbenes compressed. Pappus 

 double, the outer of short, inner of long, rough bristles. — Fl. 

 Cap. iii. p. 84. 



Mucli-branched shrubs or rigid simple stemmed herbs, differing ivomAster 

 in the pappus. — 5 Cape species, dispersed. 



19. ERIGERON, Linn. 



Heads many-flowered, heterochromous, radiate ; rays female, 

 in many rows, linear, equalling the disk (or longer) ; disk- 

 flowers tubular, 5-toothed, either all perfect, or the outer 

 female, or all abortive. Eeceptacle nude, honeycombed, or fim- 

 brilliferous. Achenes compressed, beakless. Pappus bristle- 

 shaped, rough, in 1 row. — Fl. Cap. iii. p. 86. 



A large, chiefly Northern genus. E. Canadense, Linn., a species of 

 American origin, now universally dispersed, is naturalized in the Eastern 

 districts and at Natal. Eoot annual ; stem much-branched ; leaves hnear- 

 lanceolate, ciliate ; heads small, very many, in panicles ; rays very narrow, 

 scarcely longer than the involucre. 



20. NIDORELLA, Cass. 



Heads many-flowered, homochromous, radiate ; rays female, 

 very shortly ligulate or 2-labiate, in 1, 2 or several rows ; disk- 

 flowers 5-fld, perfect, the central sometimes sterile. Invo- 

 lucre imbricate. Eeceptacle honeycombed. .Anthers without 

 tails. Achenes oblong, terete 'or subcompressed, mostly 

 downy. Pappus in 1 row, of rough bristles, slightly connate 

 at base. — Fl. Cap. iii. p. 86. 



Herbs or undershrubs, chiefly South African. Leaves alternate, toothed 

 or entire. Heads corymbose, rarely sohtary ; disk and ray -flowers yellow. 

 — 16 species, dispersed. 



21. GARULEUM, Cass. 



Heads many-flowered, monoecious, radiate ; ray-flowers li- 

 gulate, female; disk-flowers 5-toothed, male, with abortive 

 ovaries. Eeceptacle convex, nude. Involucral scales 2-seriate. 

 Style of disk-flowers with divergent arms, hairy outside, glan- 

 dular at the margins inside. Achenes of ray obovate-oblong, 

 3-4-ribbed, beakless, roughish ; of disk flat, smooth, empty. 

 Pappus O.—Fl. Cap. iii. p. 92. 



South African undershrubs, with alternate, pinnatifid and toothed leaves. 

 Heads peduncled, solitary ; rays blue ; di^k yellow.— 3 species, dispersed. 



