}6i Plants and their IVavs in South Africa 



flattened at tlie tip. Flowers all tubular. Stigmatic papilla 



in marginal rows. 



Ageratum. — Heads many-flowers, roundish, clustered 



in corymbs. Pappus 5-10-toothed scales. Herbs with ovate 



or heart-shaped leaves on long petioles. r''lowers mauve. Often 



cultivated ; found in Natal. 



Tribe HI. Astere.*. — Style branches long, flattened, 



often crossing instead of curling backivards. Heads usually with 



ray flowers. Stigmatic papillcE marginal, tips unreceptive. 



Aster. — Heads many-flowered. Ray flowers, and usually 



disc flowers bearing fruit. Involucre of overlapping scales. 



Achenes flattened. Pappus of many saw-toothed bristles of 



equal length. Flowers with white, pink, or purple rays and 



yellow or purple discs. Herbs or shrubs with often small, 



rarely petioled leaves. A large genus. 



Diplopappus. — Flowers as in Aster, except the pappus of 



two rows, the outer of short, the inner of long bristles. Much 



branched shrubs or rigid simple herbs. 



Trike IV^ Senecionide-e. — Style branches linear, flattened 

 at the top, bristly at the apex, 

 or tipped ivith a bristlv cone. 

 Flowers all tubular or 'with ray 

 and disc flowers. 



A. Anthers 'without tails : 

 pappus of large scales — 



Sphenogyne. — Heads radi- 

 ate, but the disc flowers bear 

 the fruit. The receptacle bear- 

 ing papery scales (palea;) among 

 the flowers. Involucre of over- 

 lapping scales, the inner larger 

 with papery tips. Achenes 

 surrounded at Ixise with long 

 silky hairs. Pappus of five broad 

 scales, spirally rolled before the 



flower opens ; much enlarged in fruit and milk-while. 



Herbs or shrulis witli simple or compound lea\e.s, strongly scented. 

 Mowers yellow, often copper-colour beneath. 



\'\c,. 34g. — \ph II ^1'/ uii/llrhl- 

 oidi-i, R. Br. Aclirnc with 



scaly pappus. (From Hdnionds 

 and Marlolh's " Elementary 

 Botany for .South Africa ".) 



