258 Plants and thew Ways in South Africa 



Lycium.— Anthers opening lengthwise. Calyx unaltered after 



flowering. 

 Fruit a capsule. 



Datura. — Calyx deciduous. Fruit a thorny 4-celled capsule, 

 Nicotiana. — Calyx persistent, bell-shaped, S'^^. Capsule 2-celled, 



many-seeded. 

 Betzia. — Calyx deeply lobed. Corolla tubular. Capsule few-seeded 



II. 



Fig. 261. — I. Floral diagram of Hallena flower. II. Bilocular ovary 

 o{ Antirrhiman. (From Edmonds and Marloth's "Elementary 

 Botany for South Africa.") 



Solanum. — Corolla wheel- shaped, white, yellow, or purple. 

 Anthers yellow, forming a cone, as in some of the Bora- 

 ginaceae. 



A large genus of herbs, shrubs, or trees, often prickly or spiny. Often 

 densely covered with star-shaped hairs. The potato and tomato, natives of 

 South America, belong to this genus. The berries are showy, bright red, 

 yellow, or blue. By cultivation, the number of carpels in the tomato has 

 been increased. 



Physalis. — This genus may be recognized by the bladdery 

 calyx. /^./^;7/wVz;/cns the "Cape Gooseberry." Other species 

 of this genus are native. 



Lycium. — Small trees, often with spiny thorns, funnel- 

 shaped. Reddish flowers. L. afrum (Kaffir thorn) is used 

 for hedges. 



Datura. — The shrub in many gardens with large white 

 hanging bells and thorny capsules belongs to this genus. 



D. siranioniuni. — Tlie ])urple stramonium grows in waste places. 

 Bees are debarred from this flower by the inward turn of the stamens, but 

 the long tongue of moths can reach the nectar. 



