Classification of Plants 225 



heads. They are delightfully fragrant. The sepals form a 

 short tube. 



Trees with twice-pinnate leaves, except in the Australian 

 wattles, which often develop the blade only in the first few 

 leaves. The petiole becomes flattened (Phyllodes) with the 

 edge turned toward the sun. 



A. horrida (Karroo Thorn or Doornboom) has ivory- 

 white thorns (stipules). A . giraffe \\:is strong brown thorns. 



Elephantorhiza (Eland's bontjes) is a small glabrous 

 shrub with very large roots. Stamens 10. Capsule opening 

 like a siliqua. 



Sub-tribe C^esalpine^. 



Cassia. — Flowers nearly regular, yellow. Stamens 10, or 

 the 3 upper wanting. In some the lower anthers are longer, 

 and open by terminal pores. These brush against the insect's 

 body while it is eating pollen from the upper ones. The 

 ovaries bend to the right in some flowers, toward the left in 

 others. Trees or shrubs. Eastern. 



j. Scholia. — A handsome Eastern tree, with panicles of 

 crimson or pink flowers. S. latifolia (Boer boom) has mona- 

 delphous stamens. Each seed has a yellow cup-like arillus. 

 The pods are roasted for food. 



Sub-tribe Papilionace.e. 



A. Stamens free. 



Podalyria.— Legume rounded, woolly. Leaves simple or 

 palmately compound. 



Silvery-leaved shrubs with deciduous stipules. Flowers purple, rosy, 

 or bluish white. 



Virgilia. — Legume flattened, woolly, stuffed between the 

 seeds. Calyx silky. Flowers rosy purple. 



V, capensis^ the Wilde Keurboom, is a tree found alono- 

 river-sides throughout the Colony. Leaves compound. 

 Leaflets becoming smooth above, woolly, and rolled beneath. 



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