108 ON THE PROPAGATION AND CULTIVATION OF PLANTS. 



gacautha was formerly considered as the plant yielding the gum 

 Tra^acanth of commerce, but Olivier discovered that it was 

 generally procured from A. veras. It is probable that both species 

 yield this gum, and perhaps some others. A. veras is a native of 

 the north of Persia, flowering in July and August. The seeds of 

 A. boeticus are roasted, ground, and used as a substitute for coffee 

 in Hungary. Named by Linnjeus, from aster, a star ; and gala, 

 milk. 



Genera 39. Biserrula, or Hatchet Vetch. CI. 17, or. 4, sp. 1. 

 La Pelecine, Fr. ; Das Segekraut, Ger. ; Zaagpeul, Dutch. B. 

 pelecinus is a hardy annual, bearing purple flowers, and requires 

 only to be sown in the open borders. Named by Linn.eus, from 

 hies, twice, and serrula, a little saw; the seed-pods being tooth- 

 letted on each edge. 



Genera 40. Barbieria. CI. 17, or. 4, sp. 1. Named by De- 

 candolle, in honour of a celebrated French botanist, G. B. G 

 Barbier, M. D. 



Genera 41. Borbonia. CI. 17, or. 4, sp. 8. Cape shrubs of 

 easy culture and propagation. Raised by means of young cuttings 

 placed in pots of sand under a bell-glass, and afterwards grown in 

 an equal mixture of peat and loam. Named by Linnaeus, in 

 honour of Gaston Bourbon, Duke of Orleans, son of Henry IV, 

 of France, a great lover and patron of botany. 



Genera 42. Bossiaea. CI. 17, or. 4, sp. 14. A beautiful 

 genus of New Holland evergreen shrubs, succeeding well in an 

 equal mixture of turfy loam, peat, and sand. Cuttings not too 

 ripe will strike root planted in pots of sand under a bell-glass, not 

 too close together, as they are apt to damp off; when rooted they 

 must be potted in small thumb pots, kept in a close frame, and 

 hardened to the air by degrees ; the pot must be well drained with 

 broken potsherds, as nothing injures them more than too much 

 water. Named by VENTiNAT,in honour of M. Boissieu Lamak. 

 tinure, who accompanied the unfortunate La Perouse in his 

 voyage round the world. 



Genera 43. Crotolaria. CI. 17, or. 4, sp. 85. La Ciotalaire' 

 Fr. ; Die Klappershote, Ger. Plants of easy culture, mostly free 

 flowerers, but are shabby plants under cultivation, and possess no 

 good qualities which can render them objects of interest or beauty. 

 Propagated by meaui of §eeds ; or young cuttings] if planted 



