45 



of petals, make no great appearance, nor do the trees produce fruit 

 in any quantity; the other is therefore preferable. That with red 

 flowers makes a pretty variety, when intermixed with the other, for 

 the outsides of shrubberies, as they are of a fine red colour at their 

 first appearance, and afterwards change to purple before they fall 

 oflf. The fruit in this is the same as in the common sort. 



As the leaves of the Andrachne are larger than in the other sorts, 

 they have always a better effect as evergreens. 



2. ALYSSUM SAXATILA. 



YELLOW ALYSSUM. 



THIS genus comprises several species of under shrubby, herba- 

 ceous, perennial plants of the Atysson or Madwort kind, that are 

 chiefly flowery and ornamental. 



It belongs to the class and order Tetradynamia Siliculosa, and 

 ranks in the natural order of Siliquosce. 



The characters of which are: that the calyx is a four-leaved, ob- 

 long perianthium, the leaflets ovate, oblong, obtuse, convergent, and 

 deciduous: the corolla four-petalled and cruciform: the petals flat, 

 shorter than the calyx, very spreading, having claws of the length of 

 the calyx: the stamina have six filaments of the length of the calyx, 

 two opposite, a little shorter, marked with a toothlet: antherae from 

 erect spreading: the pistillum has a sub-ovate germ, the style sim- 

 ple, of the length of the stamina, longer than the germ, and the 

 stigma obtuse: the pericarpium is a subglobose, emarginate silicle } 

 or broad and short pod, with a .style of the length of the silicic, two- 

 celled, the partitions elliptic, and hemispherical; the seeds are fixed 

 lo filiform receptacles issuing forth at the end of the silicic, few and 

 orbicular. 



There are many species, but those chiefly cultivated are: .1 A. spi- 



