45 



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

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

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

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

 first appearance, and afterwards change to pur[)le before they fall 

 of}". The fruit in liiis is the same as in the connnon sort. 



x\s the leaves of the Andrachne are larger than in the other sorts, 

 they have always a better etlect as evergreens. 



2. ALYSSUM SAXATILA. 



YELLOW ALYSSUM. 



This genus comprises several species of under shrubby, herba- 

 ceous, perennial plants of the Ahjssoii or Machoii kind, that are 

 chiefly flowery and ornamental. 



It belongs to the class and order Tetradynamia SiUcu/osa, and 

 ranks in the natural order of Si/ iquosce. 



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

 long perianthiuu), 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 filanicnls of the length of the calyx, 

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

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

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

 stigma obtuse: the pericarpium is a subglobose, emarginate silicic 

 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 

 to flliforn) receptacles issuing forth at the end of the silicle, i'cw and 

 orbicular. 



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



