‘200 PRINCIPLES OF BOTANY, ETC. 
The corolla is.of every different colour, ‘but sel- 
dom green, and still seldomer black: the calyx is 
generally green, seldom of any other colour, never 
black. | | 
The filaments -are ‘commonly transparent or 
white, seldom of other - colours. 
The succulent kinds of fruit are of. all colours. 
The capsules are brown, green or-red, seldom 
black. | 
The seed is black or brown, seldom of other co- 
lours. 
N. It is remarkable, that the yellow colour :pre- 
dominates in the compound flowers and in most 
autumnal flowers. ‘White is found. chiefly in. the 
spring flowers; white and blue principally in‘ the 
flowers of cold regions; red and. richly variegated 
colours in those of warm climates. -White berries 
are commonly sweet; red, sour; blue, sweet and 
sour mixed; and. black, insipid or poisonous. 
§ 201. 
Though the botanist seldom trusts much to co- 
lour; yet it is of use to know in what way flowers 
and fruits sometimes change from one colour to 
another. | 
In general. most.colours pass into white; the red 
and the blue are most prone to change. It is not 
often that the change is made into yellow, or that 
red passes into yellow: blue very often turns to 
ved. We-shall here give.a few examples : 
Ked. passes into white-in 
Erica, Serpyllum, Betonica, Pedicularis, Dianthus, 
Agro- 
