356 Introductory View of the 
more especially in G. Robertédnum, which may often be seen 
in the autumn, of one deep and vivid crimson. In this order 
is placed the splendid genus Bréwnea, named, not from the 
celebrated botanist now living, but from a physician of the 
last century, who published a natural history of Jamaica. The 
principal genera in the sixth order, Dodecéndria, are Mon- 
sonia, and Astrape’a; the latter named from a Greek word 
signifying lightning, in reference to the splendour of its 
flowers. The a order, Polydndria, contains several ex- 
tensive and important genera, as the mallow (Malva) ; Hibis- 
cus; cotton plant (Gossypium); the silk-cotton tree (Bombax); 
the sour gourd (Adanson/a), said to have a thicker trunk than 
any other known tree; the Caméllza, in which genus some 
botanists include the tea tree, and other trees and shrubs of 
surpassing beauty. 
The character of the seventeenth class, Diadélphia (two 
brotherhoods), is the combination of the filaments in two sets, 
equal or unequal. These are sometimes observed slightly to 
cohere at the immediate base. The orders are four, distin- 
guished, as in the last and the next class, by the number of 
stamens. Pentdndria contains only a few genera of inferior 
note; Hexdéndria consists chiefly of the beautiful genus Fu- 
maria; the milkwort (Pol¥gala) is the principal genus in the 
third order, Octandria ; the great wealth of the class is in the 
fourth order, Decdndria, which holds a high rank both for the 
utility and beauty of its productions. The genera have papilio- 
naceous flowers (butterfly-like: from papilio, a butterfly) ; and, 
in consideration of their family likeness, many have pees 
admitted which more properly belong to Monadélphia. The 
license is perhaps to be regretted, as there are still some 
papilionaceous plants excluded; if, in a flower of this form, 
there be ten stamens perfectly distinct, it Irs its place in the 
tenth class: if the stamens be in any way combined, it will be 
found in Diadélphia. ‘The young botanist will mostly find 
nine of the stamens combined, and one simple, in the flowers 
of this order; the calyx of one leaf, five-cleft at the margin, 
the lower segment longer, the two upper rather shorter, than 
the lateral segments, and the corolla of five petals, all affixed 
to the receptacle. Two of the petals cohering at the lower 
side, form a boat-shaped cavity, termed the keel, in which the 
pistil and stamens are lodged, taking the same curved direc- 
tion; two other petals, called the wings, are placed at the 
aa of the keel; while the fifth, termed the standard, longer 
and broader than the rest, crosses and rests upon the upper 
side of the keel, closing in the stamens and pistil. The com- 
bination of the filaments usually corresponds with the length 
