318 THE REGIONS OF VEGETATION. 
which appear more decidedly to possess natural features, l 
shall do so in the briefest manner, merely hinting at those 
cireumstances which are likely to have a physical or general 
influence, and alluding slightly to those peculiarities which 
seem to authorize divisions. In attempting this, it will 
sometimes happen that we can only indicate what are likely 
to become regions, rather than what may now be considered 
such, when so much has to be added to our knowledge, and 
in such cases we must be guided by inference and analogy. 
(To be continued.) 
Notes on MimosEx, with a Synopsis of Species. By GEORGE 
Bentuam, Esq. 
(Continued from the Journal of Botany, vol. iv. p. 418.) 
Tribe III. Acacitzaz. 
Calyx et corolla estivatione valvata. Stamina indefinita, 
libera v. monadelpha. Pollinis granule in massas 4 v. 6, in 
quoque loculo antherarum agglomeratz, in quaque massa 16. 
XX. Acacia (JFilld.) 
Flores sepius polygami. Sepala 3-5, in calycem campa- 
nulatum coalita v. libera. Petala totidem, plus minusve coa- 
lita, rarius demum libera. Stamina numerosa (sepius ultra 
50), libera v. ima basi in cupulam brevem v. in discum peri- 
gynum breviter et irregulariter connata, rarius (in floribus 
masculis) in columnam centralem congesta, nec in tubum 
cylindricum monadelpha. Legumen varium, sæpissime 
siccum.—Arbores v. frutices, rarissime (in 4. hirta) herbe. 
Folia omnia v. saltem primordialia bipinnata, caulina in 
Phyllodineis ad petiolum foliiformem simplicem reducta, v. in 
Aphyllis omnino nulla. Glandulæ in bipinnatis ad petioli 
marginem superiorem, pefiolares infra jugum infimum pinna- 
rum majores, Jugales minores inter v. sepius paullo infra 
pinnarum paria superiora v. omnia, et nonnunquam inter 
