 §60 POLYANDRIA MONOGYNIA, Mimosa. 
tree, or large ramous shrub, with numerous, interwoven, 
flexuose branches, covered with a dark brown bark, dot- 
ted with white. ; 
Spines united at the base, often very large, round, ta- 
pering to an acute, hard, brown point, the rest white, and 
smooth, particularly when young. Inwardly hollow, and 
the habitation of ants. From the fork, where the two 
unite, often a small branchlet, or leafissues. Leaves bi- 
pinnate, in the young growing shoots they are solitary, 
from the fork of the spines all over the older branches seve- 
ral are frequently found together. Pinne from three to five. 
pair, opposite and rarely an inch long. Leaflets from ten 
to twelve pair, minute, smooth, Petioles common, acute, 
pointed, with a gland on the upper side a little below the 
first pair of pinnee. Stipules no other than the spines. Pe- 
duncles generally in pairs, from the axills of the spines, 
and mixed with leaves, short. Spikes cylindric, about 
as long as the leaves, Flowers polyandrous, rather re- 
mote, fragrant, pure white when they first expand, but 
becoming yellow. Calyx minute, from four to five-tooth- 
ed. Corol three or four times longer than the calyx, from 
four to five-cleft. Stamens numerous, distinct, Germ ob- 
liquely oval. Style crooked, as long as the stamens. Te- 
gume thin, broad-falcate, three or four-seeded. ERY 
33. M. fera. Lour. Cochin Ch. 801. 
Thorns solitary, often much branched. Leaves bipin- 
nate and pinnate ; when bipinnate the pinne are from. four . 
to eight pairs ; leaflets sub-alternate, from six to tem pails~_ 
Spikes axillary, cylindric; Corollets with from five a. 
ten stamina. Legumes long, linear, variously bent. 
Gleditsia horrida. Willd. 4. 1098. 
A native of China and Cochin China ; “young ixces Ze 
reared in the Botanic garden at Calcutta, from seeds. af, 
Gleditshia triacanthos received from America, do 2Ot 
in any respect differ from our China plant, which 
