LEGUMINOSZ-CZSALPINIEZ. 117 
(figs. 92-95). It is completely outside the two lateral sepals 
(4 und 3), of which 4 is overlapped on both sides, while 3 overlaps 5 
on the other ; this last petal is posterior, like 2, which overlaps on 
both sides. Sepal 2 is a little larger than 1, while 4 and 5 are much 
the thinnest and largest of all! The corolla consists of five 
alternating petals, which may be of nearly equal sizes or else 
Cassia floribunda. 
Fie. 94. Fra. 95. 
Flower (3). Diagram. Longitudinal section of fruit. 
unequal: the posterior, termed the vexillary petal, is quite in- 
ternal in the bud, usually most dissimilar to the rest: while the 
enveloping lateral petals are symmetrical to one another; they are 
overlapped by the anterior pair, of which again one overlaps the other 
along the anterior edge (fig. 94). The androceum consists of two 
quinary whorls of stamens, five superposed to the sepals, five to the 
petals. Of the former set the three superposed to the anterior sepals 
are fertile and usually the largest of all ; of the latter the four anterior, 
though much smaller, are also fertile. The remaining three are 
represented by little membranous sterile scales. Of the seven fertile 
stamens each possesses a free hypogynous filament, which is longer 
and more curved as it is more anterior; and a basifixed tetragonal 
two-celled anther, at first divided into four locelli, and opening at the 
apex, which forms a beak of variable form, by two short clefts that 
unite on top, so as to mark outa little introrse triangular flap with its 
base downwards.’ The ovary, supported ona foot of variable length 
10On the floral symmetry of Cassia, see  tinguishes these species of the genus Cassia, 
H. By., in Adansonia, ix. 212. where the grains when moistened _become 
* The pollen consists of elongated grains in spheres with three smooth bands (C. Trinitatis), 
three, or more rarely one or two furrows, and those where the bands are papillate (C. 
H. Moun (dam. Se. Nat., sér. 2, iii. 342,) dis. biflora, levigata, maryiandica.) 
