B. spinosa, is also structurally more nearly connected with it than with 
any other species, and differs from it only in its “ longer branches, 
usually quite entire leaves, stouter and generally recurved spines, and 
longer calyces, the limb of which is larger and constantly 5-toothed,” 
(Bentham). ‘The flowering season for B. spinosa is in the summer, and 
it is only rarely that some few plants may be found in bloom in October 
and November. 
EXPLANATION oF PLate LXXXIV.—Fig. 1, a flower with bracts, part ~ 
of the stem and the bracts of the opposite cyme in which the flowers 
are undeveloped ; the leaves are removed: of the natural size. Fig. 2, 
stamens, style, and corolla deprived of its upper lip, magnified. Fig. 3, 
a stamen, magnified. Fig. 4, an achene, magnified. 
