( 369 ). 
EXPLANATION OF THE FIGURES IN TAB. IV. 
Fig. 1. 
a. 
b. Back view of ditto. 
C. Fs 
d. Transverse section of a three-seeded berry, exhibiting an 
be 
BOT. e. HRS 
Bursera serrata. 
Front view of a flower. 
A peduncle with ripe berries. 
entire seed, a divided one, and the rudiment of a third. 
A one-seeded berry, with part of the skin removed to 
show the arilliform pulp. | 
Two pyrenes, exhibiting the external umbilicus. 
Vertical section of a seed ;—natural size. 
The same, magnified. 
Seed with its integument and rhaphe. 
Embryo viewed from the lateral and ventral sides.. 
Aspect of the embryo from the ventral side ;—magnified. 
Germinating seed. 
'The same more advanced. 
EXPLANATION OF THE FIGURES EN FAB. V. 
Fig. 1. 
ews Roe $8 
Boswellia serrata. 
Transverse section of the germ ; 
Vertical section of ditto ; 
The entire capsule. 
A transverse section of the same. 
} both magnified. 
A seed ;—the natural size. 
The same, with the integuments of one side removed. 
Vertical and transverse sections of the seed, exposing the 
embryo ;—magnified. 
The young plant, with its many-cleft cotyledons ex- 
panded, and converted into seminal leaves ;—natural 
size. 
322 Fig. - 
