DESCRIPTION OF THE PLATES. 
like a second and more external arillus, and is analogous in its nature and origin to the 
small basal cup of the seed shown in Zizyphus : all magnified. Fiy. 12, the seed removed 
(more maynified), seen on its ventral face ; it is entire and chartaceous, as in Zizyphus, and, 
like it, has a small basal foraminal chink. Fiy. 13, a longitudinal section of the same 
across the shorter diameter, showing the smaller enclosed nucleus, from which it is quite 
free aU round ; this nucleus is seen edgeways, with the peripheral line of raphe proceeding 
from the base and crossing the chalazal apex : the integument containing this raphe is 
therefore the true testa, although membranaceous ; and the chartaceous covering appears to 
be another arillus, similar in its nature and origin to the crustaceous tunic of the seed in 
Rhamnus. My. 14, a longitudinal section of the same across the broader diameter, 
exhibiting the same parts ; here the completely peripheral cord of the raphe is seen 
crossing over the chalaza. Fiy. 15, a transverse section of the same, showing the same 
parts. Fiy. 16, the embryo, extracted from the albumen. Fiy. 17> the same, seen on its 
edge: all equally maynijied. Fiy. 18, an ovule before impregnation, seated in its cup- 
shaped fleshy support, from the growth of which, the outer lax or second arillus probably 
originates. Fiy. 19, a longitudinal section of the same fleshy support, with the un- 
impregnated o\^e seated on its funicle, previous to the development of the principal 
arillus or chartaceous integument. 
Plate 34. — A.. Colletia spinosa. 
Fii;. 1, flower before and after expansion. F/jr. 2, flower cut open : both nat. size. My. 3, 
calyx, maynijied, showing its annular perigynous disk, and the stamens seated between 
the teeth, as well as its pistil. Fiy. 4, stamens before and after dehiscence, seen in dif- 
ferent positions, more maynijied. 
B. Colletia inteicata. 
Fiy. 1, a flower, nat. size. Fiy. 2, the same, maynijied. Fiy. 3, the same cut open. 
Fiy. 4, the stamens before and after dehiscence, seen in different positions ; all maynijied. 
C. Colletia fekox. 
Fiy. 1, a flower, nat. size. Fiy. 2, the same cut open, maynijied. 
D. Colletia atrox. 
Fiy. 1, a flower, nat. size, 
maynijied. 
Fiy. 2, the same, maynijied. 
'E. Colletia ceuciata. 
Fiy. 3, the same cut open, also 
Fiy. 1, a flower, nat. size. Fiy. 2, the same cut open, maynijied. Fiy. 3, the stamens 
before and after dehiscence, seen in different positions, more maynijied. 
F. Colletia Weddelliana. 
Fiy. 1, a flower, nat. size. Fiy. 2, the calyx fallen away from its basal portion and cut 
open. Fiy. 3, the pistil, enclosed in the circumscissed cup of the calyx : both maynijied. 
Plate 35. — A. Colletia Kunthlana. 
A portion of a branch, nat. size. 
