PLATE XIX. 
A is Mierembergia stricta. 
B is Nierembergia rigida. Fig. 1, a calyx; Fig. 2, 
a corolla; Fig. 3, a corolla cut open; Fig. 4, the stamens 
removed; Fig. 5, the pistil seen sideways and in front: al/ 
natural size. 
PLATE XX. 
A exhibits Nierembergia linifolia. Fig. 1, the corolla cut 
open; Fig. 2, the pistil, with the stamens removed and em- 
braced by the stigma; Fig. 3, the stamens; Fig. 4, the pistil 
with the stigma expanded: all nat. size. 
B shows Nierembergia anomala. Fig. 1, a flower: nat. 
size; Fig. 2, a flower cut open: magnified; Fig. 3, the pistil, 
showing the stigma embracing the stamens; Fig. 4, stamens 
seen in different positions before dehiscence: more highly 
magnified ; Fig. 5, the pistil separated, and seen in front and 
sideways : magnified. 
PLATE XXI. 
Shows Vestia lycioides. Fig. 1, @ flower; Fig. 2, the 
calyx; Fig. 3, the corolla cut open; Fig. 4, a section through 
the lobes of the corolla in bud, to show the mode of zstiva- 
tion: all nat. size; Fig. 5, an anther, before and after dehis- 
cence: magnified; Fig. 6, grains of pollen, highly magnified : 
