98 ELEMENTARY BOTANY 
carpel of the gynecium becomes subdivided into two chambers, 
each containing one ovule. The carpels unite in the lateral 
plane ; this is clear from the situation of the two stigmas in 
the median plane. The style arises — 
from the base of the gynecium, 
and is therefore described as gyno- 
basic. 
Fruit : 4 achenes. 
The nectary is at 
the base of the ovary, 
which lies at the bottom of the 
corolla tube; this tube is long, so 
that the honey can be reached 
only by large bees. The bee alights 
on the lower lip, which is large 
and conspicuous, thrusts its head 
Fic. 129.—Mepran Ver- into the mouth of the corolla 
ee or DEAD tube, its back being pressed against 
the upper lip, where the anthers are. 
The stigma fies at the mouth of the corolla tube directly in 
the bee’s path, so that it gets pollinated before the bee has 
had time to get any fresh pollen from the flower. 
; This Order is easily 
Labiate com- ,. .. : 
pared with ‘istinguished from all 
Scrophulari- others. Some of the 
aceR. 
Pollination. 

Scrophulariaces —_ re- 
semble Dead Nettle in having 
- plants with square stems, opposite 
leaves and bilabiate corollas; but 
the gynecium of the Scrophu- 
lariace has invariably a twocelled, = 
not a four-celled, ovary; and the 4 430. _Fyorat Dra. 
fruit is a capsule, never four achenes, _ @kAM OF Dap Nervte. 
as in this Order. | | 
It is true that the gynecium of the Labiate is exactly 
similar to that of the Boraginacex, but this latter Order differs 
In having regular flowers and alternate leaves. 

