198 DEVELOPMENT OF THE OVULUM 
to be the young albumen. This goes on increasing, filling the 
whole ovule, and reducing the testa to a thin coating. 
a. Just before expansion. 
b. b. b. Expansion. 
c. After expansion. 
d. Sometime after expansion. 
e. Corolla one-half the lengthof calyx seen under pressure. 
f. Corolla two-thirds of the length of the calyx. 
Suddyah : July 2nd, 1836. 
PLATE Lv.—Q.* 
_ Shows the passage of the boyaux along part of the upper 
portion of the placenta, and their passage to the ovula. 
I. 3. At fecundation. 
4. Shortly after fecundation. 
5. Long section half-ripe. 
6. Commencement of embryo. 
7. Nearly ripe. 
ARUM orizense—PLATE L. 
In this species the nucleus is surrounded by a single tegu- 
ment to which it adheres firmly, except by its attenuated 
neck. This neck projects to a short distance beyond the 
foramen in an early stage : but at the time of dehiscence of the 
anthers, it is shorter than the neck of the testa ; the stigmatic 
tissue is broad above, attenuate inferiorly, and a communica- 
tion with the ovule is kept up by a conical process, hollow 
inside, and there occupied by stigmatic tissue, which hangs 
down as it were from the apex of the ovary, and reaches to 
a level with the foramen. At an early period there are traces 
of the-excavation of the nucleus, indicated by the grumous 
dense tissue, this is especially visible in the neck. At the 
time of expansion of the spath, this excavation is of con- 
* Name omitted in orig., probably an Asclepias. 

