326 POSITION OF THE OVULES. 
b. Position.—The position of the ovules with regard to the 
cavity or cell in which they are placed is also liable to vary. 
Thus when there is but one ovule, this may arise at the bottom 
HIG. fale 
Fig. 731. Vertical section of the fruit 
of a species of Rumex ( Polygonacece). 
p. Enlarged calyx surrounding the 
fruit. The fruit contains a single 
erect orthotropous seed. The posi- 
tion of the ovule in the ovary is 
also described as erect and ortho- 
tropous. The embryo is inverted 
or antitropous. 
of the ovary or cell and be directed 
towards the summit, as in Com- 
posite and Polygonaceze (fig. 
731), when it is said to be erect ; 
or it may be inserted at the sum- 
mit of the ovary and be turned 
downwards, as in Hippuris (fig. 
732), in which case it 1s inverse or 
pendulous ; or if it is attached a 
little above the base, and directed 
obliquely upwards, as in Parie- 
taria (fig. 733), it is ascending ; or 
if, on the contrary, it arises a 
little below the summit, and is 
directed obliquely downwards, as 
in the Mezereon (fig. 734) and 
Apricot, it is suspended; or if 
from the side of the ovary, with- 
out turning upwards or down- 
wards, as in Crassula, it is hori- 
zontal or peltate. In some plants, as in Armeria (fig. 637), the 
ovule is suspended from the end of a long funiculus arising 
ihieeyeye Fic. 7333 
Fig. 732. Vertical section of the ovary of the Mare’s Tail (Hippuris vul- 
garis). oO. Ovule, which is inverse or pendulous, and anatropous. s. Base 
of the style. f. Funiculus. 7. Raphe. ec. Chalaza.—Fig. 733. Vertical 
section of the ovary of the Pellitory (Pavietaria officinalis), with a single 
ascending ovyule. The letters have the same references as in the last figure. 
Fig. 734. Vertical section of the ovary of the Mezereon (Daphne Meze- 
reum), containing a solitary suspended ovule. The letters refer as before. 
From Jussieu.— Fig. 735. Vertical section of a cell of the ovary of a spe- 
cies of @sculus containing two ovules, 0, 0, one of which is ascending and 
the other suspended. mm, m. The micropyle or foramen in the two ovules. 
s. Base of the style. From Jussieu. 
from the base of the ovary; such an ovule is frequently termed. 
reclinate. 
