The Ovule of the Bruniacese. 
31 
LITEEATUEE CITED. 
Citations of papers not available to the writer have purposely been omitted. The more 
important are given in Coulter and Chamberlain's " Morphology of Angiosperms," 
1903. 
1. Bentham, G., and Hooker, J. D., " Genera plantanim." London. 
1842. 
2. Saxton, W. T., "On the Development of the Ovule and Embryo-sac 
in Cassia tomentosa, Lamk." Trans. S. A. Phil. Soc., 18 : 1-5, pis. 1, 2, 
1907. 
3. ScHONLAND, S., "A Study of some Facts and Theories bearing upon 
the Question of the Origin of the Angiospermous Flora of South Africa.'* 
Trans. S. A. Phil. Soc., 18 : 321-367. 1907. 
EXPLANATION OF FIGUEES. 
Sections were cut with a rocking microtome, and drawings made with a Zeiss 
microscope, lenses, and camera lucida. Except Figs. 1 and 2 the drawings are made 
from more than one section of a series. They are, however, accurately drawn 
to scale. In all : A = Antipodals. E = Embryo-sac. I = Integument. M = Micro- 
pyle. 0 = Oosphere. Ov = Ovule. P = Polar nuclei. S = Style, St = Starch grains. 
Sy = Synergids. T = Tannin (?) containing cells. V = Vascular bundle. 
FIG. 
la. Megaspore mother cell dividing Staavia glutinosa, Thunb. x 270. 
lb. Spindle of Fig. la. x 1000. 
2. Eow of 4 megaspores in nucellus and a few cells of the integument. 
Audouinia capitata, Brongn. x 360. 
3. Ovule with bi-nucleate embryo-sac. Audouinia capitata, Brongn. 
X 90. 
4. Mature ovule of Berzelia languinosa, Brongn. x 75. 
5. Mature ovule of Staavia glutinosa, Thunb. x 40. 
6. Diagrammatic longitudinal section of the ovary of Brunia 7iodiflora^ 
Linn, x 17. 
7. Mature ovule of Brunia nodiflora, Linn, x 75. 
8. Embryo-sac of Brunia nodiflora, Linn, x 155. 
