204 SOUTH AFRICAN BOTANY 
(b) The leaf of Oxalis. State what you know of its sleep 
movements. 
(c) The gynoecium of Pisum. Sketch the whole gynoecium 
from the side and the ovary in cross section. 
(d) The androecium of Hibiscus. Sketch it as seen when 
the flower is cut in longitudinal section. 
(e) Leaf of Acacia. Sketch it. 
(7) Gynoecium of Cotyledon (or of Kalanchoe). 
Sketch a single carpel from the side and its ovary in cross 
section. 
(g) The corolla of Sonchus. Make sketches, 
12, Write an account of the floral structure and methods of 
pollination met with in N. O. Labiatae. 
13, Point out the variations in structure and position of 
the ovary in the various genera of Rosaceae, and show why 
they are all assigned to the same order. 
14, Name two genera belonging to the order Leguminosae, 
and explain how, given a plant belonging to one of them, you 
would 
(a) recognize it as belonging to this order ; 
(b) find out in which of the two genera it should be placed. 
15. Name a genus belonging to either Ericaceae or 
Solanaceae. Select a plant belonging to the genus and describe 
its general habit, leaf, and fruit. Draw floral diagams in ground 
plan and vertical section to show structure of flower. 
16. Note any points of interest in the following flowers: 
Salvia, Sunflower, Oxalis, Gorse, Cornflower, Daffodil. 
17. Arrange the following natural orders under their classes 
and sub-classes: Liliaceae, Proteaceae, Compositae, Crassu- 
laceae, Malvaceae. Give in a few words the reasons for assign- 
ing them to their places. 
18, What are the principal characters of the N. O. Gerani- 
aceae? Mention the more important 8S. African genera. 
19. Give an account of the more important characters of 
the N. O.’s Iridaceae, and Liliaceae, and state what you con- 
sider to be the principal differences between them. 
20. Give an account of the gynoecium in Crassulaceae, 
Cruciferae, Compositae, Leguminosae, Malvaceae, and state 
what kinds of fruits are found in these orders, 
