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94 



FLOWERING PLANTS 



Morphology of the Flower (continued). 

 CARPELS. 



A. Remove a carpel from the old flower or young fruit of Caltha (Marsh marigold), draw the side view and 

 then split down the ovary to shew the many ovules inside, attached in two rows along the inner edge, corre- 

 sponding with the joined margins of the carpellary leaf. 



B. Draw under a low power the transverse section of the ovary of Yucca provided, shewing the three joined 

 carpels, midrib and edges (placentae) of each, the ovules with (i) funicle and vascular bundle traversing it, (ii) inner 

 and outer coats, (iii) micropyle, (iv) nucellus, (v) embryo-sac. 



C. Draw under a low power a diagram of the transverse section of the carpel of Aquilegia (Columbine) shewing 

 (i) midrib of carpellary leaf, (ii) edges (placentae) to which ovules are attached, (iii) cavity of ovary, (iv) ovules. 



D. In the same section draw under the high power (a) the synergidae and the egg-cell, (b) the antipodal cells, 

 (c) the nucleus and vacuolated protoplasm of the embryo-sac, (d) the nucellus, (e) the coats of the ovule and if possible 

 indicate (/) the micropyle (very narrow and not traversed in most sections). 





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