42 



VARIOUS FOOD-PLANTS 



Fig. 31. — Almond (Prunufs j{>nyodalus. Rose Family, Rosacea;). A, twig 

 bearing one unopened winter-bud and a cluster of j-oung leaves ex- 

 panding from another. B, a flowering branch. C, a single flower. 

 D, the same cut vertically to show the single jiistil with its small ovary at 

 the base of an urn-like continuation of the flower-stalk at the rim of 

 which are borne three sets of organs, namely: the stamens which are 

 numerous and in two rows; then outside of these a single row of deli- 

 cate enveloping organs, the petals, '^ which in the almond flower are 



* We have here an example of a "complete" flower or one which has all 

 the kinds of organs which are commonly present; that is to say, besides the 



