[13] 



Fruits. 



98 



FLOWERING PLANTS 



I. SWEET PEA (Lathyrus odoratus) (Papilionatcz}. 



Sketch the young fruit (pod) shewing the remains of the stigma and the persistent calyx. Split it longitudinally 

 and draw the young seeds attached to one ridge of the fruit wall. Compare it with your drawing of the flower 

 of Cytisus. In the older pod draw the row of nearly ripe seeds. 



II. CHERRY (Prnnus cerasus) (Rosacece). 



A. Sketch a flower cut open longitudinally, shewing the receptacle and the arrangement and manner of 

 attachment of (a) the sepals, (b) petals, (c) numerous stamens, (d) single carpel. 



B. Cut a longitudinal section of a very young Cherry fruit. Observe the pericarp (fruit wall) consisting 

 of epicarp (skin), mesocarp (flesh) and the thickening endocarp (stone) ; also the testa and endosperm and embryo 

 of the young seed (kernel). 



C. Sketch a ripe Cherry fruit shewing the scar of the style and the longitudinal groove representing the suture 

 (joined margins) of the carpel. Remove the stalk and notice on it the scar of the attachment of the receptacle-tube. 



D. Break the stone and examine the ' kernel ' or seed containing the resting embryo. 



A 



