VARIOUS FOOD-PLANTS 



97 



Fig. 106. — Orange (Citrus Aurantium) and I/emon (C. mcdicn, var. Limonum, 

 Rue P^amily, Rutaccw). A-F, Orange. .1, flowering branch. B, 

 flower, central part, cut vertically and enlarged. C, pollen grains, 

 much magnified. D, ovary, cut across. E, seed, cut vertically. F, 

 seed, cut across. G-L, Lemon. G, flowering branch. H, flower, with 

 petals removed, enlarged. J, anther, front view. K, same, back view. 

 L. ovarj% cut vertically, enlarged. (Berg and Schmidt.) — Both plants 

 are small trees or shrubs with evergreen aromatic leaves and smooth 

 stems; flowers white in the orange, and tinged with pink in the lemon; 

 fruit with thick aromatic rind, and seeds imbedded in a pulp consisting 

 of internal hairs swollen with a more or less acid juice. 



