ANGIOSPERM^, DICOTYLEDONES. 



789 



fig. 442^). The calyx, corolla, and androecium are 4-merous in Cornaceas, 5-merous 

 in Umbelliferae and Araliacese (see figs. 442 ^ and 442 ", and p. 289, fig. 283 *). 

 The Umbellales belong chiefly to the North Temperate Zone, but the Araliacese are 



Fig. 442.— Umbellales. 



1 Beradenw Sphondyliuyn (Family UrabelliferEe), flowering plant. 2 Single flower. 3 Fruit. * Longitudinal section through 

 the flower of JEryngium maritimum (Family Umbelliferse). 5 Hydrocotyle vulgaris (Family Umbellifera;), entire plant. 

 •> Cornus mas (Family Cornaceas), inflorescence. ? Longitudinal section through a flower. ^ Fruit. 1 reduced ; 2,3^ 4^ 5^ 6^ 7^ 

 and 8 magnified. (After Baillon.) 



also represented by a number of species in the Tropics. Several of the Umbellif erse 

 are natives of the arctic area of vegetation and of alpine regions. Gaya simplex 

 occurs in the Central Alps as high as 2600 metres above the sea-level. Fossil 

 remains, belonging chiefly to the families of Araliacese and Cornacese, have been 



