ANGIOSPERM^, DICOTYLEDONES. 



789 



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

 in Umbelliferse and AraliacesB (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. 



* Heracleum Sphondylium (Family Umbelliferse), iiowering plant. 2 Single flower, s Fruit. * Longitudinal section through 

 the iiower of Eryngium mariti'mwm (Family Umbelliferse). 5 Hydroeotyle vulgaris (Family Umbelliferse), entire plant, 

 fi Cornus mas (Family Cornacese), inflorescence, f Longitudinal section through a flower. ^ Fruit. 1 reduced ; 2, s, 4^ s^ e^ 7, 

 and « magnified. (After Baillon.) 



also represented by a number o£ species in the Tropics. Several of the Umbelliferse 

 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 



