a ERA NT ALES. 



541 



AHanthua glandulosus, the Tree of Heaven, a native of China, is com- 

 monly planted in the United States as a shade tree. Its wood is valu- 

 able in cabinet-making. 



Order Rutacese. The Rue Family. Shrubs and trees, rarely herbs, 

 with glandular-punctate heavy-scented foliage ; leaves generally com- 

 pound and alternate; stamens generally distinct. The order as here 

 considered includes 650 known species, widely distributed in tropical 



FIGS. 508-505. ILLUSTRATIONS or CITRUS AUHANTIUM. 



FIG. 504. Fio. 505. 



Fig. 502. -Section of flower. Magnified. 

 Fig. BOS. Part of androacium. Magnified. 

 Fig. 504. -Flower diagram. 

 Fig. 505. -Calyx and ovary. Magnified. 



and temperate climates. Seven tribes, most of which were former!/ 

 considered to be orders, are recognized by Bentham and Hooker. 



Tribe Aurantiece, with actinomorphic, monoclinous flowers, 

 baccate (berry-like) fruits, and seeds without endosperm. (Figs. 502-5.) 



Citrus Aurantium, the Sweet Orange, is an Indian tree, now grown 

 throughout all warm countries of the world for its well-known fruits. 



G. Limonum, the Lemon, is a native of Northern India, now widely 

 distributed. It was introduced into Europe during the Crusades. 



Other species of Citrus yield valuable fruits, as C. medtca, the Citron ; 

 C. Limetta, the Lime ; C. decumana, the Shaddock ; C. Bigaradia, the 

 Seville or Bitter Orange, etc., etc. 



The hard yellow wood of the Orange is valued for inlaying 



