168 



While some Palms, as indicated, descend to cooler latitudes? 

 others ascend to temperate and even cold mountain regions. 

 Among the American species are prominent in this respect : 

 Euterpe andicola, Brogn., E. Haenkeana, Brogn., E. longi- 

 vaginata, Mart., Diplothemium Porallyi, Mart, and Ceroocylon 

 pithy ropliyllum, Mart., all occurring on the Bolivian Andes 

 at an elevation of about 8000 feet. Oeroxylon a?idicola, 

 Humb., Kunthia montana, Humb., Oreodoxa frigida, Humb., 

 and Geonoma densa] Linden, reach also on the Andes of 

 New Granada a height of at least 8000 feet. Ceroxylon 

 Klopstoclcia, Mart., advances on the Andes of Venezeula to 

 a zone 7500 feet altitude, where Karsten saw stems 200 feet 

 high with leaves 24 feet long ! There also occur fAyagrus 

 Sancona, Karst. and Platenia Chiragua, Karst. at elevations 

 of 5000 feet, both very lofty Palms. From the temperate 

 mountain regions of sub-tropical Mexico are known among 

 others : Chamaedora concolor, Mart., Copernicia Pumos, 

 Humb., C. nana, Kunth, and Braliea dulcis, Mart., at eleva- 

 tions from 7000 feet to 8000 feet. 



Xanthorrhiza apiifolia, 1'Herit. 



North America. A perennial almost shrubby plant of 

 medicinal value. The root produces a yellow pigment, 

 similar to that of Hydrastis Canadensis, L. Both contain 

 also Berberin. 



Ximenia Americana, L. 



Tropical Asia, Africa and America, passing however the 

 tropics in Queensland, and gaining also an indigenous 

 position in Florida. This bush may therefore accom- 

 modate itself to our clime in localities free of frost. 

 The fruits are edible, resembling yellow plums in ap- 

 pearance ; their taste is agreeable. The wood is scented. 



Yucca filament osa, L. 



The Adam's Needle. From Carolina and Florida to Texas 

 and Mexico. An almost stemless species. It would hardly 

 be right, to omit here the plants of this genus altogether, as 



