140 SOME OF WORLD'S BOTANISTS. 



Candollb, Alphonse Louis Pieree Pyramus, his 

 son, under the title "Prodromus Systematis Regni 

 Vegetabilis, etc." He was bom in Paris, October 27, 

 1806. Besides the continuation of the work begun by 

 his father, mentioned above, he wrote "Geographie 

 botanique raisonnee" (2 vols.), "Origin of Cultivated 

 Plants," etc. 



Celsius, Olap. Bom July 19, 1670 ; died at Up- 

 sala, Sweden, June 24, 1756. A Swedish botanist and 

 theologian; instructor of Linnaeus, who first discov- 

 ered his genius and was his patron. Noted for his re- 

 searches in regard to plants mentioned in the Bible. 

 In this work Linnaus assisted him for a time. 



CoNSTANTiN, JuLiEN. Parfs. Professeur au Mu- 

 s6um d'Histoire Naturelle et a I'Ecole Nationale 

 d 'Horticulture. Author of "Atlas des Orchidees cul- 

 tivees." 



DioscORiDES, a medical and botanical writer of the 

 first or second century A. D., supposed to be a native 

 of Anazarbus in Cilicia. He traveled through Greece, 

 Asia Minor, Italy, and Gaul, making investigations 

 and collecting plants. He wrote a work on Materia 

 Medica in five volumes, which has been translated 

 from the Greek and Latin into several modem lan- 

 guages. The botanical family Dioscoreacese (the 

 wild yam) is named in his honor. 



Engler, Adolf. Bom at Sagan, Silesia, March 

 25, 1844. A noted German botanist. He is director 

 of the Botanical Garden from 1889, and professor in 

 the University of Berlin. Among his productions is 

 "An Essay on the Development of the Vegetable 



