Paxt. Joseph Paxton, 1802-1865. England. 



P'ei (Chien P'ei). P'ei Chien, contemporary. China. 



Pennell. Francis Whittier Pennell, 1886-1952. Academy of Sciences, Philadelphia. U.S.A. 



Perk. Janet Russel Perkins, 1853-1933. U.S.A. 



Pers. Christian Hendrik Persoon, 1755-1837. Germany. 



Peterm. Wilhelm Ludwig Petermann, 1806-1855. Germany. 



Pilger. Robert Knud Friedrich Pilger, 1876-1953. Germany. 



Planch. Jules Emile Planchon, 1833-1900. Professor of Botany at Montpellier. France. 



Poir. Jean Louis Marie Poiret, 1755-1834. France. 



Porterfield. Willard Merrit Porterfield, Jr., 1893-. U.S.A. 



Praeger. Lloyd Praeger, 1865- . Dublin, Ireland. 



Prain. David Prain, 1857-1944. Great Britain. 



Prain & Burk. Prain & Burkill. 



Prantl. K. A. E. Prantl, 1849-1893. Germany. 



Presl. Karel Boriwog Presl, 1794-1852. Czechoslovakia. 



Pritz. Ernst Pritzel, 1875-. Germany. 



Proch., J. (J. Proch.). J. I. Prokhanov (Prochanov), contemporary. Russia. 



Pursh. Frederick Traugott Pursh, 1774-1820. Germany and U.S.A. 



Raddi. Giuseppe Raddi, 1770-1829. Italy. 



Raf. Constantino Samuel Rafinesque-Schmaltz, 1784-1842. U.S.A. 



Ram. Louis Francois Elisabeth Ramond de Carbonnieres, 1753-1827. France. 



Regel. Eduard von Regel, 1815-1892. Founder of "Gartenflora." Germany and Russia 



Regel & Maack. Eduard von Regel and Richard Maack. 



Rehd. Alfred Rehder, 1863-1949. Harvard University. U.S.A. 



Rehd. & Wilson. Alfred Rehder and Ernest Henry Wilson. 



Reichb. Heinrich Gottlieg Ludwig Reichenbach, 1793-1879. Germany. 



Reichb. f. Heinrich Gustav Reichenbach, the son, 1823-1889. Authority on orchids. 



Germany. 

 Reinw. Kaspar Georg Karl Reinwardt, 1773-1854. Professor of botany at Leyden. 



Holland. 

 Rendle. Alfred Barton Rendle, 1865-1938. Great Britain. 

 Retz. Andres Johan Retzius, 1742-1821. Sweden. 

 Rich. Louis Claude Marie Richard, 1754-1821. France. 

 Rich., A. (A. Rich.). Achille Richard, 1794-1852. France. 

 Ricker. Percy Leroy Ricker, 1878-. United States Department of Agriculture. 

 Ridley. Henry N. Ridley. Author of " Flora of the Malay Peninsula," 1922-1925. 



Great Britain. 

 Riv. Marie Auguste Riviere, 1821-1877; Charles Marie Riviere, 1845- . Nursery 



men. France. 

 Robins. Benjamin Lincoln Robinson, 1864-1935. Harvard University. U.S.A. 

 Roem. Johann Jacob Roemer, 1763-1819. Switzerland. 

 Roem. & Schult. (R. & S. Roemer and Schultes. 

 Rolfe. Robert Allen Rolfe, 1855-1921. Great Britain. 

 Roman. Frederic Romanet du Caillaud. France. 

 Roscoe. William Roscoe, 1753-1831. England. 

 Rosen. J. P. Rosen, at Upsala in 1821. Sweden. 

 Roth. Albrecht Wilhelm Roth, 1757-1834. Germany. 

 Rottb. Christen Fries Rottboell, 1727-1797. Denmark. 



549 



