Pojark.: Antonina Ivanovna Pojarkova, 

 1897-1980, Russia 



Reveal: James Lauritz Reveal, 

 1941- , United States 



Pollard: Charles Louis Pollard, 

 1872-1945, United States 



Rich., A.: Achille Richard, 

 1794-1852, France 



Pourr.: Pierre Andre Pourret, 

 1754-1818, France 



Rich., L.C.: Louis Claude Marie Richard, 

 1754-1821, France 



Prain: David Prain, 

 1857-1944, United Kingdom 



Riv., A.: Marie Auguste Riviere, 

 1821-1877, France (bamboo) 



Presl: Karel Boriwag Presl, 

 1794-1852, Czechoslovakia 



Riv., C: Charles Marie Riviere, 

 1845-?, France (bamboo) 



Presl, J.: Jan Svatopluk Presl, 

 1791-1849, Czechoslovakia 



Rivers: Thomas Rivers, 



1798-1877, United Kingdom (nurseryman) 



Pritz.: Ernst Georg Pritzel, 

 1875-1946, Germany 



Robinson: Benjamin Lincoln Robinson, 

 1864-1935, United States 



Purk.: Emanuel von Purkyne, 

 1832-1882, Czechoslovakia 



Robs., N.: Norman K. B. Robson, 

 1928- , United Kingdom (Hypericum) 



Pursh: Frederick Traugott Pursh, 

 1774-1820, Germany, United States 



Roberts: A.V. Roberts, 

 United Kingdom 



Raber: Oran Lee Raber, 

 1893-1940, United States 



Roem.: Johann Jacob Roemer, 

 1763-1819, Germany 



Raddi: Giuseppe Raddi, 

 1770-1829, Italy 



Raeusch.: Ernst Adolf Raeuschel, 

 fl. 1772-1797, Germany 



Raf.: Constantine Samuel Rafinesque, 

 1783-1840, United States 



Roem., M.J.: Max J. Roemer, 

 1791-1849, Germany 



Rolfe: Robert Allen Rolfe, 

 1855-1921, United Kingdom 



Rose: Joseph Nelson Rose, 

 1862-1928. United States 



Rayner: Douglas A. Rayner, 

 1949- , United States 



Roth: Albrecht Wilhelm Roth, 

 1757-1834, Germany 



Reade: John Moore Reade, 

 1876-1937, Canada, United States 



Rottl.: Johann Peter Rottler, 

 1749-1836, France, India 



Regel: Eduard August von Regel, 

 1815-1892, Germany, Russia 



Rouleau: Joseph Albert Ernest Rouleau, 

 1916-1991, Canada 



Rehd.: Alfred Rehder, 



1863-1949, Germany, United States (dendrology) 



Rowlee: Willard Winfield Rowlee, 

 1861-1923, United States 



Reichenb.: Heinrich Gottlieb Ludwig 



Reichenbach, 



1793-1879, Germany 



Retz.: Anders Jahan Retzius, 

 1742-1821, Sweden 



Rowley: Gordon Douglas Rowley, 

 1921- , United Kingdom 



Roxb.: William Roxburgh, 

 1751-1815, United Kingdom, India 



231 



