No. 557] PARTHENOGENESIS IN NICOTIAN A 281 



Among the early observers of parthenogenetic 2 qualities 

 in plants are given Spallanzani (1767-1779), Henschel 

 (1817-1818), Lecoq (1827), Girou de Buzareinques 

 (1827-1833), Ramisch (1833-1838), Bernhardi (1834- 

 1839), Tenore (1854), Gasparini (1846) and Naudin 

 (1856). As a few of the plants cited by these authors are 

 at the present time the object of research, Blaringhem 

 gives a list of the observed plants with an indication of 

 the more doubtful. 



The list is given as follows : 



(a) Plantes Dioiques. 



Bryonia dio'ica d'apres Naudin (confirme en 1904 

 par Bitter), 



Cannabis sativa d'apres Camerarius, Spallanzani, 

 Henschel, Girou de Buzareinques, Berhardi et 

 Naudin, 



Datisca cannabina d'apres Wenderoth et Fresen- 

 ius (tres douteux), 



Lychnis dio'ica d'apres Henschel et Girou de Buz- 

 areinques, 



Mercurial is annua d'apres Lecoq, Ramisch, Nau- 

 din et Thuret, 

 Pistacia narbojicnsis d'apres Bocconi et Tenore, 

 Spinacia oleracca d'apres Spallanzani, Lecoq et 

 Girou de Buzareinques. 



(b) Plantes Monoiques. 



Cucurbit a Melopcpn, C. Citrullus et autres especes 



d'apres Spallanzani, Sageret et Henschel, 

 Ficus Carica d'apres Gasparini, 

 Urtica pilulifera d'apres Henschel (tres douteux). 



"Winkler, in his introduction, cites Calcbofiync iHcifolia 

 J. Smith, a dicecius member of the Euphorbiaceae native 

 to eastern Australia, which had been cultivated since 

 1829 at Kew in three "weiblichen Stocken," as the first 

 mentioned case of seed production without the assistance 



