THE GENERIC NAME SCIIIZONOTUS 251 



lively published In 1830. This fact was pointed out in 1908 by 

 Rydfoerg, who accepted Schizonotus Lindl. (1830) in place of Basilima 

 (1836) and adopted Sericotheca Rafin. as a prior name for Holodiscus. 

 It may be mentioned that Rafinesque himself gave the date of publi- 

 cation of Basilima as 1815, but this has not been confirmed. 



Before Scliizonotus Kafin. and Scliizonotus Lindl. had been re- 

 vived, Asa Gray applied the name Scliizonotus to a new genus of 

 AsclepiadacecB, segregated from Gomphocarpus. It will be seen 

 from the synonymy given above that Scliizonotus has been used by 

 Greene, Kuntze, and Render (1891-1902) in the sense of Holodiscus ; 

 by Rydberg and Britton (1908-1913) in place of Sorbaria ; and by 

 Asa Gray. 8. Watson, and Schumann (1876-1895) for an asclepia- 

 daceous genus which was re-named Solanoa by Greene in 1890. The 

 name Scliizonotus has thus become ambiguous and it therefore seems 

 desirable to abandon its use. 



According to a strict interpretation of the International Rules, 

 the names Sorbaria A. Br., Holodiscus Maxim., and Scliizonotus 

 A. Gray should be adopted for the three genera in question ; it can 

 hardly be doubted, however, that the retention of Scliizonotus 

 A. Gray, would lead to confusion ; and Jepson, who followed the 

 International Rules in other respects, accordingly used the name 

 Solanoa Greene, in preference. This is in harmony with one of the 

 principles on which the Rules are founded : to reject the use of names 

 which may cause error or ambiguity (Art. 4). According to the 

 American Code, the three genera should bear the names Schizonofus 

 Lindl., Sericotheca Rafin., and Solanoa Greene respectively. The 

 species published under Scliizonotus may be assigned to Sorbaria, 

 Holodiscus, and Solanoa as follows : 



Scliizonotus Aitchlsoni Skeels in U.S. Dept. Agric. Bur. PI. Ind., 

 Bull. 242, 38, n. 30758 (1912) = Sorbaria Aitchisoni Hemsl. 



Scliizonotus araenteus Kuntze, Rev. Gen. pars l, 225 (1891) = 

 Holodiscus argejxteus Maxim. 



Scliizonotus arlcefollus Greene, Fl. Francisc. 58 (1891)=Holo- 

 djscus discolor Maxim. 



Schizonotns discolor Rafin. New Fl. iii. 75 (1836) = Holodiscus 

 discolor Maxim. 



Scliizonotus dumosns Koehne, Deutsche Dendrol. 265 (1893) = 

 Holodiscus dumosis A. A. Heller. 



Scliizonotvs Llndleijanus Wall, ex Steud. Nomencl. ed. 2, ii. 531 

 (1841) = Sorbaria Lindleyana Maxim. 



Scliizonotus jyurptirascens A. Gray in Proc. Am. Acad. xii. QQ 

 (1876) = Solanoa purpurascens Greene. 



Schizonotns sorbifolius Lindl. ex Steud. Nomencl. ed. 2, ii. 531 

 (1841) = Sorbaria sorbifolia A. Br. 



Schlzonotus tomentosus Lindl. Bot. Reg. xxvi. Misc. Not. 71 

 (1840) = Sorbaria Lindleyana Maxim. 



