PRIORITY OF PLANT NAMES 151 



valid older one. Vinca rosea Linn, was first taken out of the genus 

 and made the type of a new one by Reichenbach' under Lochnera. 

 There was, however, an older Lochneria Scopoli." In 1833 S. Don 

 founded the genus Caiharanthns^ with Vincra rosea Linn, and 

 Vinca pusilla Linn. The former is mentioned first by Don and is 

 therefore to be taken as type should there be any question of 

 ambiguity as to successive segregation.'* 

 Catharanthus S. Don ]. c. 



" Vinca species Linn." 1. c. 



Lochnera Reichb. 1. c. (1828) not Lochneria Scopoli (1777) 1. c. 



Ammocallis Small (1903), (1913) 1. c. 

 Catharanthus roseus G. Don. 1. c. 



Lochnera rosea Reichb. 1. c. 



Ammocallis rosea Small 1. c. p. 936. 



Vinca rosea Linn. Syst. Kd. x. p. 944, (1758). 



NEZRRA. 



Rafinesque's genus Nezera^ is evidently based on the Linum 

 striatum of Walter. Dr. Small^ accepts Reichenbach's'' later name 

 Cathartolinum based on the type Linum Catharticum Linn. As 

 long as the two types are retained in the same group segregate, 

 we would expect that the older name be taken up as dictated by 

 the rules of priority. Following is the diagnosis of Rafinesque, 

 given here so that those to whom this author's work is not readily 

 accessible, may use their own judgment as to the practical identity 

 of Nezera and Cathartolinum, as far as our American species are 

 concerned. 



"899 Nezera Raf. differs from Linum, calix with 5 segments 

 unequal in size or shape, stamens equal to the calix, anthers oblong, 

 styles 5 (p. 65) very long stigmas thick oblong capsule 5 locular. — 



1 Reichenbach, H. G. L., Consp. Reg. Veg. p. 134, (1828). 



2 Scopoli, J. A. Introd. p. 271, (1777). 



3 Don. G., Gen. Hist. Dichl. PI. iv., p. 95, (1838). 



4 The Kew Index gives the date 1836 for Don's work, but volume 4 of 

 the History has 1838 on the title page. The name Lochnera Reichb. was taken 

 up by E. Spach, Hist. Nat. Veg. VIII., p. 526, (i 39), having Vinca rosea 

 Linn, as type. 



5 Rafinesque, C. S., New. Fl. N. Am. II., p. 64, seg. (1836). 



6 Small, J. K., Fl. S. E. U. S. 2nd ed. p. 662, (1913) also N. Am. Fl. 

 25, p. 71. Britton N. L., 111. Fl. II., p. 436, (1913). 



7 Reichenbach, H. G. L., Handb. p. 306, (1837). 



