I50 AMERICAN MIDLAND NATURALIST 



"pinched" at the base or distinctly constricted below into a stipe- 

 like base, and in A^. interius and N. NuUallii not at all constricted 

 below. The two trees I have under observation both have the fruit 

 not at all "pinched" at the base or constricted into a stipe-like here. 



Dr. Rydberg and Dr. Nicuwland agree that A^. NuUallii has 

 leaflets with tufts of hairs in the axils of the veins, and that N. 

 Negundo has leaflets glabrous or nearly so at maturity. The tree 

 I am calling N . Nuttallii has these tufts of hairs in the axils of the 

 veins, but the one I take to be A^ interius has not this character. 



Dr. Nieuwland' says that in A'^. Negundo the secondary veins 

 and mesophyl of the leaflets are not conspicuous, and the leaves 

 are thin and membranous.^ The tree I take to be A'^. Nuttallii 

 has the secondary veins and mesophyl of the leaflets conspicuous 

 and the leaflets are thick and very veiny. 



According to Dr. Nieuwland^, A^. Negundo seems almost 

 totally absent from the Middle West, but I have seen trees I 

 take to be A'^. Negundo in Southern Kansas, vSouthwestern Missouri 

 and Northern Arkansas. That the preponderance of evidence is 

 in favor of the tree I am calling A^. Nuttallii being that species, is, 

 that Nuttall was here at Courtney, Missouri at the beginning of 

 the 19th century, and he gives as the range of his Negundo fraxini- 

 Jolium, "Northwestward on the banks of the Missouri to the 

 Mountains." The tree I am calling A", interius can not be N. 

 Negundo for the reason that it has densely velvety-pubescent 

 twigs, thick rugose leaflets, secondary veins and mesophyl prom- 

 inent and whitish, fruit not "pinched" at base, wings of fruits 

 scarcely not at all decurrent on fruit body, and leaves frequently 

 bipinnate. 



Courtney, Missouri. 



Notes on Prior ty of Plant Names. 



BY J. A. NIEUWLAND. 



CATHARANTHUS. 



It is difficult to see why the new name Ammocallis* was used 

 for a segregate genus from Vinca, when there was at least one 



1 Nieuwlancl, 1. c. p. 136. 



2 Nieuwland, 1. c. p. 136. 3 Nicuwland, 1. c. p. 138. 

 4 Small, J. K., Fl. SE. U. S. p. 935, (1903) also 2nd Ed. (1913). 



