56 Rydberg : Rocky Mountain flora 



Rulac Nuttallii Nieuwl. Am. Midi. Nat. 2: 137. 1911. 



Distribution: From Michigan and Ohio (?) to Kansas, 

 Colorado and Montana. 



4. Negundo texanum (Pax) Rydb. 



Acer Negundo texanum Pax; Bot. Jahrb. 7: 212. 1886. 

 Acer californicum texanum Pax; Bot. Jahrb. 11: 75. 1889. 

 Rulac texana Small, Fl. SE. U. S. 743. 1903. 

 Distribution: Texas and Oklahoma. 



5. Negundo interius (Britton) Rydb. 



Rulac texana Small, Fl. SE. U. S. 743, in part. 1903. Not Acer 



texanum Pax. 1886. 

 Acer interior Britton, N. Am. Trees 655. 1908. 



Distribution: From Saskatchewan and Manitoba to Ne- 

 braska, New Mexico, Arizona and Montana. Nieuwland gives 

 Negundo Fraxinus Bourgeau* as a synonym under this. At the 

 place referred to Bourgeau enumerates a number of genera col- 

 lected on May 6. Evidently a comma is omitted between Negundo 

 and Fraxinus. 



6. Negundo Kingii (Britton) Rydb. 



Acer Kingii Britton, N. Am. Trees 656. 1908. 

 Rulac Kingii Nieuwl. Am. Midi. Nat. 2: 139. 191 1. 

 Distribution: Utah and Arizona. 



7. Negundo californicum T. &. G. Fl. N. Am. 1: 250. 1838 



Acer californicum Dietr. Syn. 2: 1283. 1840. 



Rulac calif ornica Nieuwl. Am. Midi. Nat. 2: 139. 191 1. 



Distribution: California and according to Nieuwland extend- 

 ing into northern Mexico. 



8. Negundo mexicanum DC. Prod. 1: 546. 1824 



Acer mexicanum Pax; Bot. Jahrb. 7: 212. 1886. Not Acer mexi- 

 canum A. Gray. 1861. 



Rulac mexicana Nieuwl. Am. Midi. Nat. 2: 140. 191 1. 

 Distribution: Southern Mexico to Guatemala. 



* Journ. Linn. Soc. 4: 9. 1859. 



