315] FLORA OF BOULDER, COLORADO 167 



Order 26. SAPINDALES. 

 Family 67. SPONDIACEAE Kunth. Cashew family. 



273. TOXICODENDRON Miller. POISON IVY. 



678. T. Rydbergii (Small) Greene [Rhus Rydbergii Small]. 

 RYDBERG'S POISON IVY. 



Common along streams, roadsides, gulches, and canons for 

 some distance in the mountainous region, 5100-7000 (Bear 

 Canon) ft. (Daniels, 42). 



MONTANA to BRITISH COLUMBIA; NEBRASKA to COLORADO. 



274. RHTJS L. SUMACH. 



679. R. glabra cismontana (Greene) Cockerell. Nov. comb. 

 [R. cismontana Greene] . CISMONTANE SUMACH. 



Common on the mesas and foothills, 5400-8000 ft. (Daniels. 

 221). Magnificently scarlet in the fall. 



DAKOTA and UTAH to NEW MEXICO and ARIZONA. 



275. SCHMALTZIA Desv. FRAGRANT SUMAC. 



680. S. trilobata (Nutt.) Small [Rhus trilobata Nutt.]. 

 THREE-LOBED FRAGRANT SUMAC. 



On the dry banks of streams, and on dry hills and ridges, 

 5400-8000 ft. (Daniels, 599). 



ASSINIBOIA to WASHINGTON; MISSOURI to TEXAS, CALIFOR- 

 NIA, and MEXICO. 



Family 68. ACERACEAE J. St. Hil. Maple family 



276. ACER L. MAPLE. 



68 1. A. glabnim Torr. SMOOTH MAPLE. 



In gulches and canons and along streams, 5400-8600 ft. (Dan- 

 iels, 96). Also in the mountains between Sunshine and Ward, 

 and from Eldora to Baltimore (Rydberg). 



NEBRASKA to WYOMING; NEW MEXICO to UTAH. 



68ia. A. glabrum tripartitum (Nutt.) Pax [A. tripartitum 



Nutt.]. THREE-LEAVED MAPLE. 



Along Boulder Canon road, 6000-7000 ft. (Daniels, 285). 

 Range of the type. 



