315] FLORA OF BOULDER, COLORADO 1 67 



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. Mil. Maple family 



276. ACER L. Maple. 



681. A. glabmm 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. 



681a. A. glabrum tripartitum (Nutt.) Pax [A. tripartitum 

 Nutt.]. Three-leaved maple. 

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

 Range of the type. 



