31 l] FLORA OF BOULDER, COLORADO 163, 



Nova Scotia to British Columbia ; New York to Cali- 

 fornia. 



264. ERODIUM L. Stork's-bill. 



659. E. cicutarium (L.) L'Her. Hemlock stork's-bill. 

 Pin-clover. 



Boulder (Rydberg), where it is very common (Cockerell). 

 Europe, thence to North America. 



FamUy 63. LINACEAE Dumont. Flax family. 



265. LINTJM L. Flax. 



660. L. Lewisii Pursh [L. perenne Lewisii (Pursh) Eat. & 

 Wright]. Lewis's FLAX. 



Abundant on the plains, mesas, and open mountain slopes, 

 5100-8600 ft. (Daniels, 132). 



Mackenzie to Yukon ; Texas to California and Mexico. 



661. L. pratense (Norton) Small. Meadow flax. 

 Abundant in a meadow north of Boulder (Henderson & 



Cockerell). 



Range of the preceding. 



FamUy 64. OXALIDACEAE Lindl. Wood sorrel famUy. 



266. XANTHOXALIS Small. Yellow wood sorrel. 



662. X. stricta (L.) Small [Oralis striata L.] Upright yel- 

 low wood sorrel. 



Common throughout except at the higher elevations, espe- 

 cially along roads and railroads, and in yards about houses, 

 5100-8000 ft. (Daniels, 572). 



Nova Scotia to South Dakota; Florida to Texas and 

 Colorado : adventitious in Europe. 



Order 25. EUPHORBIALES. 

 FamUy 65. EUPHORBIACEAE St. Hil. Spurge famUy. 



267. CROTON L. Croton. 



663. C. Texensis (Klotzsch) Muell. Arg. Texas croton. 

 Longmont and Boulder (Rydberg). 



Illinois to Wyoming; Alaeama to Arizona and Mexico. 



