164 UNIVERSITY OF MISSOURI STUDIES [3 1 2 



268. TRAGIA L. Nettle spurge. 



664. T. ramosa Torr. Branching nettle spurge. 

 Dry soil and under rocks, 5100-6000 ft. (Daniels, 86). 

 Missouri to Colorado; Texas to Arizona and Mexico. 



269. CHAMAESYCE S. F. Gray. Spurge. 



665. C. petaloidea (Engelm.) Small [Euphorbia petaloidea 

 Engelm.]. White-flowered spurge. 



Along the road and railroad in Boulder Canon, and in creek- 

 sands along Boulder creek, 5400-7000 ft. (Daniels, 775). Also 

 at Longmont (Rydberg). 



Iowa to Wyoming ; Texas to Colorado. 



666. C. Fendleri (T. & G.) Small [Euphorbia Fendleri T. & 

 G.]. Fendler's spurge. 



Foot of Valmont Butte, near Owen's lake, '5300-5400 ft. 

 (Daniels, 666). 

 Nebraska to Wyoming ; Texas to Arizona. 



667. C. glyptosperma (Engelm.) Small [Euphorbia glyptosper- 

 ma Engelm.]. Ridge-seeded spurge. 



Abundant in sandy places and along railroads, 5100-7000 

 (Sunset Canon) ft. (Daniels, 576). 

 Ontario to British Columbia ; Texas to Mexico. 



668. C. rugulosa (Engelm.) Rydb. [Euphorbia serpyllifolia 

 rugulosa Engelm.]. Rugulose-seeded spurge. 



Mountains between Sunshine and Ward (Rydberg). 

 Wyoming and New Mexico to California, 



669. C. serpyllifolia (Pers.) Small [Euphorbia serpyllifolia 

 Pers.]. Thyme-leaved spurge. 



Very common in waste places, along roadsides and rail- 

 roads, and on creek-sands, 5100-8000 ft. (Daniels, 420). Also 

 at Lyons (Rydberg). 



Michigan to Washington; Texas to California and 

 Mexico. 



