19 



Ammannia coccinea Rottb. 



Cherry county, July 26. (89) A peculiar form, found once 

 in a wet valley in the lake region. 

 Lythrum alatum L. 



Valley of Dad's Lake, Cherry county, July 26. (162) 

 Oenothera albicauUs Nutt. 



Brown county, July 28. (212) 

 Oenothera coronopifolia Torr. & Gray. 

 Box Butte county, July 6. (213) 

 Oenothera rhombipetala Nutt. 



Sheridan county, July 12. (214) Dry valleys and sand 

 hills throughout the region; prairies, Brown county. 

 Oenothera serrulata Njitt. 



Sheridan county, July 12. (215) Prairies, Box Butte 

 county, July 7, Brown county, July 28. Blow-outs and 

 sand hills throughout the region. In the sand hills it has 

 a different aspect — low, very woody, spreading, much 

 branched, flowers dark yellow. On the prairie it is erect, 

 simple, slightly woody at base only, flowers light yellow. 

 Gaura coccinea Nutt. 



Box Butte county, July 6. (210) 

 Mamillaria vivipara (Nutt.) Haw. 



Cherry county, July 15. (216) Prairies, Box Butte county, 

 and sand hills and dry valleys throughout the region. 

 Opuntia rafinesquii Engelm. 



Cherry county, July 15. (217) Sandhills throughout the 

 region. 

 Opuntia fragilis (Nutt.) Haw. 



Joy's ranch, Sheridan county, July 10. (218) Sand hills, 

 Sheridan county. 

 *Cornus pubescens Nutt. 



Long Pine, July 29. (183) (Has both appressed and silky 

 hairs on the same leaves, as in C. baileyi Coulter & Evans, 

 but the stone is that of C. pubescens. It may possibly be 

 a hybrid between C. pubescens and C. stolonifera Michxs. ) 



