72 Muhlenbergia, Volume 9 
CORISPERMUM NITIDUM Kit. 
Locally common on the steppe. 
DONDIA ERECTA (Wats.) A. Nelson 
Abundant on bare clay of blowouts on flats along streams. 
Also in fields, Perkins county. 
DonbIA Moouintt (Torr.) A. Nelson 
Locally common on foothills and mesas. 
ABRONIA MICRANTHA (‘Torr.) Choisy 
Infrequent in sandy areas of flood plains. 
ALLIONIA PILOSA (Nutt.) Rydb. 
Occasioual on sand. 
PARONYCHIA SESSILIFOLIA Nutt. ? 
Abundant in gravelly soil in the drier parts of the steppe. 
Grows in compact clumps from a strong root. 
ATRAGENE OCCIDENTALIS Hornem. 
Jv Widespread, especially in’ boxelder groves. 
RANUNCULUS EREMOGENES Greene 
Uncommon along brooks in the forest reserves. 
ARABIS CADUCA A. Nelson 
Rare, Short Pine hills. 
LESQUERELLA ALPINA (Nutt.) Wats. 
Common on the bare soils of tables, ete. 
LESQUERELLA ARGENTEA (Pursh) MacM. 
Common on the steppe. 
LESQUERELLA LUNELLII A. Nelson 
J Abundant on the steppe. 
RADICULA LYRATA (Nutt.) Greene 
Abundant on muddy margins of streams throughout. 
SOPHIA PINNATA (Walt.) Britton 
J Common on tables of buttes. 
POLANISIA GRAVEOLENS Raf. 
J Common in sand. 
