1919] RAMALEV—SACRAMENTO PLAINS 387 



Lobeliaceae 

 Downingia pulchella (Lindl.) Torr., C 



Carduaceae 

 Achyrachaena mollis Shauer, F 

 Baeria chrysostoma gracilis (DC.) Hall, C 

 Baeria Fremontii Gray, C 

 Baeria platycarpha Gray, F 

 Blennosperma californicum (DC.) T. and G., O 

 Hemizonia Fitchii Gray, O 

 Lasthenia glabrata DC, O 

 Psilocarphus brevissimus Nutt., C 



Cichoriaceae 

 Hypochaeris glabra Linn, (introduced), F 



Summary 



The numerous depressions of the Sacramento plains have a 

 very fine grained soil, where water stands during the period of 

 winter rain and even well into early spring. The vegetation is 

 very diflferent from that of the usual grassland of the region, being 

 composed of very few species, with practially no introduced 

 weeds. The depressions usually show a central area and a marginal 

 zone, the former characterized by a dense growth of Allocarya or 

 Baeria, and the latter by Floerkea Douglasii and Deschampsia 

 danthonioides . Subordinate species of both areas are noted and 

 the seasonal changes indicated. A systematic list is given of 29 

 species, 10 of which are marked as characteristic, 8 as frequent, 

 and 1 1 as merely occasional. 



University of Colorado 

 Boulder, Colo. 



