TABLE 1 



Showing the average iiainlxr of plants per sq. in. (/uailral and the per cent of 

 quadrats in which they occur, on X.E. and S.W. txposuretf, respectively, in the 

 prairie formation 



Per cent of bare ground 



Koelerla cristata 



FeMuca ovina ingrata 



Agropyron spicatutn (including var 



inerme) 



Poa sandbergii 



Achillea millefolium lanulosa 



Rosa spp 



Symphoricarpos racemosus, 



Lupiiius ornalus 



Solidago missouriensis 



Hoorebekia racemosa 



Lithospermum ruderale 



Collinsia tenella 



Epilobium paniculatum 



Bromus hordeaceus 



Balsamorhiza sagittata 



Helianthella douglasii 



Agoseris heterophylla 



Allium acuminatum 



Alyssum alynsoides 



Wyethia amplexicaulis 



Antennaria luzuloides 



Potentilla blaschkeaiia 



Siversia ciliata 



Aster spp. and Erigeron corymbosus . 



Hieracium scouleri 



Castilkja liitescen.t 



Synthyris rtibra 



Galium boreale 



Geranium viscosissimum 



Gaillardia aristata 



Brom.us brizaeformis 



Carex geyeri 



Lupinus leucophyllus 



Viola adunca 



Sidalrea oreqana 



Heuchera glabella 



Drymocallis convallaria 



Gentiana oregana 



Arnica pedunculata 



Epilobium angustifolium 



Silene douglasii 



Carduus palousensis 



or 



a 



1 



H < 

 >' 



3 



9 



10 



go 

 w 



K m 



< F 



O « 



si 



29 



100 



100 



100 

 29 



90 

 71 



84 



64 

 29 

 26 

 39 

 13 

 26 

 16 

 29 



14 

 5 

 4 

 3 

 2 

 9 

 9 

 7 

 2 

 6 



6 

 1 

 13 I 

 1 

 2 



1 

 3 

 1 

 1 

 1 

 2 





or 



CO 



PS 



o « 



100 

 81 

 58 

 67 

 61 

 80 

 71 

 84 

 68 

 23 



67 

 26 

 71 

 10 

 39 

 39 

 42 

 32 

 35 

 29 

 32 



19 



13 



9 

 4 



a 



2 

 3 



7 

 3 

 2 

 1 

 3 

 5 

 16 

 3 

 6 

 1 

 7 

 1 

 1 

 1 



3 

 2 

 

 2 

 1 

 1 

 1 



H 



LIST IXCLUDKS NO IM.ANTS AVKRAGIXG 

 LESS THAN 0.5 PBK Stl. M. 



100 Each V)unch of s:rassor Carex is counted 



as an individual 

 100 Bunches seldom more than 2.5 cm. in 

 1 diameter 



100 



100 

 62 



100 



72 

 82 



92 

 31 

 31 

 51 

 31 

 64 

 23 

 85 

 46 

 28 

 10 

 3 

 .) 

 18 



60 

 80 

 3 

 64 

 36 

 44 

 15 

 33 

 10 

 13 



3 



3 



Bunches from 2-10 cm. diameter. 

 Be.st developed on S. side 



Bunches often less than 3 cm . diameter 

 Clumps always small, often les."? than 



3 cm. diameter 

 Much better developed on S. side. 

 Each clump counted as one plant 

 Each clumj) counted as one plant 



u 



i 



J Each mat counted as one plant 



Each cluster of rosettes counted as one 

 plant 



This list does not include a few plants 

 that occur very early in the spring. 

 Of these Erylhronium grandiflorum, 

 confined to N. hillsides, is alone 

 important 



285 



