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UNIVERSITY OF COLORADO STUDIES 



Quercus utahensis (DC.) Rydb. 



Humulns lupulus neo-mexicanus Nels. and 

 Ckll. 



Chenopodium berlandieri Moq. 



Vaccaria vaccaria (L,.) Britton 



Batrachium flaccidum (Pers.) Rupr. (half- 

 submersed) 



Clematis ligusticifolia Nutt. 



Halerpestes cymbalaria (Pursh) Greene 



Ranunculus eremogenes Greene 



Ranunculus macounii Britton 



Ranunculus reptans L. 



Arabis oxyphylla Greene 



Roripa nasturtium (L.) Rusby 



Roripa sinuata (Nutt.) A. S. Hitch. 



Sophia incisa (Engelm.) Greene 



Peritoma serrulatum (Pursh) DC. (Cleome 

 serrulata Pursh) 



Ribes longiflorum Nutt. 



Geum strictum Ait. 



Crataegus saligna Greene 



Crataegus rivularis Nutt. 



Prunus melanocarpa (A. Nels.) Rydb. 



Astragalus canadensis Muhl. 



Astragalus patter sonii Gray 



Glycyrrhiza lepidota Nutt. 



Melilotus alba Desv. 



Vicia americana Muhl. 



Rhus trilobata Nutt. 



Acer interior Britton 



Sidalcea Candida A. Gray 



Sidalcea neo-mexicana A. Gray 



Lepargyraea argentea (Nutt.) Greene 



Epilobium adenocaulon Hausskn. 



Epilobium paniculaton Nutt. 



Onogra strigosa Rydb. 



Hippuris vulgaris L. 



Svida stolonifera riparia Rydb. 



Cicuta occidentalis Greene 



Sium cicutaejolium Gmelin 



Apocynum ambigens Greene 



Lappula floribunda (Lehm.) Greene 



Mentha borealis Michx. 



Monarda menthaefolia Benth. 



Stachys palustris L. 



C as title ja sulphur ea Rydb. 



Mimulus hallii Greene (half-submersed) 



Veronica americana Schwein. 



Veronica anagallis-aquatica L. 



Galium asperrimum Gray 



Lonicera involucrata Banks 



Symphoricarpos occidentalis Hook. 



Valeriana ceratophylla Hook. 



Troximon aurantiacum Hook. 



Achillaea lanulosa Nutt. 



Artemisia aromatica A. Nels. 



Aster adscendens Lindl. 



Aster hebecladus DC. 



Aster laetivirens Greene 



Erigeron diver gens T. & G. 



Erigeron ramosus (Walt.) B. S. P. 



Grindelia squarrosa (Pursh) Dunal 



Gymnolomia multiflora (Nutt.) B. & H. 



Helianthus nuttallii T. & G. 



Leptilon canadensis (L.) Britton 



Madia glomerata Hook. 



Rudbeckia ampla A. Nels. 



Rudbeckia laciniala L. 



Solidago canadensis L. 



Solidago elongata L. 



Lactuca pulchella (Pursh) DC. 



Sonchus asper (L.) All. 



Intermittent streams. — There are many intermittent streams in the 

 area covered. They usually occupy narrow, deep beds which have a 

 considerable grade. In August, when the region was visited, most of 

 these streams were completely dry and one was able to walk in the 

 bottom of the stream-bed. In some cases this was of soft shale, in other 

 cases of solid rock. Since there is flowing water only during times of 

 storms, there is no typical streamside vegetation. A sickly cottonwood 



