l62 



UNIVERSITY OF COLORADO STUDIES 



the "Hudsonian" of Merriam 1 although the "average temperature 

 for the six hottest weeks of summer" would place it at the top of the 

 "Hudsonian" or bottom of the "Arctic." The altitude of Redrock 

 Lake, 10,000 feet (3,080 meters), seems to correspond nearly to 8,500 feet 

 (2,600 meters) on Mt. Shasta, California. 2 



Systematic List by Families 



Equisetaceae 



Equisetum arvense L. 

 Selaginellaceae 



Selaginella densa Rydb. 



Selaginella underwoodii Hieron. 

 Pinaceae 



Abies lasiocarpa (Hook.) Nutt. 



Picea engelmanni (Parry) Engelm. 



Pinus jlexilis James 



Pinus murrayana "Oreg. Com." 

 Juniperaceae 



Juniperus sibirica Burgsd. 

 Sparganiaceae 



Sparganium angustifolium Michx. 

 Zanichelliaceae 



Potamogeton alpinus Balbis 



Zannichellia palustris L. 

 Gramineae 



Agrostis tenuiculmis Nash. 



Calamagrostis purpurescens R. Br. 



Desehampsia caespitosa (L.) Beau v. 



Festuca ovina L. 



Hierochloe odorata L. 



Phleum alpinum L. 



Poa reflexa V. & S. 



Poa wheeleri Vasey 

 Cyperaceae 



Carex canescens L. 



Carex saxatilis L. 



Carex siccata Dewey 



Carex utriculata Boott. 



Carex varicifilis Bailey 



Eleocharis tenuis (Willd.) Schult. 

 Melanthaceae 



Zygadenus elegans Pursh. 



1 Merriam, "Life Zones and Crop Zones," Bull. 

 * Merriam, Biol. Surv. of Mt. Shasta, California 



Juncaceae 



Juncus balticus Willd. 



Juncus mertensianus Bong. 

 Convallariaceae 



Streptopus amplexifolius (L.) DC. 

 Orchidaceae 



Corallorrhiza ocheoleuca Rydb. 



Listera nephrophylla Rydb. 

 Salicaceae 



Populus tremuloides Michx. 



Salix bebbiana Sarg. 



Salix chlorophylla Anders. 



Salix glaucops Anders. 



Salix lutea Nutt. 

 Betulaceae 



Betula glandulosa Michx. 

 Polygonaceae 



Polygonum viviparum L. 

 Chenopodiaceae 



Blitum capitatum L. 

 Portulacaceae 



Lewisia pygmaea (Gray) Robins. 

 Caryophyllaceae 



Cerastium occidentale Greene 



Arenaria fendleri A. Gray 



Arenaria sajanensis Willd. 

 Ranunculaceae 



Aconitum columbianum Nutt. 



Anemone globosa Nutt. 



Atragene occidentalis Hornem. 



Batrachium fiaccidum (Pers.) Rupr. 



Caltha leptosepala Hook. 



Pulsatilla hirsutissima (Pursh) Britton 



Ranunculus reptans L. 



Trollius albiflorus (A. Gray) Rydb. 

 Biol. Surv., No. 10, p. 54, 1898. 

 (N. A. Fauna No. 16), p. 52, 1899. 



