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IOWA ACADEMY OF SCIENCE Vou XXVII, 1920 
S. Wolfii Bebb. Beaver bog, west fork of St. Eouis creek, 9,000 feet; 
Spruce creek. 
S. glaucops Anders. Spruce creek, 9,500 feet, two sheets; Specimen 
Mountain, 10,000 feet, two sheets, and one sheet from, 11,500 feet; Mount 
Byers, 10,500 feet, three sheets. 
S. chlorophylla Anders. Rocky Mountain national park, 9,500 feet; 
Mount Byers, 11,000 feet. 
S. suhcoerulea Piper. West fork of St. Eouis creek, 9,000 feet; Spruce, 
creek; beaver bog on west fork of St. Eouis creek, 9,000 feet. 
S. geyeriana Anders. West fork of St. Eouis creek. 
S. scouleriana Barr. Eookout Mountain, 8,500 and 11,500 feet; Spruce 
creek. 
S. exigua Nutt. Golden, along streams. 
S. irrorata Anders. Specimen Mountain; Camp Uray; Fraser; com- 
mon in bogs. 
S. Pendleriana Anders. Camp Uray; Fraser. 
Betulaceae 
Betula glandulosa Michx. West fork of St. Eouis creek; Rocky Moun- 
tain national park; Grand river; Beaver creek; Fraser. 
B. fontinalis. Nutt. Berthoud Pass, 9,000 feet, in beaver bog; Grand 
river ; Beaver creek. 
Alnus tenuifolia Nutt. Spruce creek; Rocky Mountain national park, 
9,000 feet; in bogs and springy places. 
Fagaceae 
Quercus Gambellii Nutt. Denver and Manitou. Common on mountain 
slopes, 
Polygonaceae 
Briogonum alatum Torr. Eookout Mountain. 
B. umbellatum Torr. Eookout Mountain; Golden; common in spruce 
woods. 
B. effusum Nutt. Golden. 
B. rosetisis Nels & Kennedy. Specimen Mountain, 12,000 feet, appar- 
ently this species. 
Oxyria digyna (E) Campdera. Specimen Mountain, 12,900 feet; Mount 
Byers, 12,500 feet; common at and below timber line. 
Rumex mexicanus Meisn. Specimen Mountain, 11,500 feet; Milner 
Pass; dry, open, burnt-over areas. 
R. densifloni^^ Osterh. Beaver bog on west fork of St. Eouis creek, 
not common. 
Polygonum viviparum E. Milner Pass; frequent in bogs. 
P. douglasii Greene. West fork of St. Eouis creek; common in burnt- 
over areas. 
P. histortoides Pursh. Mount Byers, 11,500 feet; common in moist 
places near timber line. 
Chenopodiaceae 
Chenopodium album E. Specimen Mountain, introduced along trails. 
C. hotrys E. Golden; frequent in waste places. 
Blitum capitatum E. Specimen Mountain, 9,500 feet; burnt-over areas. 
