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IOWA ACADEMY OF SCIENCE Voi.. XXVII, 1920 
Amelanchier alnifolia. Spruce creek; along streams and in ravines. 
Prunus americana Marsh. Manitou; thickets on mountain sides. 
P. pennsylvanica E. Golden; along streams. 
P. demissa (Nutt.) Walp. Golden; in thickets and ravines, on mountain 
sides. 
Leguminosae 
Thermopsis montana Nutt. West fork of St. Louis creek; mountain 
sides. 
Lupinus argenteus Pursh. Golden; common on mountain slopes and in 
dry places. 
L. parviflorus Nutt. Common at Camp Uray on Grand river. 
Medicago sativa L. Golden; naturalized on mountain sides. 
Trifolium dasyphyllum T. & G. Specimen Mountain, 12,900 feet; Mount 
Byers, 10,000 to 12,900 feet; near timber line. 
T. nana Torr. Specimen Mountain, 12,900 feet; Mount Byers, 12,0(X) 
feet. 
Astragalus alpinus L. Specimen Mountain, 11,500 feet; west fork of 
St. Louis creek, 9,000 feet; tall forms in mountain meadows. 
A. elegans Hook. {A. oroboides var americana Gray) Mountain mead- 
ows at the base of Mount Byers. 
Glycyrrhiza lepidota Pursh. Golden; along irrigation ditches. 
Psoralea tenuifolia Pursh. Mountain slopes near Golden. 
Vida americana Muhl. West fork of St. Louis creek, 9, (MX) feet; Moun- 
tain parks. 
Robinia neo-mexicana Gray. Manitou; introduced and naturalized. 
Geraniaceae 
Geranium Richardsonii Fisch. & Traut. Manitou; lower part of Mount 
Byers; common in parks. 
G. Fremonti Torr. Spruce creek; Golden; Berthoud Pass. 
Anacardiaceae 
Rhus trilobata Nutt. Manitou; common on dry mountain slopes. 
Celastraceae 
Pachystima myrsinites Raf. Spruce creek; west fork of St. Louis 
creek. 
Aceraceae 
Acer glabrum Torr. Golden; mountain ravines and along streams. 
Rhamnaceae 
Ceanothus Fendleri Gray. Mountain slopes near Golden. 
C. velutinus Dough Spruce creek; in burnt-over pine woods. 
•Malvaceae 
Sidalcea Candida Gray. Foot of Mount Byers, 9,000 feet; in mountain 
meadows and parks. 
Loasaceae 
Mentzelia albicaulis Dough Dry mountain slopes near Golden. 
Elaeagnaceae 
Shepherdia canadensis (L) Nutt. Mount Byers; in pine and spruce 
woods. 
