66 
IOWA ACADEMY OF SCIENCE Voi.. XXVII, 1920 
Mount Byers, 12,000 feet; west fork of St. Louis creek; in springy 
places. 
Arahis Drummondii Gray. Specimen Mountain, 11,000 feet. 
Smelowskia americana Ryd. Mount Byers, 12,500 feet. 
Draba streptocarpa Gray. Specimen Mountain, 11,500 feet. 
Sisymbrium pinnatum (Walt.) Britton. (S. canescens Nutt.) Mount 
Byers ; in burnt-over pine woods. 
S. Sophia L. Golden; a common weed in dry places. 
Crassulaceae 
Sedum mtegrifolium (Raf.) Nels. Specimen Mountain, 11,500 feet; 
west fork of St. Louis creek; moist places. 
S. rhodanthum Gray. Specimen Mountain, 12,900 feet; Mount Byers, 
11,000 feet; moist places near melting snow. 
S. stenopetalum Pursh. Specimen Mountain, 11,500 feet; Mount Byers, 
11.000 feet. 
Saxifragaceae 
Parnassia fimbriata Banks. Spruce creek, 9,500 feet; in moist mead- 
ows. 
Heuchera parvifolia Nutt. Mount Byers, 12,000 to 12,500 feet; moist 
places in spruce woods. 
Mitella pentandra Hook. Spruce creek; moist woods. 
Saxifraga austromontana Wiegand. (S. cognata and N. glacialis), Mount 
Byers, 12,000 feet; west fork of St. Louis creek. 
N. arguta Don. (S. punctata). Specimen Mountain, 12,500 feet; 
above timber line. 
Ribes parvulum (Gray) Ryd. Camp Uray on Grand River; Mount 
Byers, 10,500 feet. 
R. coloradense Coville. Specimen Mountain, 12,000 feet. 
R. cereum Lindl. Berthoud Pass ; Empire. 
R. aureum Pursh. Golden. 
Hydrangeaceae 
Jamesia americana T. & G. Empire. 
Rosaceae 
Cercocarpus parvifolius Nutt. Manitou; Berthoud Pass, 8,500 feet; 
Golden; on dry mountain slopes. 
Purshia tridentata DC. Camp Uray on Grand river; common. 
Physocarpus tridentata (Ryd.) Nels. (P. opulifolius in part.) Look- 
out Mountain and Golden; common in ravines. 
Dryas octopetala L. Specimen Mountain, 11,500 feet; Mount Byers, 
12.000 feet; mountain meadows above timber line. 
Dasiphora fruticosa (L) Ryd. {Potentilla fruticosa L.) Specimen 
Mountain, 11,000 feet; Berthoud Pass; common along streams and in 
parks. 
Rubus melanolasius Focke. (P. strigosus in part.) Camp Uray on Grand 
river; common at timber line. 
Sibbaldia procumbens L. Milner Pass, 11,700 feet; Mount Byers, 12,000 
feet; common in mountain meadows. 
