Saxifraga occidentalis Wats. × Saxifraga rhomboidea Greene ?
Remarks: G. Hybrid ?.
Montana: Lewis and Clark County: On east slope of Haystack Butte. Elev. 5750 ft.
Many large colonies on moist parts of upper meadow. Phenology: Flowers.
Klaus H. Lackschewitz 4269, May 27, 1973
WTU, Accession: 265999C