Key to Species: 10
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Racomitrium norrisii - Selway Falls, Idaho Co., Idaho. DHW 810.
10a Leaf margin bistratose in one to several rows; in section with prominent bulges (pseudopapillae) over vertical walls; rare, not yet reported from Oregon or Washington but known from California and Idaho
Racomitrium norrisii Bednarek-Ochyra & Ochyra
Racomitrium aciculare - Idaho County, Idaho. DHW 802
10b Leaf margin unistratose throughout; in section the leaf cells with flat thickenings over the vertical walls (pseudopapillae) and narrow thin area over the cell lumens; common and widespread
Racomitrium aciculare (Hedw.) Brid.
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Guide to Racomitrium of Oregon
Created 2007 Northwest Botanical Institute