Key to Species: 17
HOME | 1b hair points not dentate >2b high, conical papillae lacking > 5b leaves with hair points > 13b pellucid alar border absent > 15a leaf margins unistratose > 16b costa 2-3 stratose >
Racomitrium affine - Mt. Isabelle, Jackson Co., Oregon. DHW m0474.
17a Hair point fairly slender, spinose, not or moderately decurrent; leaves mostly less than 3.5 mm; seta with a left handed twist (like reverse threads on machine screws); occasional, not common, but widespread
Racomitrium affine (Scleich. ex Web. & Mohr) Lindb .
Racomitrium lawtoniae - Mt. Pilchuck, Snohomish Co., Washington. R. Ireland 6116.
17b Hair points hyaline, stiff, broad, flattened, straight to squarrose, entire to minutely denticulate, clearly decurrent; leaves longer than 4 mm; seta with a right handed twist (unique among species of Racomitrium in this regard); more common to the north, not yet found in Oregon but reported from California in Norris & Shevock (2004a)
Racomitrium lawtoniae Ireland
Guide to Racomitrium of Oregon
Created 2007 Northwest Botanical Institute