Rhizomnium glabrescens
fan moss, large leafy moss, rhizomnium moss
reddish brown, brown, or black when old;
micronemata absent.
green to dark green, slightly contorted and somewhat undulate when dry, obovate or elliptic, (2.5–)4.5–6 mm;
margins green or sometimes reddish or brownish, 2–4-stratose;
apex rounded or occasionally obtuse or retuse, short-apiculate;
costa subpercurrent or percurrent;
medial laminal cells short-elongate, sometimes elongate or ± isodiametric, (35–)45–60(–70) µm, weakly or not collenchymatous, walls pitted;
marginal cells linear, in 3–4(–5) rows.
(2–)3–5 cm.
dioicous.
oblong or cylindric, 3–4.5 mm;
operculum conic-apiculate or conic-rostrate;
exostome greenish yellow, lamellae 18+.
30–45 µm.
Rhizomnium glabrescens
Rhizomnium glabrescens, common in coastal forests along the west coast, is small but distinctive. Male plants are characterized by rosettes of large leaves at the tops of the nearly naked stems. Small, scalelike leaves are present along the stem below the upper rosette. The stems of female and sterile stems have relatively large leaves. Sterile stems often arch, resembling those of Plagiomnium, but are always the same length or shorter than the fertile stems.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
CalFlora
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
