Meesia uliginosa
Meesia longiseta
broad-nerve hump-moss, meesia moss, swamp hump-moss
meesia moss
leaves erect to flexuose when dry, erect when moist, not 3-ranked, ligulate to narrowly lanceolate, 2–4 mm;
base not decurrent;
margins revolute basally and to near apex, entire;
apex obtuse to rounded (to acute in some arctic populations);
costa wide, ending just before apex;
inner laminal cells larger, walls thinner than marginal cells.
leaves spreading and somewhat twisted when dry, irregularly spreading and indistinctly 3-ranked when moist, ovate-lanceolate to lanceolate, 2–3.5 mm;
base decurrent;
margins plane to weakly reflexed basally, entire;
apex acute to narrowly obtuse;
costa narrow, ending in or just before apex;
inner laminal cells smaller, walls thicker than those of marginal cells.
1.5–5 cm.
5–11 cm.
usually dioicous.
synoicous.
1.5–4 mm.
3.5–4.5 mm.
40–51 µm.
36–44 µm.
Meesia uliginosa
Meesia longiseta
Distinguishing features of Meesia uliginosa include the ligulate leaves and strongly revolute leaf margins. The leaves are erect when dry or moist, and the costa is quite strong. The setae are generally much shorter than those of either M. longiseta or M. triquetra. Although M. uliginosa typically has obtuse leaf apices, some arctic populations have somewhat acute leaf apices; these have typical M. uliginosa costal anatomy.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Meesia longiseta is distinguished from M. triquetra by its entire leaf margins, synoicous sexual condition, and generally more slender leaves. The species occurs in habitats similar to those of M. triquetra.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
CalFlora
MI Flora
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
