Pohlia cruda
Pohlia beringiensis
opal pohlia, opal thread-moss, pohlia moss
Bering's pohlia moss
0.5–2.5 cm.
0.5–2 cm.
erect to ± spreading, lanceolate to elliptic, 0.8–2 mm;
margins serrulate to serrate in distal 1/3;
costa subpercurrent;
distal medial laminal cells linear-rhomboidal, vermicular, firm, 70–140 µm, walls thin.
± erect, unaltered when dry, lanceolate, 0.9–1.5 mm;
margins serrulate to serrate in distal 1/3;
costa subpercurrent;
distal medial laminal cells linear-rhomboidal, vermicular, 60–100 µm, walls thin.
orange to orange-brown.
paroicous, rarely dioicous;
perigonial leaves in dioicous plants linear- or long-lanceolate from ovate base;
perichaetial leaves strongly or rarely weakly differentiated, linear-lanceolate.
unknown, presumed dioicous.
inclined 10–135°, stramineous to orange-brown, long- and slender-pyriform, neck 1/2 urn length;
exothecial cells elongate-rectangular, walls straight;
stomata superficial;
annulus present;
operculum conic;
exostome teeth yellow-brown to red-brown, acute-triangular;
endostome hyaline, basal membrane 1/2 exostome length, segments broadly keeled, broadly perforate, cilia short to long.
18–26 µm, ± coarsely papillose.
asexual reproduction absent.
asexual reproduction usually present;
axillary gemmae single, bulbiform, red, darker to black when dry, leaf primordia at apex and more proximally, laminate, large, flexuose.
unknown.
Pohlia cruda
Pohlia beringiensis
Pohlia cruda is distinguished by the glossy, pale green to whitish or bluish leaves that are narrowly elliptic to lanceolate; the laminal cells are long and narrowly linear-vermicular; the perichaetial leaves are strongly differentiated and linear-lanceolate; the sporophytes have necks about as long as the urn, with long-tapered exostome teeth, broadly keeled and perforate segments, and short to long cilia. Along with P. nutans, P. cruda is one of the most common North American species of the genus. Unlike P. nutans, P. cruda is restricted to northern and montane sites where it grows in rock crevices and on soil banks. The leaves of this species are sometimes slightly complanate. The gametophytes can be unisexual (dioicous) or bisexual (paroicous).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Pohlia beringiensis has cherry red stems with erect, whitish leaves and red bulbiform axillary gemmae. The gemmae are much like those of P. drummondii, but are even more red and contrast conspicuously with the whitish leaves. The organic-poor substrates on which P. beringiensis occurs are quite different from the relatively humic soils on which P. drummondii occurs.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
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MI Flora
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WildflowerSearch
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