Pohlia cruda
Pohlia cardotii
opal pohlia, opal thread-moss, pohlia moss
cardot's pohlia moss
0.5–2.5 cm.
0.4–2.5 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 to ± spreading, ovate-lanceolate, 0.7–1.5 mm;
margins strongly recurved, serrulate to serrate in distal 1/3;
costa subpercurrent;
distal medial laminal cells rhombic, 18–50 µm, walls thick, ± porose.
orange to orange-brown.
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.
dioicous;
perigonial leaves broadly short-ovate;
perichaetial leaves weakly differentiated, elongate-lanceolate.
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.
inclined 0–20°, brown to stramineous, narrowly pyriform, neck 1/3 urn length;
exothecial cells short-rectangular, walls sinuate;
stomata superficial;
annulus present;
operculum bluntly to acutely conic;
exostome teeth yellow to brown, narrowly triangular-acute;
endostome hyaline, basal membrane scarcely exceeding capsule rim, segments narrow, weakly keeled, distinctly perforate, cilia absent to rudimentary.
18–26 µm, ± coarsely papillose.
14–19 µm, finely roughened.
asexual reproduction absent.
asexual reproduction absent.
Pohlia cruda
Pohlia cardotii
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 cardotii is a rare alpine species characterized by dull green, relatively broad leaves with wide costae and recurved margins. The distal medial laminal cells of P. cardotii have more or less porose walls. The sporophytes are erect, with irregular exostome teeth, a low endostomial basal membrane, and narrow, slightly keeled, broadly perforate segments. This species sometimes forms deep turfs in moist alpine sites.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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