Pohlia cruda
Pohlia lescuriana
opal pohlia, opal thread-moss, pohlia moss
Lescur's pohlia moss, pretty nodding-moss, pretty pohlia
0.5–2.5 cm.
0.3–0.8 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, lanceolate, 0.7–1.2 mm;
base not or scarcely decurrent;
margins serrulate to serrate in distal 1/3;
costa subpercurrent;
distal medial laminal cells linear-rhomboidal, 65–110 µm, walls thin.
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 ovate;
perichaetial leaves weakly differentiated, lanceolate to linear-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 95–180°, brown to stramineous, broadly short-pyriform, neck 1/3 urn length;
exothecial cells short-rectangular, walls sinuate;
stomata superficial;
annulus present;
operculum short- to long-conic;
exostome teeth light yellow-brown, triangular-acute;
endostome hyaline, basal membrane 1/2 exostome length, segments tapered apically, distinctly keeled, broadly perforate, cilia short to rudimentary.
18–26 µm, ± coarsely papillose.
15–21 µm, finely roughened.
asexual reproduction absent.
asexual reproduction occasionally present;
rhizoidal tubers orange, orange-brown, or yellow.
Pohlia cruda
Pohlia lescuriana
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 lescuriana is an inconspicuous woodland species in eastern North America; it often grows in small sterile patches and can be recognized by the slender, pale green shoots. The sporophytes, never common, are short-pyriform to urceolate when dry. Yellow to orange gemmae sometimes occur on the rhizoids.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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