Pohlia cruda
Pohlia longicolla
opal pohlia, opal thread-moss, pohlia moss
pohlia moss
0.5–2.5 cm.
0.8–3.5 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, long-lanceolate, 1.5–2.6 mm;
margins serrulate to serrate in distal 1/3;
costa subpercurrent or percurrent;
distal medial laminal cells linear- rhomboidal, vermicular, firm, 80–140 µm, walls thin.
orange to orange-brown.
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.
paroicous;
perichaetial leaves gradually differentiated, ± long-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 10–90°, stramineous to orange-brown, long- and slender-pyriform, neck 1/2–1 time urn length;
exothecial cells elongate-rectangular, walls straight;
stomata superficial;
annulus present;
operculum conic;
exostome teeth yellow to brown, acute-triangular;
endostome hyaline, basal membrane 1/4–1/2 exostome length, segments narrowly keeled, narrowly to not perforate, cilia absent to rudimentary.
18–26 µm, ± coarsely papillose.
16–23 µm, distinctly roughened.
asexual reproduction absent.
asexual reproduction absent.
Pohlia cruda
Pohlia longicolla
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 longicolla, relatively rare in North America, is a handsome species characterized by relatively large, very shiny, long-lanceolate leaves. The plants are bisexual (paroicous) and commonly form sporophytes. The sporophytes have long necks, like those of P. elongata, and like that species, the endostomial segments are narrowly or not at all perforate and cilia are absent or rudimentary.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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