Pohlia cruda
Pohlia rabunbaldensis
opal pohlia, opal thread-moss, pohlia moss
0.5–2.5 cm.
0.5–1 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.
± spreading, slightly contorted when dry, lanceolate to ovate-lanceolate, 0.9–1.2 mm;
margins serrulate to serrate in distal 1/3;
costa subpercurrent;
distal medial laminal cells rhombic to rhomboidal, 45–95 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 when sterile;
axillary gemmae single, narrowly bulbiform, orange to orange-red, leaf primordia at apex and lower, sometimes to base, laminate, large, flexuose.
unknown.
Pohlia cruda
Pohlia rabunbaldensis
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 rabunbaldensis has bulbiform gemmae occurring singly in a leaf axil, similar to those of P. drummondii, but the leaf primordia are even larger relative to the gemma body. Plants of P. rabunbaldensis are slender, with dull leaves much like those of P. annotina, somewhat contorted when dry, distinct from the broader, carinate, somewhat shiny leaves of P. drummondii, which are unchanged on drying.
of conservation concern
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
CalFlora
Flora NW
MD Biodiversity
MI Flora
MN Wildflowers
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
