Pohlia cruda |
Pohlia bulbifera |
|
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opal pohlia, opal thread-moss, pohlia moss |
blunt-bud pohlia, blunt-bud thread-moss, pohlia moss |
|
Habit | Plants medium-sized to large, green, whitish, or sometimes bluish tinged, shiny. | Plants small to medium-sized, green, glossy. |
Stems | 0.5–2.5 cm. |
0.3–3 cm. |
Leaves | 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, lanceolate, 0.9–1.4 mm; margins serrulate to serrate in distal 1/3; costa subpercurrent; distal medial laminal cells rhombic to rhomboidal, 65–95 µm, walls thin. |
Seta | orange to orange-brown. |
orange-brown. |
Sexual condition | 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 scarcely differentiated, lanceolate. |
Capsule | 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, pyriform, neck 1/3 urn length; exothecial cells short-rectangular, walls sinuate; stomata superficial; annulus present; operculum convex-conic; exostome teeth yellow-brown, narrowly triangular-acute; endostome hyaline, basal membrane 1/2 exostome length, segments distinctly keeled, broadly perforate, cilia short to rudimentary. |
Spores | 18–26 µm, ± coarsely papillose. |
16–21 µm, finely roughened. |
Specialized | asexual reproduction absent. |
asexual reproduction usually present when sterile; axillary gemmae 2–6, spheroid to obovate, shorter than leaves, yellow, orange, or green, leaf primordia restricted to apex and forming dome, laminate. |
Pohlia cruda |
Pohlia bulbifera |
|
Phenology | Capsules mature summer (Jun–Aug). | Capsules mature summer (Jun–Aug). |
Habitat | Soil banks, rock crevices, under roots, tundra soil and paths | Acid, gravelly or sandy disturbed soil, path banks, stream banks, peaty soil |
Elevation | moderate to high elevations | low to high elevations |
Distribution |
AK; AZ; CA; CO; IA; ID; MA; MD; ME; MI; MN; MT; NC; NE; NJ; NM; NV; NY; OR; PA; SD; TN; UT; VA; VT; WA; WV; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; QC; SK; YT; Mexico; South America; Australia; Greenland; Pacific Islands; Eurasia; Antarctica
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AK; CO; MA; ME; MI; NH; NY; VT; WA; WI; BC; MB; NB; NL; NS; NT; ON; QC; Greenland; Eurasia |
Discussion | 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.) |
The gemmae of Pohlia bulbifera appear to be round to oblong because the four or five laminate leaf primordia are concave and form a dome over the gemma apex. The leaves are wide-spreading so the gemmae, although small, can be seen clustered in the distal leaf axils. This species sometimes occurs on peaty soils in bogs but also occurs on gravelly soils in disturbed places. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 28, p. 198. | FNA vol. 28, p. 206. |
Parent taxa | Mielichhoferiaceae > Pohlia | Mielichhoferiaceae > Pohlia |
Sibling taxa | ||
Synonyms | Mnium crudum | Webera bulbifera |
Name authority | (Hedwig) Lindberg: Musc. Scand., 18. (1879) | (Warnstorf) Warnstorf: in C. F. Warnstorf et al., Krypt.-Fl. Brandenburg 1: 429. (1904) |
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