Difference between revisions of "Pohlia filum"
Kungl. Svenska Vetenskapsakad. Avh. Naturskyddsärenden 14: 149. 1956.
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− | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Bryum filum | |name=Bryum filum | ||
|authority=Schimper | |authority=Schimper | ||
+ | |rank=species | ||
+ | |publication_title=Syn. Musc. Eur. ed. | ||
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name=Pohlia filum | name=Pohlia filum | ||
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|authority=(Schimper) Mårtenssen | |authority=(Schimper) Mårtenssen | ||
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|publication title=Kungl. Svenska Vetenskapsakad. Avh. Naturskyddsärenden | |publication title=Kungl. Svenska Vetenskapsakad. Avh. Naturskyddsärenden | ||
|publication year=1956 | |publication year=1956 | ||
− | |special status= | + | |special status=Illustrated |
− | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V28/V28_326.xml |
|genus=Pohlia | |genus=Pohlia | ||
|species=Pohlia filum | |species=Pohlia filum |
Latest revision as of 22:35, 5 November 2020
Plants small to medium-sized, green to light green, glossy. Stems 0.5–4 cm. Leaves erect, lanceolate, 0.6–1.2 mm; margins serrulate to serrate in distal 1/3; costa subpercurrent; distal medial laminal cells rhombic to rhomboidal, 35–95 µm, walls thin. Specialized asexual reproduction usually present when sterile; axillary gemmae 1 (or 2), bulbiform, oblong or elliptic to subglobose, green to yellow, black when old, leaf primordia restricted to apex or rarely 1 or 2 proximally, laminate, small, stiff. Sexual condition dioicous; perigonial leaves ovate; perichaetial leaves scarcely differentiated, lanceolate. Seta orange-brown. Capsule 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 16–23 µm, finely roughened.
Phenology: Capsules mature summer (Jun–Aug).
Habitat: Gravelly, organic-poor soil, glacial outwash, roadsides
Elevation: low to high elevations
Distribution
![V28 326-distribution-map.gif](/w/images/d/d8/V28_326-distribution-map.gif)
Greenland, Alta., B.C., N.W.T., Nunavut, P.E.I., Que., Sask., Alaska, Oreg., Europe.
Discussion
Pohlia filum is an easily recognized species characterized by erect, somewhat glossy leaves, and ovoid gemmae that normally arise singly in the leaf axils. The gemmae have a few small, triangular, rather stiff leaf primordia at the apex, rarely with one or two primordia proximal on the gemma body. The gemmae of P. drummondii are more elongate-cylindric and branchlike, with larger, flexuose, often green leaf primordia at the apex and also frequently more proximally on the gemma body.
Selected References
None.