Difference between revisions of "Ptychostomum warneum"
Phytologia 87: 22. 2005.
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| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Mnium caespiticium var. warneum | |name=Mnium caespiticium var. warneum | ||
|authority=Röhling | |authority=Röhling | ||
| + | |rank=variety | ||
| + | |publication_title=Deutschl. Fl. ed. | ||
| + | |publication_place=2, 3: 94. 1813 | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Bryum warneum | |name=Bryum warneum | ||
| − | |authority= | + | |authority= |
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Bryaceae;Ptychostomum;Ptychostomum subg. Ptychostomum;Ptychostomum warneum | |hierarchy=Bryaceae;Ptychostomum;Ptychostomum subg. Ptychostomum;Ptychostomum warneum | ||
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name=Ptychostomum warneum | name=Ptychostomum warneum | ||
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|authority=(Röhling) J. R. Spence | |authority=(Röhling) J. R. Spence | ||
|rank=species | |rank=species | ||
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|publication year=2005 | |publication year=2005 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V28/V28_278.xml |
|genus=Ptychostomum | |genus=Ptychostomum | ||
|subgenus=Ptychostomum subg. Ptychostomum | |subgenus=Ptychostomum subg. Ptychostomum | ||
Latest revision as of 21:34, 5 November 2020
Plants in dense or open turfs, red, green, or yellow-green. Stems 0.5–2(–3) cm, fertile stems comose, innovations evenly foliate. Leaves yellow-green to red, crowded, strongly contorted to shrunken when dry, ovate-lanceolate, flat, 0.5–2 mm, often gradually enlarged toward stem apex; base usually green, not decurrent; margins revolute proximally, limbidium strong, in 2 or 3 rows; apex acuminate; costa short-excurrent, awn slender; proximal laminal cells rectangular, 3–4:1; medial and distal cells 18–22 µm wide, 2–3:1, walls thin. Specialized asexual reproduction absent. Sexual condition usually polyoicous, sometimes autoicous. Seta purple or red, 2–4(–5) cm, stout, straight to somewhat flexuose. Capsule yellow-brown or brown, pyriform, symmetric, 2–4 mm, mouth yellow; hypophysis slender; operculum long-conic; peristome reduced; exostome teeth yellow or brown basally, pale yellow to hyaline distally, lamellae straight, pores absent near base along mid line; endostome weakly adherent to exostome, basal membrane 1/2 exostome height, segments narrowly perforate, cilia absent or rudimentary. Spores with size variable in same capsule, (32–)36–48(–50) µm, pale green or yellow.
Phenology: Capsules mature Jul–Aug.
Habitat: Damp soil
Elevation: low elevations (0-50 m)
Distribution
Greenland, Que., n Eurasia (Himalayan Nepal).
Discussion
Ptychostomum warneum is an arctic-boreal species that is distinguished from the related P. calophyllum by its pyriform brown capsule with a slender neck, generally larger spores, and acuminate leaves. The stems are sparsely radiculose; the costal awns are smooth. The species is known from only one location in Quebec, in the Mingan Islands. Capsules are needed for identification.
Selected References
None.