Difference between revisions of "Orthotrichum strangulatum"
Prodr. Aethéogam., 81. 1805.
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|name=Orthotrichum calcareum | |name=Orthotrichum calcareum | ||
|authority=Austin | |authority=Austin | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=O. lescurii subsp. porteri | |name=O. lescurii subsp. porteri | ||
|authority=(Sullivant & Lesquereux) Kindberg | |authority=(Sullivant & Lesquereux) Kindberg | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=O. nudum var. strangulatum | |name=O. nudum var. strangulatum | ||
|authority=(P. Beauvois) Baehni | |authority=(P. Beauvois) Baehni | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=O. peckii | |name=O. peckii | ||
|authority=unknown | |authority=unknown | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=O. porteri | |name=O. porteri | ||
|authority=unknown | |authority=unknown | ||
| − | }}{{Treatment/ID/Synonym | + | }} {{Treatment/ID/Synonym |
|name=O. strangulatum var. missouricum | |name=O. strangulatum var. missouricum | ||
|authority=Holzinger ex Grout | |authority=Holzinger ex Grout | ||
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|elevation=low to moderate elevations (150-700 m) | |elevation=low to moderate elevations (150-700 m) | ||
|distribution=Man.;Ont.;Que.;Ala.;Ark.;Ill.;Ind.;Iowa;Kans.;Ky.;Maine;Md.;Minn.;Mo.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;S.C.;S.Dak.;Tenn.;Vt.;Va.;W.Va. | |distribution=Man.;Ont.;Que.;Ala.;Ark.;Ill.;Ind.;Iowa;Kans.;Ky.;Maine;Md.;Minn.;Mo.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;S.C.;S.Dak.;Tenn.;Vt.;Va.;W.Va. | ||
| − | |discussion=<p>The Orthotrichum strangulatum complex contains three species, all endemic to eastern and central North America. These three species all occur as blackish, dense tufts on dry calcareous rock and have similar sporophytes with immersed, oblong, deeply 8-ribbed capsules that are strongly constricted below the mouth when dry. The stomata are found in the distal capsule nearly covered by subsidiary cells, and the endostome segments are fragile. Although often described as one polymorphic species, here plants with 1-stratose, revolute margins are recognized as O. lescurii, those with 1-stratose, plane margins as O. parvulum, and those with multistratose leaf margins as O. strangulatum.</p> | + | |discussion=<p>The <i>Orthotrichum strangulatum</i> complex contains three species, all endemic to eastern and central North America. These three species all occur as blackish, dense tufts on dry calcareous rock and have similar sporophytes with immersed, oblong, deeply 8-ribbed capsules that are strongly constricted below the mouth when dry. The stomata are found in the distal capsule nearly covered by subsidiary cells, and the endostome segments are fragile. Although often described as one polymorphic species, here plants with 1-stratose, revolute margins are recognized as <i>O. lescurii</i>, those with 1-stratose, plane margins as <i>O. parvulum</i>, and those with multistratose leaf margins as <i>O. strangulatum</i>.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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|publication year=1805 | |publication year=1805 | ||
|special status=Endemic | |special status=Endemic | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V28/V28_103.xml |
|genus=Orthotrichum | |genus=Orthotrichum | ||
|species=Orthotrichum strangulatum | |species=Orthotrichum strangulatum | ||
Revision as of 18:03, 18 September 2019
Plants 0.4–1 cm. Stem leaves stiff, erect when dry, ovate- to oblong-lanceolate, 2–2.7 mm; margins thick to near apex, entire; apex acute to ± narrowly obtuse; basal laminal cells quadrate to rectangular, walls thin, not nodose; distal cells 7–12 µm, 1-stratose, occasionally with 2-stratose streaks, papillae 2 or 3 per cell, conic, sometimes 2-fid, size moderate; marginal cells 2–3(–7)-stratose. Specialized asexual reproduction absent. Sexual condition gonioautoicous. Seta to 0.8 mm. Capsule immersed to 1/2 emergent, oblong-ovate to oblong, 1.1–1.8 mm, distinctly 8-ribbed, constricted below mouth when dry; stomata immersed; peristome single, rarely double; prostome present; exostome teeth 16, incurved-erect to spreading-recurved, granulose or reticulate-papillose; endostome segments absent or rarely 8, not well developed, of 1 row of cells, short, smooth. Calyptra oblong-conic, smooth, hairy, hairs papillose. Spores 12–16 µm.
Habitat: Dry, exposed, calcareous or dolomite bluffs, rock faces
Elevation: low to moderate elevations (150-700 m)
Distribution
Man., Ont., Que., Ala., Ark., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Minn., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., S.Dak., Tenn., Vt., Va., W.Va.
Discussion
The Orthotrichum strangulatum complex contains three species, all endemic to eastern and central North America. These three species all occur as blackish, dense tufts on dry calcareous rock and have similar sporophytes with immersed, oblong, deeply 8-ribbed capsules that are strongly constricted below the mouth when dry. The stomata are found in the distal capsule nearly covered by subsidiary cells, and the endostome segments are fragile. Although often described as one polymorphic species, here plants with 1-stratose, revolute margins are recognized as O. lescurii, those with 1-stratose, plane margins as O. parvulum, and those with multistratose leaf margins as O. strangulatum.
Selected References
None.