Difference between revisions of "Atrichum angustatum"
Bryol. Europ. 4: 237. 1844,.
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|place=4: 237. 1844, | |place=4: 237. 1844, | ||
}} | }} | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Polytrichum angustatum | |name=Polytrichum angustatum | ||
|authority=Bridel | |authority=Bridel | ||
| + | |rank=species | ||
| + | |publication_title=Muscol. Recent., suppl. | ||
| + | |publication_place=1: 79. 1806 | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Atrichum angustatum var. plurilamellatum | |name=Atrichum angustatum var. plurilamellatum | ||
|authority=(Jennings) Frye | |authority=(Jennings) Frye | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=variety |
| + | }} {{Treatment/ID/Synonym | ||
|name=Atrichum macmillanii | |name=Atrichum macmillanii | ||
|authority=(Jennings) Frye | |authority=(Jennings) Frye | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=species |
| + | }} {{Treatment/ID/Synonym | ||
|name=Atrichum papillosum | |name=Atrichum papillosum | ||
|authority=(Müller Hal.) A. Jaeger & Sauerbeck | |authority=(Müller Hal.) A. Jaeger & Sauerbeck | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=species |
| + | }} {{Treatment/ID/Synonym | ||
|name=Atrichum xanthopelma | |name=Atrichum xanthopelma | ||
| − | |authority= | + | |authority= |
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Polytrichaceae;Atrichum;Atrichum angustatum | |hierarchy=Polytrichaceae;Atrichum;Atrichum angustatum | ||
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|elevation=low to moderate elevations | |elevation=low to moderate elevations | ||
|distribution=Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;Que.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mo.;Nebr.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.;Wis.;w Europe. | |distribution=Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;Que.;Ala.;Ark.;Conn.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Iowa;Kans.;Ky.;La.;Maine;Md.;Mass.;Mo.;Nebr.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;R.I.;S.C.;Tenn.;Tex.;Vt.;Va.;W.Va.;Wis.;w Europe. | ||
| − | |discussion=<p>Atrichum angustatum is a small, dioicous species, easily distinguished by its narrow, channeled leaves with numerous, tall, wavy lamellae, and small, ± isodiametric, bulging-mammillose, papillose leaf cells. A characteristic habitat for this species is mounds of subsoil thrown up by the roots of fallen trees. All Atrichum species develop cuticular papillae to some degree, but in no case are they as evident as in this species. Plants growing in more humid situations tend to be less strongly papillose. The distinction between A. angustatum, with smooth cells, and A. xanthopelma and A. macmillanii, with papillose cells, is without merit. The leaves of the type of A. angustatum (from South Carolina) are strongly papillose.</p> | + | |discussion=<p><i>Atrichum angustatum</i> is a small, dioicous species, easily distinguished by its narrow, channeled leaves with numerous, tall, wavy lamellae, and small, ± isodiametric, bulging-mammillose, papillose leaf cells. A characteristic habitat for this species is mounds of subsoil thrown up by the roots of fallen trees. All <i>Atrichum</i> species develop cuticular papillae to some degree, but in no case are they as evident as in this species. Plants growing in more humid situations tend to be less strongly papillose. The distinction between <i>A. angustatum</i>, with smooth cells, and A. xanthopelma and A. macmillanii, with papillose cells, is without merit. The leaves of the type of <i>A. angustatum</i> (from South Carolina) are strongly papillose.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Atrichum angustatum | name=Atrichum angustatum | ||
| − | |||
|authority=(Bridel) Bruch & Schimper | |authority=(Bridel) Bruch & Schimper | ||
|rank=species | |rank=species | ||
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|publication year= | |publication year= | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V27/V27_184.xml |
|genus=Atrichum | |genus=Atrichum | ||
|species=Atrichum angustatum | |species=Atrichum angustatum | ||
Latest revision as of 21:24, 5 November 2020
Plants small, dull yellowish green, sometimes with a reddish cast. Stems 1–2 cm. Leaves 4–8 × 0.4–0.8 mm, narrowly ligulate to oblong-lanceolate above, concave, strongly undulate, with prominent teeth in oblique rows on abaxial surface corresponding to the undulations, margins with mostly double teeth; costa subpercurrent, toothed on the back above; lamellae 6–9(–12), with wavy margins, 5–10(–15) cells high, widely spreading and covering much of the leaf surface; median cells of lamina 8–17(–19) µm wide, ± isodiametric with firm walls, bulging-mammillose on adaxial surface, usually with prominent minute, rounded or striate papillae, especially on the abaxial surface. Sexual condition dioicous; male plants about same size or smaller than females, the perigonial bracts broad, forming conspicuous antheridial buds, often with more than one bud in sequence per plant. Seta 1–3 cm, erect, typically 1 per perichaetium. Capsule 3–7 × 0.3–0.6 mm, narrowly cylindric, usually ± straight to somewhat curved, suberect or inclined. Spores 11–16 µm.
Phenology: Capsules mature spring–summer (Apr–Jul).
Habitat: Exposed soil banks along roads and trails in woods
Elevation: low to moderate elevations
Distribution
Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que., Ala., Ark., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va., Wis., w Europe.
Discussion
Atrichum angustatum is a small, dioicous species, easily distinguished by its narrow, channeled leaves with numerous, tall, wavy lamellae, and small, ± isodiametric, bulging-mammillose, papillose leaf cells. A characteristic habitat for this species is mounds of subsoil thrown up by the roots of fallen trees. All Atrichum species develop cuticular papillae to some degree, but in no case are they as evident as in this species. Plants growing in more humid situations tend to be less strongly papillose. The distinction between A. angustatum, with smooth cells, and A. xanthopelma and A. macmillanii, with papillose cells, is without merit. The leaves of the type of A. angustatum (from South Carolina) are strongly papillose.
Selected References
None.