Difference between revisions of "Rhynchostegium aquaticum"
Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1876 – 77: 378. 1878.
FNA>Volume Importer |
imported>Volume Importer |
||
| (6 intermediate revisions by 2 users not shown) | |||
| Line 7: | Line 7: | ||
|year=1878 | |year=1878 | ||
}} | }} | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Hypnum aquaticum | |name=Hypnum aquaticum | ||
|authority=Hampe | |authority=Hampe | ||
| + | |rank=species | ||
| + | |publication_title=Linnaea | ||
| + | |publication_place=32: 61. 1863, | ||
}} | }} | ||
|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Platyhypnidium aquaticum | |name=Platyhypnidium aquaticum | ||
|authority=(A. Jaeger) M. Fleischer | |authority=(A. Jaeger) M. Fleischer | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=species |
| + | }} {{Treatment/ID/Synonym | ||
|name=Rhynchostegium obtusifolium | |name=Rhynchostegium obtusifolium | ||
|authority=(Mitten) A. Jaeger | |authority=(Mitten) A. Jaeger | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=species |
| + | }} {{Treatment/ID/Synonym | ||
|name=R. subrusciforme | |name=R. subrusciforme | ||
|authority=(Müller Hal.) A. Jaeger | |authority=(Müller Hal.) A. Jaeger | ||
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Brachytheciaceae;Rhynchostegium;Rhynchostegium aquaticum | |hierarchy=Brachytheciaceae;Rhynchostegium;Rhynchostegium aquaticum | ||
| Line 34: | Line 40: | ||
|elevation=low to high elevations (0-2000 m) | |elevation=low to high elevations (0-2000 m) | ||
|distribution=B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;Que.;Ala.;Ariz.;Ark.;Calif.;Conn.;Del.;Ga.;Idaho;Ill.;Ind.;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mo.;Mont.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;Ohio;Okla.;Oreg.;Pa.;S.C.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Mexico;Central America;South America;e Asia;Pacific Islands;Australia. | |distribution=B.C.;Man.;N.B.;Nfld. and Labr. (Nfld.);N.S.;Ont.;Que.;Ala.;Ariz.;Ark.;Calif.;Conn.;Del.;Ga.;Idaho;Ill.;Ind.;Ky.;Maine;Md.;Mass.;Mich.;Minn.;Mo.;Mont.;N.H.;N.J.;N.Mex.;N.Y.;N.C.;Ohio;Okla.;Oreg.;Pa.;S.C.;Tenn.;Tex.;Utah;Vt.;Va.;Wash.;W.Va.;Wis.;Mexico;Central America;South America;e Asia;Pacific Islands;Australia. | ||
| − | |discussion=<p>North American aquatic species of Rhynchostegium were long attributed to R. riparioides (Hedwig) Cardot. The molecular phylogenetic analyses by S. Huttunen et al. (2006) and Huttunen and M. S. Ignatov (2010) demonstrated that European-African populations and American-Asian-Australian populations of R. riparioides represent two groups of differing origins. Rhynchostegium aquaticum is widespread in North America. Some species of Hygrohypnum, for example, H. duriusculum, are rather similar, but their double costa distinguishes them. Oxyrrhynchium hians sometimes is similar, but the consistently spinulose abaxial end of the costa in branch leaves is a reliable character of that species, while the costa is smooth or ends in a small, inconspicuous projection in R. aquaticum. Donrichardsia pringlei is also similar, differing in smaller plant size, and stouter costa that reaches 0.85–0.95 leaf length, but is shorter in R. aquaticum. Leaves of R. aquaticum are usually characteristically obtuse, better observed in young leaves. The most reliable difference is the axillary hairs composed of short cells with length to width ratio 1.5–2.5:1 in Donrichardsia, while in Rhynchostegium cells of axillary hairs are long, with length to width ratio 3–6:1 (Huttunen and Ignatov).</p> | + | |discussion=<p>North American aquatic species of <i>Rhynchostegium</i> were long attributed to R. riparioides (Hedwig) Cardot. The molecular phylogenetic analyses by S. Huttunen et al. (2006) and Huttunen and M. S. Ignatov (2010) demonstrated that European-African populations and American-Asian-Australian populations of R. riparioides represent two groups of differing origins. <i>Rhynchostegium aquaticum</i> is widespread in North America. Some species of <i>Hygrohypnum</i>, for example, <i>H. duriusculum</i>, are rather similar, but their double costa distinguishes them. <i>Oxyrrhynchium hians</i> sometimes is similar, but the consistently spinulose abaxial end of the costa in branch leaves is a reliable character of that species, while the costa is smooth or ends in a small, inconspicuous projection in <i>R. aquaticum</i>. <i>Donrichardsia pringlei</i> is also similar, differing in smaller plant size, and stouter costa that reaches 0.85–0.95 leaf length, but is shorter in <i>R. aquaticum</i>. Leaves of <i>R. aquaticum</i> are usually characteristically obtuse, better observed in young leaves. The most reliable difference is the axillary hairs composed of short cells with length to width ratio 1.5–2.5:1 in <i>Donrichardsia</i>, while in <i>Rhynchostegium</i> cells of axillary hairs are long, with length to width ratio 3–6:1 (Huttunen and Ignatov).</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 43: | Line 49: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Rhynchostegium aquaticum | name=Rhynchostegium aquaticum | ||
| − | |||
|authority=A. Jaeger | |authority=A. Jaeger | ||
|rank=species | |rank=species | ||
| Line 57: | Line 62: | ||
|publication year=1878 | |publication year=1878 | ||
|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_708.xml |
|genus=Rhynchostegium | |genus=Rhynchostegium | ||
|species=Rhynchostegium aquaticum | |species=Rhynchostegium aquaticum | ||
Latest revision as of 21:37, 5 November 2020
Plants large, in loose tufts or extensive mats, deep green, brownish with age. Stems moderately densely terete-foliate, branches moderately densely terete-foliate; axillary hairs of 4–7 cells. Stem leaves erect or gradually reflexed from erect base, broadly ovate or suborbicular to ovate-lanceolate, 1.5–2.5 × 0.9–1.8 mm; margins serrate; apex ± broadly acute, extreme apices acute to blunt; costa to 70–85% leaf length, terminal abaxial spine inconspicuous, occasionally absent; alar cells somewhat enlarged, to 12–15 µm wide, region indistinct; laminal cells 40–90 × 5–7 µm; basal cells shorter, region in 1–2(–3) rows, indistinctly delimited from adjacent cells. Seta 1–2.3 cm. Capsule 1–2 mm; operculum stout-rostrate. Spores 13–16 µm.
Habitat: Rock, running water of small streams and springs, beds of waterfalls, seepy cliffs, limestone areas
Elevation: low to high elevations (0-2000 m)
Distribution
B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., Que., Ala., Ariz., Ark., Calif., Conn., Del., Ga., Idaho, Ill., Ind., Ky., Maine, Md., Mass., Mich., Minn., Mo., Mont., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Okla., Oreg., Pa., S.C., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Mexico, Central America, South America, e Asia, Pacific Islands, Australia.
Discussion
North American aquatic species of Rhynchostegium were long attributed to R. riparioides (Hedwig) Cardot. The molecular phylogenetic analyses by S. Huttunen et al. (2006) and Huttunen and M. S. Ignatov (2010) demonstrated that European-African populations and American-Asian-Australian populations of R. riparioides represent two groups of differing origins. Rhynchostegium aquaticum is widespread in North America. Some species of Hygrohypnum, for example, H. duriusculum, are rather similar, but their double costa distinguishes them. Oxyrrhynchium hians sometimes is similar, but the consistently spinulose abaxial end of the costa in branch leaves is a reliable character of that species, while the costa is smooth or ends in a small, inconspicuous projection in R. aquaticum. Donrichardsia pringlei is also similar, differing in smaller plant size, and stouter costa that reaches 0.85–0.95 leaf length, but is shorter in R. aquaticum. Leaves of R. aquaticum are usually characteristically obtuse, better observed in young leaves. The most reliable difference is the axillary hairs composed of short cells with length to width ratio 1.5–2.5:1 in Donrichardsia, while in Rhynchostegium cells of axillary hairs are long, with length to width ratio 3–6:1 (Huttunen and Ignatov).
Selected References
None.