Difference between revisions of "Diphasiastrum sitchense"
Preslia 47: 108. 1975.
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GeoffLevin (talk | contribs) m (Fixed Nfld. and Labr. distribution to match printed version.) |
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|habitat=Alpine meadows, open rocky barrens, conifer woods | |habitat=Alpine meadows, open rocky barrens, conifer woods | ||
|elevation=200–2000 m | |elevation=200–2000 m | ||
| − | |distribution=Greenland;St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Idaho;Maine;Mont.;N.H.;N.Y.;Oreg.;Vt.;Wash.;Asia in Kamchatka;Japan. | + | |distribution=Greenland;St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Idaho;Maine;Mont.;N.H.;N.Y.;Oreg.;Vt.;Wash.;Asia in Kamchatka;Japan. |
|discussion=<p>The mature shoots in <i>Diphasiastrum sitchense</i> resemble the juvenile phases of the other species. The unique, round, 5-ranked leaves may represent an early developmental state.</p><!-- | |discussion=<p>The mature shoots in <i>Diphasiastrum sitchense</i> resemble the juvenile phases of the other species. The unique, round, 5-ranked leaves may represent an early developmental state.</p><!-- | ||
--><p>The hybrid <i>Diphasiastrum alpinum</i> X sitchense is very rare. It is known from Greenland, British Columbia, Newfoundland, Montana, Oregon, and Washington. Specimens of <i>D. sitchense</i> from Greenland, Newfoundland, and Washington cited by J. H. Wilce (1965) are actually this hybrid.</p> | --><p>The hybrid <i>Diphasiastrum alpinum</i> X sitchense is very rare. It is known from Greenland, British Columbia, Newfoundland, Montana, Oregon, and Washington. Specimens of <i>D. sitchense</i> from Greenland, Newfoundland, and Washington cited by J. H. Wilce (1965) are actually this hybrid.</p> | ||
| Line 47: | Line 47: | ||
|habitat=Alpine meadows, open rocky barrens, conifer woods | |habitat=Alpine meadows, open rocky barrens, conifer woods | ||
|elevation=200–2000 m | |elevation=200–2000 m | ||
| − | |distribution=Greenland;St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Idaho;Maine;Mont.;N.H.;N.Y.;Oreg.;Vt.;Wash.;Asia in Kamchatka;Japan. | + | |distribution=Greenland;St. Pierre and Miquelon;Alta.;B.C.;Man.;N.B.;Nfld. and Labr.;N.S.;Ont.;P.E.I.;Que.;Sask.;Yukon;Alaska;Idaho;Maine;Mont.;N.H.;N.Y.;Oreg.;Vt.;Wash.;Asia in Kamchatka;Japan. |
|reference=None | |reference=None | ||
|publication title=Preslia | |publication title=Preslia | ||
|publication year=1975 | |publication year=1975 | ||
|special status= | |special status= | ||
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_277.xml |
|genus=Diphasiastrum | |genus=Diphasiastrum | ||
|species=Diphasiastrum sitchense | |species=Diphasiastrum sitchense | ||
Latest revision as of 22:15, 20 February 2024
Horizontal stems on substrate surface or shallowly buried, 1–2.7 mm wide; leaves appressed, broadly lanceolate, 1.8–3.2 × 0.5–1 mm, apex blunt. Upright shoots clustered and branching mostly at base, 5.5–17.5 cm; leaves appressed, broadly lanceolate, 1.8–3.2 × 0.5–1 mm, apex acuminate. Branchlets dark green, somewhat shiny, round in cross section, 1.7–2.5 mm wide, annual bud constrictions inconspicuous. Leaves on branchlets monomorphic, 5-ranked, not overlapping, appressed to spreading-ascending, incurved, free portion of blades 3.4–5.6 × 0.4–0.9 mm, widest at middle, apex sharply pointed. Peduncles absent or rarely 1 cm. Stalks absent. Strobili solitary on upright shoots, 4.5–38 × 3–5 mm, gradually narrowing to rounded tip. Sporophylls deltate, 1.8–3.6 × 1.7–2.8 mm; apex rounded. 2n = 46.
Habitat: Alpine meadows, open rocky barrens, conifer woods
Elevation: 200–2000 m
Distribution
Greenland, St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Idaho, Maine, Mont., N.H., N.Y., Oreg., Vt., Wash., Asia in Kamchatka, Japan.
Discussion
The mature shoots in Diphasiastrum sitchense resemble the juvenile phases of the other species. The unique, round, 5-ranked leaves may represent an early developmental state.
The hybrid Diphasiastrum alpinum X sitchense is very rare. It is known from Greenland, British Columbia, Newfoundland, Montana, Oregon, and Washington. Specimens of D. sitchense from Greenland, Newfoundland, and Washington cited by J. H. Wilce (1965) are actually this hybrid.
Selected References
None.