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| − | --><span class="statement" id="st-d0_s0" data-properties="stem orientation;stem location;stem width"><b>Horizontal </b>stems on substrate surface or shallowly buried, 1–2.7 mm wide;</span> <span class="statement" id="st-d0_s1" data-properties="leaf fixation or orientation;leaf shape;leaf length;leaf width;apex shape">leaves appressed, broadly lanceolate, 1.8–3.2 X 0.5–1 mm, apex blunt.</span> <span class="statement" id="st-d0_s2" data-properties="shoot orientation;shoot arrangement or growth form;shoot architecture;shoot some measurement"><b>Upright </b>shoots clustered and branching mostly at base, 5.5–17.5 cm;</span> <span class="statement" id="st-d0_s3" data-properties="leaf fixation or orientation;leaf shape;leaf length;leaf width;apex shape">leaves appressed, broadly lanceolate, 1.8–3.2 X 0.5–1 mm, apex acuminate.</span> <span class="statement" id="st-d0_s4" data-properties="branchlet coloration;branchlet reflectance;branchlet shape;branchlet width;bud constriction duration;bud constriction prominence"><b>Branchlets </b>dark green, somewhat shiny, round in cross-section, 1.7–2.5 mm wide, annual bud constrictions inconspicuous.</span> <span class="statement" id="st-d0_s5" data-properties="leaf arrangement;leaf arrangement;leaf orientation;leaf orientation;leaf orientation;leaf orientation;branchlet architecture;portion fusion;portion length;portion width;portion width;apex shape"><b>Leaves </b>on branchlets monomorphic, 5-ranked, not overlapping, appressed to spreading-ascending, incurved, free portion of blades 3.4–5.6 X 0.4–0.9 mm, widest at middle, apex sharply pointed.</span> <span class="statement" id="st-d0_s6" data-properties="peduncle count;peduncle count;peduncle some measurement"><b>Peduncles </b>absent or rarely 1 cm.</span> <span class="statement" id="st-d0_s7" data-properties="stalk count"><b>Stalks </b>absent.</span> <span class="statement" id="st-d0_s8" data-properties="strobilus architecture or arrangement or growth form;strobilus length;strobilus width;strobilus width;shoot orientation;tip shape"><b>Strobili </b>solitary on upright shoots, 4.5–38 X 3–5 mm, gradually narrowing to rounded tip.</span> <span class="statement" id="st-d0_s9" data-properties="sporophyll shape;sporophyll length;sporophyll width"><b>Sporophylls </b>deltate, 1.8–3.6 X 1.7–2.8 mm;</span> <span class="statement" id="st-d0_s10" data-properties="">apex rounded.</span> <span class="statement" id="st-d0_s11" data-properties="apex shape;2n chromosome count">2n = 46.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Horizontal </b>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. <b>Upright</b> 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. <b>Branchlets</b> dark green, somewhat shiny, round in cross section, 1.7–2.5 mm wide, annual bud constrictions inconspicuous. <b>Leaves</b> 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. <b>Peduncles</b> absent or rarely 1 cm. <b>Stalks</b> absent. <b>Strobili</b> solitary on upright shoots, 4.5–38 × 3–5 mm, gradually narrowing to rounded tip. <b>Sporophylls</b> deltate, 1.8–3.6 × 1.7–2.8 mm; apex rounded. <b>2n</b> = 46.</span><!-- |
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| | |publication year=1975 | | |publication year=1975 |
| | |special status= | | |special status= |
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_277.xml | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_277.xml |
| | |genus=Diphasiastrum | | |genus=Diphasiastrum |
| | |species=Diphasiastrum sitchense | | |species=Diphasiastrum sitchense |
| − | |2n chromosome count=46
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| − | |apex shape=rounded;pointed;acuminate;blunt
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| − | |branchlet architecture=monomorphic
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| − | |branchlet coloration=dark green
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| − | |branchlet reflectance=shiny
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| − | |branchlet shape=round
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| − | |branchlet width=1.7mm;2.5mm
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| − | |bud constriction duration=annual
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| − | |bud constriction prominence=inconspicuous
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| − | |leaf arrangement=not overlapping;5-ranked
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| − | |leaf fixation or orientation=appressed;appressed
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| − | |leaf length=1.8mm;3.2mm
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| − | |leaf orientation=incurved;appressed;spreading-ascending
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| − | |leaf shape=lanceolate;lanceolate
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| − | |leaf width=0.5mm;1mm
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| − | |peduncle count=rarely;absent
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| − | |peduncle some measurement=1
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| − | |portion fusion=free
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| − | |portion length=3.4mm;5.6mm
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| − | |portion width=widest;0.4mm;0.9mm
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| − | |shoot architecture=branching
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| − | |shoot arrangement or growth form=clustered
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| − | |shoot orientation=upright;upright
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| − | |shoot some measurement=5.5cm;17.5cm
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| − | |sporophyll length=1.8mm;3.6mm
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| − | |sporophyll shape=deltate
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| − | |sporophyll width=1.7mm;2.8mm
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| − | |stalk count=absent
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| − | |stem location=buried
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| − | |stem orientation=horizontal
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| − | |stem width=1mm;2.7mm
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| − | |strobilus architecture or arrangement or growth form=solitary
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| − | |strobilus length=4.5mm;38mm
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| − | |strobilus width=narrowing;3mm;5mm
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| − | |tip shape=rounded
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| | -->[[Category:Treatment]][[Category:Diphasiastrum]] | | -->[[Category:Treatment]][[Category:Diphasiastrum]] |
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., 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.
