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| − | --><span class="statement" id="st-d0_s0" data-properties="stem orientation;stem location;stem width;stem position relational;stem width"><b>Horizontal </b>stems mainly shallowly buried, 0.5–3 mm wide, sometimes emerging, 1.1–2.2 mm wide;</span> <span class="statement" id="st-d0_s1" data-properties="leaf fixation or orientation;leaf shape;leaf shape;leaf shape;leaf length;leaf width;apex architecture or shape">leaves appressed, spatulate to lanceolate, 1.5–3.8 X 0.5–1.4 mm, apices truncate.</span> <span class="statement" id="st-d0_s2" data-properties="shoot orientation;shoot some measurement;shoot arrangement or growth form;shoot architecture or arrangement;shoot architecture;shoot "><b>Upright </b>shoots 6–14 cm, clustered, fasciculate, branching successively 3–5 times;</span> <span class="statement" id="st-d0_s3" data-properties="leaf shape;leaf length;leaf width;main-stem orientation;main-stem orientation;apex architecture or shape">leaves on upright main-stem ascending, deltate-ovate, 3.5–4 X 0.8 mm, apices needlelike.</span> <span class="statement" id="st-d0_s4" data-properties="branchlet shape;branchlet width;bud constriction duration;bud constriction shape;bud constriction prominence"><b>Branchlets </b>square in cross-section, 1.8–4 mm wide, annual bud constrictions abrupt and conspicuous;</span> <span class="statement" id="st-d0_s5" data-properties="underside pubescence;underside shape">underside often glaucous, concave;</span> <span class="statement" id="st-d0_s6" data-properties="upperside coloration;upperside reflectance;upperside reflectance;upperside reflectance;upperside shape">upperside green, dull to faintly shiny, convex.</span> <span class="statement" id="st-d0_s7" data-properties="leaf arrangement;branchlet arrangement"><b>Leaves </b>on branchlets 4-ranked, overlapping;</span> <span class="statement" id="st-d0_s8" data-properties="upperside leaf fixation or orientation;upperside leaf shape;upperside leaf some measurement;portion fusion;portion length;portion width">upperside leaves appressed, lanceolate, 3–5.8 mm, free portion of blades 1.7–2.9 X 0.1–1.1 mm;</span> <span class="statement" id="st-d0_s9" data-properties="lateral leaf arrangement;lateral leaf length;lateral leaf width;margin shape or vernation">lateral leaves strongly divergent, 3.3–6.5 X 1.8–2.4 mm, margins revolute;</span> <span class="statement" id="st-d0_s10" data-properties="underside leaf development;underside leaf orientation;underside leaf length;underside leaf width;underside leaf condition or size;blade shape;margin arrangement">underside leaves well developed, perpendicular to stem, 1.3–3.3 X 0.6–1.3 mm, unique in genus in having base contracted, blade flaring, and margins becoming parallel.</span> <span class="statement" id="st-d0_s11" data-properties="peduncle count"><b>Peduncles </b>absent.</span> <span class="statement" id="st-d0_s12" data-properties="strobilus architecture or arrangement or growth form;strobilus length;strobilus width;tip reproduction;tip count"><b>Strobili </b>solitary, 5–30 X 2–4 mm, sterile tips absent.</span> <span class="statement" id="st-d0_s13" data-properties="sporophyll shape;sporophyll shape;sporophyll shape;sporophyll length;sporophyll width"><b>Sporophylls </b>deltate to nearly cordate, 2.2–3.5 X 1.6–3 mm, apices gradually tapering.</span> <span class="statement" id="st-d0_s14" data-properties="apex shape;2n chromosome count">2n = 46.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Horizontal </b>stems mainly shallowly buried, 0.5–3 mm wide, sometimes emerging, 1.1–2.2 mm wide; leaves appressed, spatulate to lanceolate, 1.5–3.8 × 0.5–1.4 mm, apices truncate. <b>Upright</b> shoots 6–14 cm, clustered, fasciculate, branching successively 3–5 times; leaves on upright main stem ascending, deltate-ovate, 3.5–4 × 0.8 mm, apices needlelike. <b>Branchlets</b> square in cross section, 1.8–4 mm wide, annual bud constrictions abrupt and conspicuous; underside often glaucous, concave; upperside green, dull to faintly shiny, convex. <b>Leaves</b> on branchlets 4-ranked, overlapping; upperside leaves appressed, lanceolate, 3–5.8 mm, free portion of blades 1.7–2.9 × 0.1–1.1 mm; lateral leaves strongly divergent, 3.3–6.5 × 1.8–2.4 mm, margins revolute; underside leaves well developed, perpendicular to stem, 1.3–3.3 × 0.6–1.3 mm, unique in genus in having base contracted, blade flaring, and margins becoming parallel. <b>Peduncles</b> absent. <b>Strobili</b> solitary, 5–30 × 2–4 mm, sterile tips absent. <b>Sporophylls</b> deltate to nearly cordate, 2.2–3.5 × 1.6–3 mm, apices gradually tapering. <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_464.xml | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_464.xml |
| | |genus=Diphasiastrum | | |genus=Diphasiastrum |
| | |species=Diphasiastrum alpinum | | |species=Diphasiastrum alpinum |
| − | |2n chromosome count=46
| |
| − | |apex architecture or shape=needlelike;truncate
| |
| − | |apex shape=tapering
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| − | |blade shape=flaring
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| − | |branchlet arrangement=4-ranked
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| − | |branchlet shape=square
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| − | |branchlet width=1.8mm;4mm
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| − | |bud constriction duration=annual
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| − | |bud constriction prominence=conspicuous
| |
| − | |bud constriction shape=abrupt
| |
| − | |lateral leaf arrangement=divergent
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| − | |lateral leaf length=3.3mm;6.5mm
| |
| − | |lateral leaf width=1.8mm;2.4mm
| |
| − | |leaf arrangement=overlapping
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| − | |leaf fixation or orientation=appressed
| |
| − | |leaf length=3.5mm;4mm
| |
| − | |leaf shape=deltate-ovate;spatulate;lanceolate
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| − | |leaf width=0.8;0.5mm;1.4mm
| |
| − | |main-stem orientation=ascending;upright
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| − | |margin arrangement=parallel
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| − | |margin shape or vernation=revolute
| |
| − | |peduncle count=absent
| |
| − | |portion fusion=free
| |
| − | |portion length=1.7mm;2.9mm
| |
| − | |portion width=0.1mm;1.1mm
| |
| − | |shoot =3-5 times
| |
| − | |shoot architecture=branching
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| − | |shoot architecture or arrangement=fasciculate
| |
| − | |shoot arrangement or growth form=clustered
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| − | |shoot orientation=upright
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| − | |shoot some measurement=6cm;14cm
| |
| − | |sporophyll length=2.2mm;3.5mm
| |
| − | |sporophyll shape=deltate;nearly cordate
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| − | |sporophyll width=1.6mm;3mm
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| − | |stem location=buried
| |
| − | |stem orientation=horizontal
| |
| − | |stem position relational=emerging
| |
| − | |stem width=1.1mm;2.2mm
| |
| − | |strobilus architecture or arrangement or growth form=solitary
| |
| − | |strobilus length=5mm;30mm
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| − | |strobilus width=2mm;4mm
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| − | |tip count=absent
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| − | |tip reproduction=sterile
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| − | |underside leaf condition or size=contracted
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| − | |underside leaf development=developed
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| − | |underside leaf length=1.3mm;3.3mm
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| − | |underside leaf orientation=perpendicular
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| − | |underside leaf width=0.6mm;1.3mm
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| − | |underside pubescence=glaucous
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| − | |underside shape=concave
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| − | |upperside coloration=green
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| − | |upperside leaf fixation or orientation=appressed
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| − | |upperside leaf shape=lanceolate
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| − | |upperside leaf some measurement=3mm;5.8mm
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| − | |upperside reflectance=dull;faintly shiny
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| − | |upperside shape=convex
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| | -->[[Category:Treatment]][[Category:Diphasiastrum]] | | -->[[Category:Treatment]][[Category:Diphasiastrum]] |
Horizontal stems mainly shallowly buried, 0.5–3 mm wide, sometimes emerging, 1.1–2.2 mm wide; leaves appressed, spatulate to lanceolate, 1.5–3.8 × 0.5–1.4 mm, apices truncate. Upright shoots 6–14 cm, clustered, fasciculate, branching successively 3–5 times; leaves on upright main stem ascending, deltate-ovate, 3.5–4 × 0.8 mm, apices needlelike. Branchlets square in cross section, 1.8–4 mm wide, annual bud constrictions abrupt and conspicuous; underside often glaucous, concave; upperside green, dull to faintly shiny, convex. Leaves on branchlets 4-ranked, overlapping; upperside leaves appressed, lanceolate, 3–5.8 mm, free portion of blades 1.7–2.9 × 0.1–1.1 mm; lateral leaves strongly divergent, 3.3–6.5 × 1.8–2.4 mm, margins revolute; underside leaves well developed, perpendicular to stem, 1.3–3.3 × 0.6–1.3 mm, unique in genus in having base contracted, blade flaring, and margins becoming parallel. Peduncles absent. Strobili solitary, 5–30 × 2–4 mm, sterile tips absent. Sporophylls deltate to nearly cordate, 2.2–3.5 × 1.6–3 mm, apices gradually tapering. 2n = 46.
Habitat: Dry conifer or mixed forests, grassy mountain slopes.
Distribution
Greenland, Alta., B.C., Nfld., N.W.T., Que., Yukon, Alaska, Colo, Idaho, Mont., Wash., Europe, Asia in Japan.
Discussion
The branchlet leaves of Diphasiastrum alpinum are unique in the genus, and the trowel-shaped underside leaves with their flared and rolled blades and contracted bases are particularly unusual. The leaves of the other North American species are much simpler in shape and contour.
Selected References
None.
