Difference between revisions of "Selaginella hansenii"

Hieronymus

Hedwigia 39: 301. 1900.

Common names: Hansen's spike-moss
Treatment appears in FNA Volume 2.
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--><span class="statement" id="st-d0_s0" data-properties="plant growth form or habitat;mat architecture or fragility;mat arrangement or growth form"><b>Plants </b>terrestrial, forming loose to clustered mats.</span> <span class="statement" id="st-d0_s1" data-properties="upperside growth form or orientation;upperside shape;underside growth form or orientation;underside shape;branch development;tip orientation"><b>Stems </b>not readily fragmenting, prostrate, upperside and underside structurally different, irregularly forked, branches determinate, tips upturned.</span> <span class="statement" id="st-d0_s2" data-properties="rhizophore diameter"><b>Rhizophores </b>borne on upperside of stems, throughout stem length, 0.25–0.45 mm diam.</span> <span class="statement" id="st-d0_s3" data-properties="leaf width;leaf architecture;leaf arrangement;leaf fixation or orientation;leaf orientation;leaf coloration;leaf coloration;leaf coloration;leaf shape;leaf shape;leaf shape;leaf atypical length;leaf length;leaf width;underside leaf length or size"><b>Leaves </b>with underside leaves slightly longer and narrower than upperside leaves, otherwise monomorphic, not clearly ranked, tightly appressed, ascending, green or green with red spots, or reddish, linear-lanceolate (underside) to linear-triangular (upperside), (2–) 3–4.5 X 0.5–0.6 mm;</span> <span class="statement" id="st-d0_s4" data-properties="abaxial ridge count">abaxial ridges present;</span> <span class="statement" id="st-d0_s5" data-properties="base fusion;base pubescence">base abruptly adnate, pubescent (sometimes glabrous);</span> <span class="statement" id="st-d0_s6" data-properties="margin architecture or pubescence or shape;cilium coloration;cilium coloration;cilium coloration;cilium fixation or orientation;cilium orientation;cilium some measurement">margins ciliate, cilia white to white opaque, strongly appressed and ascending, 0.03–0.1 mm;</span> <span class="statement" id="st-d0_s7" data-properties="apex some measurement;bristle coloration;bristle coloration;bristle coloration">apex with bristle white to white-opaque, 0.5–1.4 mm (those on underside leaves sometimes 1/4–1/2 longer than those on upperside leaves).</span> <span class="statement" id="st-d0_s8" data-properties="strobilus architecture or arrangement or growth form;strobilus some measurement"><b>Strobili </b>solitary, 5–7 mm;</span> <span class="statement" id="st-d0_s9" data-properties="sporophyll shape;sporophyll shape;sporophyll shape;abaxial ridge prominence;base pubescence;margin architecture or pubescence or shape;apex shape">sporophylls ovate-deltate to ovate-triangular, abaxial ridges not prominent, base glabrous, margins short-ciliate, apex bristled.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>terrestrial, forming loose to clustered mats. <b>Stems</b> not readily fragmenting, prostrate, upperside and underside structurally different, irregularly forked, branches determinate, tips upturned. <b>Rhizophores</b> borne on upperside of stems, throughout stem length, 0.25–0.45 mm diam. <b>Leaves</b> with underside leaves slightly longer and narrower than upperside leaves, otherwise monomorphic, not clearly ranked, tightly appressed, ascending, green or green with red spots, or reddish, linear-lanceolate (underside) to linear-triangular (upperside), (2–)3–4.5 × 0.5–0.6 mm; abaxial ridges present; base abruptly adnate, pubescent (sometimes glabrous); margins ciliate, cilia white to white opaque, strongly appressed and ascending, 0.03–0.1 mm; apex with bristle white to white-opaque, 0.5–1.4 mm (those on underside leaves sometimes 1/4–1/2 longer than those on upperside leaves). <b>Strobili</b> solitary, 5–7 mm; sporophylls ovate-deltate to ovate-triangular, abaxial ridges not prominent, base glabrous, margins short-ciliate, apex bristled.</span><!--
  
 
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|publication year=1900
 
|publication year=1900
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_695.xml
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|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_695.xml
 
|genus=Selaginella
 
|genus=Selaginella
 
|subgenus=Selaginella subg. Tetragonostachys
 
|subgenus=Selaginella subg. Tetragonostachys
 
|species=Selaginella hansenii
 
|species=Selaginella hansenii
|abaxial ridge count=present
 
|abaxial ridge prominence=not prominent
 
|apex shape=bristled
 
|apex some measurement=0.5mm;1.4mm
 
|base fusion=adnate
 
|base pubescence=glabrous;pubescent
 
|branch development=determinate
 
|bristle coloration=white;white-opaque
 
|cilium coloration=white;white opaque
 
|cilium fixation or orientation=appressed
 
|cilium orientation=ascending
 
|cilium some measurement=0.03mm;0.1mm
 
|leaf architecture=monomorphic
 
|leaf arrangement=ranked
 
|leaf atypical length=2mm;3mm
 
|leaf coloration=reddish;green;green
 
|leaf fixation or orientation=appressed
 
|leaf length=3mm;4.5mm
 
|leaf orientation=ascending
 
|leaf shape=linear-lanceolate;linear-triangular
 
|leaf width=0.5mm;0.6mm
 
|margin architecture or pubescence or shape=short-ciliate;ciliate
 
|mat architecture or fragility=loose
 
|mat arrangement or growth form=clustered
 
|plant growth form or habitat=terrestrial
 
|rhizophore diameter=0.25mm;0.45mm
 
|sporophyll shape=ovate-deltate;ovate-triangular
 
|strobilus architecture or arrangement or growth form=solitary
 
|strobilus some measurement=5mm;7mm
 
|tip orientation=upturned
 
|underside growth form or orientation=prostrate
 
|underside leaf length or size=longer
 
|underside shape=forked
 
|upperside growth form or orientation=prostrate
 
|upperside shape=forked
 
 
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-->[[Category:Treatment]][[Category:Selaginella subg. Tetragonostachys]]
 
-->[[Category:Treatment]][[Category:Selaginella subg. Tetragonostachys]]

Revision as of 14:26, 27 July 2019

Plants terrestrial, forming loose to clustered mats. Stems not readily fragmenting, prostrate, upperside and underside structurally different, irregularly forked, branches determinate, tips upturned. Rhizophores borne on upperside of stems, throughout stem length, 0.25–0.45 mm diam. Leaves with underside leaves slightly longer and narrower than upperside leaves, otherwise monomorphic, not clearly ranked, tightly appressed, ascending, green or green with red spots, or reddish, linear-lanceolate (underside) to linear-triangular (upperside), (2–)3–4.5 × 0.5–0.6 mm; abaxial ridges present; base abruptly adnate, pubescent (sometimes glabrous); margins ciliate, cilia white to white opaque, strongly appressed and ascending, 0.03–0.1 mm; apex with bristle white to white-opaque, 0.5–1.4 mm (those on underside leaves sometimes 1/4–1/2 longer than those on upperside leaves). Strobili solitary, 5–7 mm; sporophylls ovate-deltate to ovate-triangular, abaxial ridges not prominent, base glabrous, margins short-ciliate, apex bristled.


Habitat: Cliffs and rocky slopes or on igneous rock
Elevation: 330–1350 m

Discussion

Leaf dimorphism in Selaginella hansenii is only slightly and inconsistently expressed; the upperside leaves tend to be more lanceolate, short, and slightly thick, whereas the underside leaves tend to be more linear, longer, and thinner, but in some specimens the leaves are monomorphic. Red leaves are rare within Selaginella subg. Tetragonostachys, otherwise found in the flora only occasionally in S. rupestris. Such leaves are more common in S. steyermarkii Alston from southern Mexico and Guatemala and S. sartorii Hieronymus from Mexico.

Selected References

None.

Lower Taxa

None.