Difference between revisions of "Selaginella watsonii"

L. Underwood

Bull. Torrey Bot. Club 25: 127. 1898.

Common names: Alpine spike-moss Watson's spike-moss
Treatment appears in FNA Volume 2.
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--><span class="statement" id="st-d0_s0" data-properties="mat length or size;mat architecture or arrangement;mat shape"><b>Plants </b>on rock or terrestrial, forming long or compact cushionlike mats.</span> <span class="statement" id="st-d0_s1" data-properties="stem architecture or shape;stem growth form or orientation;stem growth form or orientation;stem growth form or orientation;stem shape;branch architecture or shape;tip course"><b>Stems </b>radially symmetric, decumbent to long-creeping, not readily fragmenting, irregularly forked, without budlike arrested branches, tips straight;</span> <span class="statement" id="st-d0_s2" data-properties="main-stem development;lateral branch development;lateral branch orientation;lateral branch shape">main-stem conspicuously determinate, lateral branches conspicuously or inconspicuously determinate, strongly ascending, 1–3-forked.</span> <span class="statement" id="st-d0_s3" data-properties="rhizophore diameter"><b>Rhizophores </b>borne on upperside of stems, throughout stem length, 0.35–0.55 mm diam.</span> <span class="statement" id="st-d0_s4" data-properties="leaf architecture;leaf fixation or orientation;leaf orientation;leaf coloration;leaf shape;leaf atypical length;leaf length;leaf width;pseudowhorl arrangement;pseudowhorl count"><b>Leaves </b>monomorphic, in alternate pseudowhorls of 4, tightly or loosely appressed, ascending, green, linear-lanceolate, (2.5–) 3–4 X 0.5–0.7 mm;</span> <span class="statement" id="st-d0_s5" data-properties="abaxial ridge prominence">abaxial ridges prominent;</span> <span class="statement" id="st-d0_s6" data-properties="base shape;base shape;base pubescence;base pubescence">base cuneate, decurrent, glabrous or sometimes pubescent;</span> <span class="statement" id="st-d0_s7" data-properties="margin architecture;margin architecture;cilium coloration;cilium arrangement;cilium orientation;cilium some measurement">margins entire or short-ciliate, cilia transparent, scattered, spreading, 0.05–0.1 mm;</span> <span class="statement" id="st-d0_s8" data-properties="apex shape;apex shape;apex shape">apex strongly keeled, obtuse, abruptly bristled;</span> <span class="statement" id="st-d0_s9" data-properties="bristle coloration;bristle coloration;bristle coloration;bristle architecture or pubescence or relief;bristle some measurement">bristle whitish to transparent, smooth, 0.25–0.5 mm.</span> <span class="statement" id="st-d0_s10" data-properties="strobilus architecture or arrangement or growth form;strobilus atypical some measurement;strobilus some measurement"><b>Strobili </b>solitary, 0.5–3 (–3.5) cm;</span> <span class="statement" id="st-d0_s11" data-properties="sporophyll shape;sporophyll shape;sporophyll shape;abaxial ridge prominence;base pubescence;margin architecture or shape;margin architecture or shape;apex shape;apex shape;apex shape;apex shape">sporophylls lanceolate to ovatelanceolate, abaxial ridges well defined, base glabrous, margins entire, rarely dentate, apex strongly keeled to truncate in profile, short-bristled.</span><!--
+
--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>on rock or terrestrial, forming long or compact cushionlike mats. <b>Stems</b> radially symmetric, decumbent to long-creeping, not readily fragmenting, irregularly forked, without budlike arrested branches, tips straight; main stem conspicuously determinate, lateral branches conspicuously or inconspicuously determinate, strongly ascending, 1–3-forked. <b>Rhizophores</b> borne on upperside of stems, throughout stem length, 0.35–0.55 mm diam. <b>Leaves</b> monomorphic, in alternate pseudowhorls of 4, tightly or loosely appressed, ascending, green, linear-lanceolate, (2.5–)3–4 × 0.5–0.7 mm; abaxial ridges prominent; base cuneate, decurrent, glabrous or sometimes pubescent; margins entire or short-ciliate, cilia transparent, scattered, spreading, 0.05–0.1 mm; apex strongly keeled, obtuse, abruptly bristled; bristle whitish to transparent, smooth, 0.25–0.5 mm. <b>Strobili</b> solitary, 0.5–3(–3.5) cm; sporophylls lanceolate to ovate-lanceolate, abaxial ridges well defined, base glabrous, margins entire, rarely dentate, apex strongly keeled to truncate in profile, short-bristled.</span><!--
  
 
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|publication year=1898
 
|publication year=1898
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_579.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_579.xml
 
|genus=Selaginella
 
|genus=Selaginella
 
|subgenus=Selaginella subg. Tetragonostachys
 
|subgenus=Selaginella subg. Tetragonostachys
 
|species=Selaginella watsonii
 
|species=Selaginella watsonii
|abaxial ridge prominence=defined;prominent
 
|apex shape=short-bristled;strongly keeled;truncate
 
|base pubescence=glabrous;pubescent;glabrous
 
|base shape=decurrent;cuneate
 
|branch architecture or shape=budlike
 
|bristle architecture or pubescence or relief=smooth
 
|bristle coloration=whitish;transparent
 
|bristle some measurement=0.25mm;0.5mm
 
|cilium arrangement=scattered
 
|cilium coloration=transparent
 
|cilium orientation=spreading
 
|cilium some measurement=0.05mm;0.1mm
 
|lateral branch development=determinate
 
|lateral branch orientation=ascending
 
|lateral branch shape=1-3-forked
 
|leaf architecture=monomorphic
 
|leaf atypical length=2.5mm;3mm
 
|leaf coloration=green
 
|leaf fixation or orientation=appressed
 
|leaf length=3mm;4mm
 
|leaf orientation=ascending
 
|leaf shape=linear-lanceolate
 
|leaf width=0.5mm;0.7mm
 
|main-stem development=determinate
 
|margin architecture=short-ciliate;entire
 
|margin architecture or shape=dentate;entire
 
|mat architecture or arrangement=compact
 
|mat length or size=long
 
|mat shape=cushionlike
 
|pseudowhorl arrangement=alternate
 
|pseudowhorl count=4
 
|rhizophore diameter=0.35mm;0.55mm
 
|sporophyll shape=lanceolate;ovatelanceolate
 
|stem architecture or shape=symmetric
 
|stem growth form or orientation=decumbent;long-creeping
 
|stem shape=forked
 
|strobilus architecture or arrangement or growth form=solitary
 
|strobilus atypical some measurement=3cm;3.5cm
 
|strobilus some measurement=0.5cm;3cm
 
|tip course=straight
 
 
}}<!--
 
}}<!--
  
 
-->[[Category:Treatment]][[Category:Selaginella subg. Tetragonostachys]]
 
-->[[Category:Treatment]][[Category:Selaginella subg. Tetragonostachys]]

Revision as of 13:23, 27 July 2019

Plants on rock or terrestrial, forming long or compact cushionlike mats. Stems radially symmetric, decumbent to long-creeping, not readily fragmenting, irregularly forked, without budlike arrested branches, tips straight; main stem conspicuously determinate, lateral branches conspicuously or inconspicuously determinate, strongly ascending, 1–3-forked. Rhizophores borne on upperside of stems, throughout stem length, 0.35–0.55 mm diam. Leaves monomorphic, in alternate pseudowhorls of 4, tightly or loosely appressed, ascending, green, linear-lanceolate, (2.5–)3–4 × 0.5–0.7 mm; abaxial ridges prominent; base cuneate, decurrent, glabrous or sometimes pubescent; margins entire or short-ciliate, cilia transparent, scattered, spreading, 0.05–0.1 mm; apex strongly keeled, obtuse, abruptly bristled; bristle whitish to transparent, smooth, 0.25–0.5 mm. Strobili solitary, 0.5–3(–3.5) cm; sporophylls lanceolate to ovate-lanceolate, abaxial ridges well defined, base glabrous, margins entire, rarely dentate, apex strongly keeled to truncate in profile, short-bristled.


Habitat: On exposed or shaded cliffs, rocky slopes, rock crevices, granite boulders, quartzite rock, gravelly or sandy soil, alpine meadows, or swampy grounds
Elevation: 1800–4300 m

Distribution

V2 579-distribution-map.gif

Ariz., Calif., Idaho, Mont., Nev., Oreg., Utah, Wyo.

Discussion

R. M. Tryon (1955) suggested that Selaginella watsonii is a possible ancestor of (or shares a common ancestor with) S. leucobryoides, S. asprella, and S. utahensis (see discussion).

Selected References

None.

Lower Taxa

None.
... more about "Selaginella watsonii"
Iván A. Valdespino +
L. Underwood +
Alpine spike-moss +  and Watson's spike-moss +
Ariz. +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wyo. +
1800–4300 m +
On exposed or shaded cliffs, rocky slopes, rock crevices, granite boulders, quartzite rock, gravelly or sandy soil, alpine meadows, or swampy grounds +
Bull. Torrey Bot. Club +
Selaginella watsonii +
Selaginella subg. Tetragonostachys +
species +