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| − | --><span class="statement" id="st-d0_s0" data-properties="plant growth form or habitat;mat density"><b>Plants </b>terrestrial, forming diffuse mats.</span> <span class="statement" id="st-d0_s1" data-properties="stem growth form or orientation;stem architecture;branch shape;branch prominence or shape;branch architecture;branch pubescence"><b>Stems </b>long-creeping, branched, branches 3-forked, flat, articulate, glabrous.</span> <span class="statement" id="st-d0_s2" data-properties="rhizophore diameter"><b>Rhizophores </b>borne on upperside of stems throughout stem length, 1–3 mm diam.</span> <span class="statement" id="st-d0_s3" data-properties="leaf fragility;leaf texture"><b>Leaves </b>delicate, papery.</span> <span class="statement" id="st-d0_s4" data-properties="lateral leaf orientation;lateral leaf arrangement;lateral leaf coloration;lateral leaf shape;lateral leaf length;lateral leaf width"><b>Lateral </b>leaves nearly perpendicular to stem, well spaced, green, lanceolate, 2.5–3.6 X 0.8–1.2 mm;</span> <span class="statement" id="st-d0_s5" data-properties="base shape">base rounded;</span> <span class="statement" id="st-d0_s6" data-properties="margin coloration;margin coloration;margin coloration;margin architecture or shape">margins slightly transparent to green, dentate;</span> <span class="statement" id="st-d0_s7" data-properties="apex shape">apex acute.</span> <span class="statement" id="st-d0_s8" data-properties="median leaf shape;median leaf shape;median leaf shape;median leaf length;median leaf width"><b>Median </b>leaves lanceolate to linear-lanceolate, 2–2.7 X 0.6–0.8 mm;</span> <span class="statement" id="st-d0_s9" data-properties="outer auricle size">base with small outer auricle;</span> <span class="statement" id="st-d0_s10" data-properties="margin coloration;margin coloration;margin coloration;margin architecture or shape">margins slightly transparent to green, dentate;</span> <span class="statement" id="st-d0_s11" data-properties="apex shape">apex acuminate.</span> <span class="statement" id="st-d0_s12" data-properties="strobilus architecture or arrangement or growth form;strobilus some measurement;megasporangium count;megasporangium position"><b>Strobili </b>solitary, 0.2–2.5 cm, with only 1 megasporangium, megasporangium basal;</span> <span class="statement" id="st-d0_s13" data-properties="sporophyll shape;sporophyll architecture or shape;sporophyll shape;base pubescence;margin shape;apex shape">sporophylls keeled, dentate, strongly tapering toward apex, base glabrous, margins denticulate, apex acuminate;</span> <span class="statement" id="st-d0_s14" data-properties="megasporophyll size;megasporophyll arrangement or shape;megasporophyll count;megasporophyll size;megasporophyll shape;group count;leaf count;leaf count;leaf shape;leaf reproduction;sporophyll shape">megasporophylls larger than microsporophylls, in groups of 4, 2 like vegetative leaves, 2 like sporophylls, of the latter 1 large, lanceolate-elliptic, 1 smaller, falcate-lanceolate;</span> <span class="statement" id="st-d0_s15" data-properties="">microsporophylls lanceolate to narrowly ovatelanceolate.</span> <span class="statement" id="st-d0_s16" data-properties="microsporophyll shape;microsporophyll shape;microsporophyll shape;2n chromosome count">2n = 20.</span><!-- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>terrestrial, forming diffuse mats. <b>Stems</b> long-creeping, branched, branches 3-forked, flat, articulate, glabrous. <b>Rhizophores</b> borne on upperside of stems throughout stem length, 1–3 mm diam. <b>Leaves</b> delicate, papery. <b>Lateral</b> leaves nearly perpendicular to stem, well spaced, green, lanceolate, 2.5–3.6 × 0.8–1.2 mm; base rounded; margins slightly transparent to green, dentate; apex acute. <b>Median</b> leaves lanceolate to linear-lanceolate, 2–2.7 × 0.6–0.8 mm; base with small outer auricle; margins slightly transparent to green, dentate; apex acuminate. <b>Strobili</b> solitary, 0.2–2.5 cm, with only 1 megasporangium, megasporangium basal; sporophylls keeled, dentate, strongly tapering toward apex, base glabrous, margins denticulate, apex acuminate; megasporophylls larger than microsporophylls, in groups of 4, 2 like vegetative leaves, 2 like sporophylls, of the latter 1 large, lanceolate-elliptic, 1 smaller, falcate-lanceolate; microsporophylls lanceolate to narrowly ovate-lanceolate. <b>2n</b> = 20.</span><!-- |
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| | |elevation=0–50 m | | |elevation=0–50 m |
| | |distribution=Ala.;Ga. | | |distribution=Ala.;Ga. |
| | + | |introduced=true |
| | |reference=None | | |reference=None |
| | |publication title=Index Seminum (Berlin) | | |publication title=Index Seminum (Berlin) |
| | |publication year=1860 | | |publication year=1860 |
| | |special status= | | |special status= |
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_317.xml | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_317.xml |
| | |genus=Selaginella | | |genus=Selaginella |
| | |subgenus=Selaginella subg. Stachygynandrum | | |subgenus=Selaginella subg. Stachygynandrum |
| | |species=Selaginella kraussiana | | |species=Selaginella kraussiana |
| − | |2n chromosome count=20
| |
| − | |apex shape=acuminate;acuminate;acute
| |
| − | |base pubescence=glabrous
| |
| − | |base shape=rounded
| |
| − | |branch architecture=articulate
| |
| − | |branch prominence or shape=flat
| |
| − | |branch pubescence=glabrous
| |
| − | |branch shape=3-forked
| |
| − | |group count=2
| |
| − | |lateral leaf arrangement=spaced
| |
| − | |lateral leaf coloration=green
| |
| − | |lateral leaf length=2.5mm;3.6mm
| |
| − | |lateral leaf orientation=perpendicular
| |
| − | |lateral leaf shape=lanceolate
| |
| − | |lateral leaf width=0.8mm;1.2mm
| |
| − | |leaf count=2;4
| |
| − | |leaf fragility=delicate
| |
| − | |leaf reproduction=vegetative
| |
| − | |leaf shape=like
| |
| − | |leaf texture=papery
| |
| − | |margin architecture or shape=dentate;dentate
| |
| − | |margin coloration=slightly transparent;green
| |
| − | |margin shape=denticulate
| |
| − | |mat density=diffuse
| |
| − | |median leaf length=2mm;2.7mm
| |
| − | |median leaf shape=lanceolate;linear-lanceolate
| |
| − | |median leaf width=0.6mm;0.8mm
| |
| − | |megasporangium count=1
| |
| − | |megasporangium position=basal
| |
| − | |megasporophyll arrangement or shape=lanceolate-elliptic
| |
| − | |megasporophyll count=1
| |
| − | |megasporophyll shape=falcate-lanceolate
| |
| − | |megasporophyll size=smaller;larger
| |
| − | |microsporophyll shape=lanceolate;narrowly ovatelanceolate
| |
| − | |outer auricle size=small
| |
| − | |plant growth form or habitat=terrestrial
| |
| − | |rhizophore diameter=1mm;3mm
| |
| − | |sporophyll architecture or shape=dentate
| |
| − | |sporophyll shape=like;tapering;keeled
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| − | |stem architecture=branched
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| − | |stem growth form or orientation=long-creeping
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| − | |strobilus architecture or arrangement or growth form=solitary
| |
| − | |strobilus some measurement=0.2cm;2.5cm
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| | -->[[Category:Treatment]][[Category:Selaginella subg. Stachygynandrum]] | | -->[[Category:Treatment]][[Category:Selaginella subg. Stachygynandrum]] |
Plants terrestrial, forming diffuse mats. Stems long-creeping, branched, branches 3-forked, flat, articulate, glabrous. Rhizophores borne on upperside of stems throughout stem length, 1–3 mm diam. Leaves delicate, papery. Lateral leaves nearly perpendicular to stem, well spaced, green, lanceolate, 2.5–3.6 × 0.8–1.2 mm; base rounded; margins slightly transparent to green, dentate; apex acute. Median leaves lanceolate to linear-lanceolate, 2–2.7 × 0.6–0.8 mm; base with small outer auricle; margins slightly transparent to green, dentate; apex acuminate. Strobili solitary, 0.2–2.5 cm, with only 1 megasporangium, megasporangium basal; sporophylls keeled, dentate, strongly tapering toward apex, base glabrous, margins denticulate, apex acuminate; megasporophylls larger than microsporophylls, in groups of 4, 2 like vegetative leaves, 2 like sporophylls, of the latter 1 large, lanceolate-elliptic, 1 smaller, falcate-lanceolate; microsporophylls lanceolate to narrowly ovate-lanceolate. 2n = 20.
Habitat: Moist areas, riverbanks, lake margins, lawns
Elevation: 0–50 m
Discussion
Selaginella kraussiana has escaped from cultivation and is naturalized in central Georgia, and probably farther south and west. It has been reported as far north as coastal central California and northern Virginia (D. B. Lellinger 1985), but I have not seen specimens from these areas. Selaginella kraussiana is frequently cultivated and has several cultivars. It is widely used in morphologic and anatomic research and for teaching purposes. This species belongs to the series Articulatae Spring, a very distinct group of heterophyllous selaginellas with rhizophores on the upper side of the stem, special microsporangium type and dehiscence (P. Somers 1982), basal megasporangia, the largest megaspores in the genus, mostly spiny microspores, and usually more than one meristele. These and other characteristics suggest that series Articulatae probably deserves subgeneric ranking.
Selected References
None.
