Difference between revisions of "Isoëtes tuckermanii"

A. Braun ex Engelmann in A. Gray

in A. Gray,Manual ed. 5 676. 1867.

Common names: Tuckerman's quillwort isoète de Tuckerman
Treatment appears in FNA Volume 2.
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--><span class="statement" id="st-d0_s0" data-properties="plant growth form or habitat;plant location"><b>Plants </b>aquatic, occasionally emergent.</span> <span class="statement" id="st-d0_s1" data-properties="rootstock shape;rootstock shape"><b>Rootstock </b>nearly globose 2 (–3) -lobed.</span> <span class="statement" id="st-d0_s2" data-properties="leaf duration;leaf coloration;leaf coloration;leaf coloration;leaf coloration;leaf arrangement;leaf some measurement;leaf texture;leaf texture;leaf texture;leaf shape"><b>Leaves </b>evergreen, olive green to reddish-brown, pale toward base, spirally arranged, to 20 cm, pliant to rigid, gradually tapering to tip.</span> <span class="statement" id="st-d0_s3" data-properties="velum position relational;velum count"><b>Velum </b>covering less than 1/2 of sporangium.</span> <span class="statement" id="st-d0_s4" data-properties="sporangium wall coloration"><b>Sporangium </b>wall brown-streaked.</span> <span class="statement" id="st-d0_s5" data-properties="megaspore coloration;megaspore diameter;megaspore architecture or coloration or relief;crest architecture or course;crest relief or texture"><b>Megaspores </b>white, 450–650 μm diam., reticulate with ridges having irregular and roughened crests;</span> <span class="statement" id="st-d0_s6" data-properties="girdle relief">girdle densely papillate.</span> <span class="statement" id="st-d0_s7" data-properties=""><b>Microspores </b>gray in mass, 25–35 μm, spinulose.</span> <span class="statement" id="st-d0_s8" data-properties="microspore coloration;microspore some measurement;microspore architecture or shape;2n chromosome count">2n = 44.</span><!--
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--><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>aquatic, occasionally emergent. <b>Rootstock</b> nearly globose 2(–3)-lobed. <b>Leaves</b> evergreen, olive green to reddish brown, pale toward base, spirally arranged, to 20 cm, pliant to rigid, gradually tapering to tip. <b>Velum</b> covering less than 1/2 of sporangium. <b>Sporangium</b> wall brown-streaked. <b>Megaspores</b> white, 450–650 μm diam., reticulate with ridges having irregular and roughened crests; girdle densely papillate. <b>Microspores</b> gray in mass, 25–35 μm, spinulose. <b>2n</b> = 44.</span><!--
  
 
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|phenology=Spores mature in late summer.
 
|habitat=Slightly acid lakes, ponds, and streams
 
|habitat=Slightly acid lakes, ponds, and streams
 
|distribution=N.B.;Nfld.;N.S.;Ont.;Que.;Conn.;Maine;Mass.;N.H.;N.J.;N.Y.;R.I.;Vt.
 
|distribution=N.B.;Nfld.;N.S.;Ont.;Que.;Conn.;Maine;Mass.;N.H.;N.J.;N.Y.;R.I.;Vt.
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|basionyms=
 
|basionyms=
 
|family=Isoëtaceae
 
|family=Isoëtaceae
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|phenology=Spores mature in late summer.
 
|habitat=Slightly acid lakes, ponds, and streams
 
|habitat=Slightly acid lakes, ponds, and streams
 
|distribution=N.B.;Nfld.;N.S.;Ont.;Que.;Conn.;Maine;Mass.;N.H.;N.J.;N.Y.;R.I.;Vt.
 
|distribution=N.B.;Nfld.;N.S.;Ont.;Que.;Conn.;Maine;Mass.;N.H.;N.J.;N.Y.;R.I.;Vt.
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|publication year=1867
 
|publication year=1867
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/287ef3db526bd807d435a3c7423ef2df1e951227/V2/V2_671.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_671.xml
 
|genus=Isoëtes
 
|genus=Isoëtes
 
|species=Isoëtes tuckermanii
 
|species=Isoëtes tuckermanii
|2n chromosome count=44
 
|crest architecture or course=irregular
 
|crest relief or texture=roughened
 
|girdle relief=papillate
 
|leaf arrangement=arranged
 
|leaf coloration=pale;olive green;reddish-brown
 
|leaf duration=evergreen
 
|leaf shape=tapering
 
|leaf some measurement=0cm;20cm
 
|leaf texture=pliant;rigid
 
|megaspore architecture or coloration or relief=reticulate
 
|megaspore coloration=white
 
|megaspore diameter=450um;650um
 
|microspore architecture or shape=spinulose
 
|microspore coloration=gray
 
|microspore some measurement=25um;35um
 
|plant growth form or habitat=aquatic
 
|plant location=emergent
 
|rootstock shape=2(-3)-lobed;globose
 
|sporangium wall coloration=brown-streaked
 
|velum count=0;1/2
 
|velum position relational=covering
 
 
}}<!--
 
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-->[[Category:Treatment]][[Category:Isoëtes]]
 
-->[[Category:Treatment]][[Category:Isoëtes]]

Revision as of 14:25, 27 July 2019

Plants aquatic, occasionally emergent. Rootstock nearly globose 2(–3)-lobed. Leaves evergreen, olive green to reddish brown, pale toward base, spirally arranged, to 20 cm, pliant to rigid, gradually tapering to tip. Velum covering less than 1/2 of sporangium. Sporangium wall brown-streaked. Megaspores white, 450–650 μm diam., reticulate with ridges having irregular and roughened crests; girdle densely papillate. Microspores gray in mass, 25–35 μm, spinulose. 2n = 44.


Phenology: Spores mature in late summer.
Habitat: Slightly acid lakes, ponds, and streams

Distribution

V2 671-distribution-map.gif

N.B., Nfld., N.S., Ont., Que., Conn., Maine, Mass., N.H., N.J., N.Y., R.I., Vt.

Discussion

Isoëtes tuckermanii may be an allotetraploid like I. riparia, but it appears to have had different parental species. Variation may also have resulted from multiple allotetraploid origins. Typical plants of I. tuckermanii have thin, soft leaves. More northern plants, referred to as I. tuckermanii var. borealis A. A. Eaton, have thick, stiff leaves.

Isoëtes tuckermanii hybridizes with I. echinospora; I. engelmannii [ = I. x foveolata A. A. Eaton ex Dodge]; and I. lacustris [ = I. x harveyi A. A. Eaton].

Selected References

None.

Lower Taxa

None.
... more about "Isoëtes tuckermanii"
W. Carl Taylor +, Neil T. Luebke +, Donald M. Britton +, R. James Hickey +  and Daniel F. Brunton +
A. Braun ex Engelmann in A. Gray +
Tuckerman's quillwort +  and isoète de Tuckerman +
N.B. +, Nfld. +, N.S. +, Ont. +, Que. +, Conn. +, Maine +, Mass. +, N.H. +, N.J. +, N.Y. +, R.I. +  and Vt. +
Slightly acid lakes, ponds, and streams +
Spores mature in late summer. +
in A. Gray,Manual ed. 5 +
Isoëtes tuckermanii +
Isoëtes +
species +