Difference between revisions of "Isoëtes prototypus"
Canad. J. Bot. 69: 278. 1991.
Common names: Prototype quillwort
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>aquatic, submerged. <b>Rootstock</b> nearly globose, 2-lobed. <b>Leaves</b> evergreen, dark green, pale reddish brown toward base, spirally arranged, to 12 cm, rigid, gradually tapering to tip. <b>Velum</b> covering entire sporangium. <b>Sporangium</b> wall unpigmented, entirely enclosed in translucent saccate membrane. <b>Megaspores</b> white, 425–575 µm diam., obscurely rugulate with molded and wavy ridges; girdle obscure. <b>Microspores</b> light brown in mass, 24–32 µm, spinulose. <b>2n</b> = 22.</span><!-- |
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| + | |phenology=Spores mature in summer. | ||
|habitat=Deep water of cold, oligotrophic, acidic lakes | |habitat=Deep water of cold, oligotrophic, acidic lakes | ||
|distribution=N.B.;N.S.;Maine. | |distribution=N.B.;N.S.;Maine. | ||
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name=Isoëtes prototypus | name=Isoëtes prototypus | ||
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|authority=D. M. Britton | |authority=D. M. Britton | ||
|rank=species | |rank=species | ||
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|basionyms= | |basionyms= | ||
|family=Isoëtaceae | |family=Isoëtaceae | ||
| + | |phenology=Spores mature in summer. | ||
|habitat=Deep water of cold, oligotrophic, acidic lakes | |habitat=Deep water of cold, oligotrophic, acidic lakes | ||
|distribution=N.B.;N.S.;Maine. | |distribution=N.B.;N.S.;Maine. | ||
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|publication year=1991 | |publication year=1991 | ||
|special status= | |special status= | ||
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|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes prototypus | |species=Isoëtes prototypus | ||
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Latest revision as of 21:24, 5 November 2020
Plants aquatic, submerged. Rootstock nearly globose, 2-lobed. Leaves evergreen, dark green, pale reddish brown toward base, spirally arranged, to 12 cm, rigid, gradually tapering to tip. Velum covering entire sporangium. Sporangium wall unpigmented, entirely enclosed in translucent saccate membrane. Megaspores white, 425–575 µm diam., obscurely rugulate with molded and wavy ridges; girdle obscure. Microspores light brown in mass, 24–32 µm, spinulose. 2n = 22.
Phenology: Spores mature in summer.
Habitat: Deep water of cold, oligotrophic, acidic lakes
Distribution
N.B., N.S., Maine.
Discussion
Of conservation concern.
Selected References
None.
Lower Taxa
None.