Difference between revisions of "Isoëtes maritima"
Bot. Gaz. 13: 94. 1888..
Common names: Maritime quillwort
Synonyms: Isoëtes beringgensis KomarovIsoëtes echinospora subsp. maritima (L. Underwood) A. LöveIsoëtes echinospora var. maritima (L. Underwood) A. A. EatonIsoëtes macounii unknown
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plant </b>usually aquatic, occasionally emergent. <b>Rootstock</b> nearly globose, 2-lobed. <b>Leaves</b> ± deciduous, bright green, pale toward base, spirally arranged, to 12 cm, pliant, gradually tapering toward tip. <b>Velum</b> covering less than 1/2 of sporangium. <b>Sporangium</b> wall ± brown-streaked. <b>Megaspores</b> whtie, 380–600 μm diam., echinate to short-cristate with stout blunt spines and crests; girdle densely echinate. <b>Microspores</b> gray to brown in mass, 30–40 μm, papillose. <b>2n</b> = 44.</span><!-- |
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| + | |phenology=Spores mature late summer. | ||
|habitat=Lakes and streams | |habitat=Lakes and streams | ||
|distribution=B.C.;Alaska;Wash. | |distribution=B.C.;Alaska;Wash. | ||
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|family=Isoëtaceae | |family=Isoëtaceae | ||
| + | |phenology=Spores mature late summer. | ||
|habitat=Lakes and streams | |habitat=Lakes and streams | ||
|distribution=B.C.;Alaska;Wash. | |distribution=B.C.;Alaska;Wash. | ||
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|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes maritima | |species=Isoëtes maritima | ||
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Revision as of 13:23, 27 July 2019
Plant usually aquatic, occasionally emergent. Rootstock nearly globose, 2-lobed. Leaves ± deciduous, bright green, pale toward base, spirally arranged, to 12 cm, pliant, gradually tapering toward tip. Velum covering less than 1/2 of sporangium. Sporangium wall ± brown-streaked. Megaspores whtie, 380–600 μm diam., echinate to short-cristate with stout blunt spines and crests; girdle densely echinate. Microspores gray to brown in mass, 30–40 μm, papillose. 2n = 44.
Phenology: Spores mature late summer.
Habitat: Lakes and streams
Distribution
B.C., Alaska, Wash.
Discussion
Isoëtes maritima hybridizes with I. echinospora and I. occidentalis [ = I. truncata (A. A. Eaton) Clute].
Selected References
None.
Lower Taxa
None.