Difference between revisions of "Isoëtes maritima"
Bot. Gaz. 13: 94. 1888..
Common names: Maritime quillwort
Synonyms: Isoëtes beringgensis Komarov Isoëtes echinospora subsp. maritima (L. Underwood) A. Löve Isoëtes echinospora var. maritima (L. Underwood) A. A. Eaton Isoëtes macounii unknown
Treatment appears in FNA Volume 2.
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Revision as of 18:57, 24 September 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.