Difference between revisions of "Isoëtes virginica"
Claytonia 3: 29. 1937.
Common names: Virginia quillwort
Synonyms: Isoëtes virginica var. piedmontana N. E. Pfeiffer Isoëtes piedmontana
Treatment appears in FNA Volume 2.
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V2/V2_253.xml |
|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes virginica | |species=Isoëtes virginica | ||
Revision as of 20:49, 16 December 2019
Plants becoming terrestrial. Rootstock nearly globose, 2-lobed. Leaves deciduous, dull green, pale to dark brown toward base, spirally arranged, less than 30 cm, pliant, gradually tapering to tip. Velum covering less than 1/3 of sporangium. Sporangium wall brown-streaked to completely brown. Megaspores white, 400–480 μm diam., boldly tuberculate to rugulate with cristate, occasionally branched to anastomosing ridges; girdle obscure. Microspores light brown in mass, 27–33 μm, spinulose. 2n = 22, 44.
Phenology: Spores mature late in spring–early summer.
Habitat: Mud flats and depressions on and around granite outcrops
Distribution
Ala., Ga., S.C., Va.
Discussion
Short plants with 15 to 50 leaves and a tendency toward lower and more open megaspore ornamentation have been called Isoëtes virginica var. piedmontana Pfeiffer.
Selected References
None.
Lower Taxa
None.