Difference between revisions of "Isoëtes georgiana"
Amer. Fern. J. 82: 24. 1992.
Common names: Georgia 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, emergent. <b>Rootstock</b> nearly globose, 2-lobed. <b>Leaves</b> deciduous, olive green, pale toward base, spirally arranged, to 40 cm., pliant, gradually tapering toward tip. <b>Velum</b> covering less that 3/4 of sporangium. <b>Sporangium</b> wall ± brown-streaked. <b>Megaspores</b> white, 450–650 μm diam., cristate to reticulate with broad, jagged ridges; girdle obscure. <b>Microspores</b> light brown in mass, 23–33 μm, papillose. <b>2n</b> = 66.</span><!-- |
-->{{Treatment/Body | -->{{Treatment/Body | ||
| + | |phenology=Spores mature late summer. | ||
|habitat=Creeks | |habitat=Creeks | ||
|distribution=Ga. | |distribution=Ga. | ||
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|basionyms= | |basionyms= | ||
|family=Isoëtaceae | |family=Isoëtaceae | ||
| + | |phenology=Spores mature late summer. | ||
|habitat=Creeks | |habitat=Creeks | ||
|distribution=Ga. | |distribution=Ga. | ||
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|publication year=1992 | |publication year=1992 | ||
|special status= | |special status= | ||
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|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes georgiana | |species=Isoëtes georgiana | ||
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Revision as of 13:16, 27 July 2019
Plants aquatic, emergent. Rootstock nearly globose, 2-lobed. Leaves deciduous, olive green, pale toward base, spirally arranged, to 40 cm., pliant, gradually tapering toward tip. Velum covering less that 3/4 of sporangium. Sporangium wall ± brown-streaked. Megaspores white, 450–650 μm diam., cristate to reticulate with broad, jagged ridges; girdle obscure. Microspores light brown in mass, 23–33 μm, papillose. 2n = 66.
Phenology: Spores mature late summer.
Habitat: Creeks
Discussion
Isoëtes georgiana is known only from Worth County, Georgia. An early collection from this locality was reported by B. M. Boom (1982) to be I. engelmannii x piedmontana, but the broad velum and bold texture of the megaspores suggest a possible involvement of I. flaccida.
Of conservation concern.
Selected References
None.
Lower Taxa
None.