Difference between revisions of "Isoëtes georgiana"
Amer. Fern. J. 82: 24. 1992.
FNA>Volume Importer |
FNA>Volume Importer |
||
| Line 23: | Line 23: | ||
|habitat=Creeks | |habitat=Creeks | ||
|distribution=Ga. | |distribution=Ga. | ||
| − | |discussion=<p>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.</p><!-- | + | |discussion=<p><i>Isoëtes georgiana</i> is known only from Worth County, Georgia. An early collection from this locality was reported by B. M. Boom (1982) to be <i>I. engelmannii</i> x piedmontana, but the broad velum and bold texture of the megaspores suggest a possible involvement of <i>I. flaccida</i>.</p><!-- |
--><p>Of conservation concern.</p> | --><p>Of conservation concern.</p> | ||
|tables= | |tables= | ||
| Line 47: | Line 47: | ||
|publication year=1992 | |publication year=1992 | ||
|special status= | |special status= | ||
| − | |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/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V2/V2_309.xml |
|genus=Isoëtes | |genus=Isoëtes | ||
|species=Isoëtes georgiana | |species=Isoëtes georgiana | ||
Revision as of 15:47, 18 September 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.