Isoetes tennesseensis (Isoetaceae), an Octoploid Quillwort from Tennessee

Isoetes tennesseensis (Isoetaceae), an Octoploid Quillwort from Tennessee

Isoetes tennesseensis, an octoploid species with a chromosome count of 2n = 88, is described. It occurs in the Hiwassee River in Tennessee. Past collections of this species have been misidentified as Isoetes macrospora (= I. lacustris). Isoetes tennesseensis differs from I. lacustris in chromosome n...

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Veröffentlicht in:American fern journal 2003-10, Vol.93 (4), p.184-190
Hauptverfasser: Luebke, N T, Budke, J M
Format: Artikel
Sprache:eng
Schlagworte:
Freshwater
Isoetaceae
Isoetes lacustris
Isoetes tennesseensis
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Beschreibung
Zusammenfassung:Isoetes tennesseensis, an octoploid species with a chromosome count of 2n = 88, is described. It occurs in the Hiwassee River in Tennessee. Past collections of this species have been misidentified as Isoetes macrospora (= I. lacustris). Isoetes tennesseensis differs from I. lacustris in chromosome number, megaspore and microspore morphology and distribution. Speculation on the origin of this new species is presented.
ISSN:0002-8444
DOI:10.1043/0002-8444(2003)093(0184:ITIAOQ)2.0.CO;2