A New Species of Diploid Quillwort (Isoetes, Isoetaceae, Lycophyta) from Lebanon

A New Species of Diploid Quillwort (Isoetes, Isoetaceae, Lycophyta) from Lebanon

A new species, Isoetes libanotica Musselman, Bolin & R. D. Bray (Isoetaceae, Lycophyta), is described from Akkar District of northern Lebanon. It is a seasonal terrestrial species of basaltic soils, diploid (2n = 22), with complete velum coverage. Megaspore diameter ranges from 338 to 477 μm wit...

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Veröffentlicht in:Novon (Saint Louis, Mo.) Mo.), 2011-09, Vol.21 (3), p.295-298
Hauptverfasser: Bolin, Jay F, Bray, Rebecca D, Musselman, Lytton John
Format: Artikel
Sprache:eng
Schlagworte:
Alveolates
Biological taxonomies
Diploids
Diploidy
Girdles
Isoetaceae
Isoetes
IUCN Red List
Lebanon
Lycophyta
Megaspores
Microspores
New species
Plants
Ploidies
Rootstocks
Soil
Sympatric populations
Taxa
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Beschreibung
Zusammenfassung:A new species, Isoetes libanotica Musselman, Bolin & R. D. Bray (Isoetaceae, Lycophyta), is described from Akkar District of northern Lebanon. It is a seasonal terrestrial species of basaltic soils, diploid (2n = 22), with complete velum coverage. Megaspore diameter ranges from 338 to 477 μm with remote, low tuberculate ornamentation and a low to obsolete equatorial girdle; microspore length ranges from 25 to 30 μm, with echinate ornamentation. At the type locality of I. libanotica, two other Isoetes L. species occur sympatrically. These superficially similar Isoetes species can be differentiated from I. libanotica using megaspore characters; I. duriei Bory has larger alveolate megaspores and I. olympica A. Braun has a prominent equatorial girdle.
ISSN:1055-3177
1945-6174
DOI:10.3417/2010028