Isoetes toximontana (Isoetaceae), a New Quillwort with Green Megaspores from the Northern Cape of South Africa

Isoetes toximontana is only the second quillwort reported from the Northern Cape region in South Africa. It occurs in shallow water on the Gifberg. Megaspores are uniformly tuberculate on the proximal surface; their distal surfaces may have occasional rugi along with bullae. They are olive green whe...

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Bibliographic Details
Published in:Novon (Saint Louis, Mo.) Mo.), 2002-12, Vol.12 (4), p.504-507
Main Authors: Musselman, Lytton John, Roux, J. P.
Format: Article
Language:English
Subjects:
Epidermal cells
Ferns
Megaspores
Microspores
Plants
Rootstocks
Roux
Spores
Stomata
Taxa
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Summary:Isoetes toximontana is only the second quillwort reported from the Northern Cape region in South Africa. It occurs in shallow water on the Gifberg. Megaspores are uniformly tuberculate on the proximal surface; their distal surfaces may have occasional rugi along with bullae. They are olive green when dry. Microspores are brown and aculeate. Preliminary field studies suggest that an unexpected diversity of quillworts is found in this region.
ISSN:1055-3177
DOI:10.2307/3393131