Isoetes cristata C.R.Marsden & Chinnock

Species

Pteridophytes > Isoetales > Isoetaceae > Isoetes

Characteristics

Small amphibious herb; corm 2-lobed, 5–10 mm long. Leaves to 65, spirally arranged, erect-patent, 6–10 cm long, 0.8–1.5 mm diam., flexible, bright green; base 4–5 mm wide, narrowly winged, white, translucent; peripheral fibre strands and internal hairs absent; stomata present apically; trans-lacunar diaphragms visible; ligule triangular, 1 mm long; labium minute. Sporangia elliptic, 2.5–4 mm long, 1.5–2.5 mm wide, translucent; velum covering 5–15% of sporangium. Microspores unknown. Megaspores Types I and IIA, 0.25–0.46 mm diam.; each proximal face with 1 (rarely 2 or 3) very large tubercles; distal face with broad anastomosing wavy ridges, drying white or grey.
Life form perennial
Growth form herb
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Sexuality dioecy
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Environment

Growing in a Lophostemon lactiflua /Asteromyrtus symphyocarpa swamp in 15 cm of water.
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Usage

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Cultivation

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Distribution

Isoetes cristata world distribution map, present in Australia

Identifiers

LSID urn:lsid:ipni.org:names:17571520-1
WFO ID wfo-0001328505
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Wikipedia (EN)
Wikipedia (FR)

Synonyms

Isoetes cristata