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Helminthostachys Kaulf.

Helminthostachys (en)

Genus

Pteridophytes > Ophioglossales > Ophioglossaceae

Characteristics

Plants medium-sized, terrestrial, evergreen. Rhizomes shortly creeping, dorsiventral with fronds in 2 rows on dorsal side; buds glabrous; roots thick. Fronds solitary, sterile lamina perpendicular to common stipe, ternate with large basal pinnae divided into few pinnules, thus appearing palmately dissected as a whole; veins free, forked into parallel close veinlets. Sporophore attached at base of sterile lamina, spikelike, cylindrical; sporangia globose, born in pseudowhorls on radially arranged stalked clusters interspersed with small sterile projections. Spores trilete, globose, surface reticulate, with delicate projections ± fused baculate. n = 94.
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Terrestrial fern, with a creeping rhizome bearing thick fleshy roots. Frond consisting of a common basal stipe, with 2 rounded stipules at the base, a palmately-divided sterile lamina and an erect sporophore projecting above the lamina and consisting of numerous crowded short lateral sporangiate branches; sporangia large, globose, opening by a vertical slit. Spores granular, yellow.
Fertile segment of frond compact, with many short branches; sterile segment tripartite, each part with few leaflets
Life form perennial
Growth form herb
Growth support -
Foliage retention evergreen
Sexuality -
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Root system creeping-root rhizome
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Nitrogen fixer -
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Environment

Light -
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Hardiness (USDA) 8-12

Usage

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Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

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Images

Helminthostachys unspecified picture

Distribution

Helminthostachys world distribution map, present in Australia, China, and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:17116640-1
WFO ID wfo-4000017297
COL ID 637FK
BDTFX ID -
INPN ID 672638
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Botryopteris Helminthostachys Ophiala

Lower taxons

Helminthostachys zeylanica
WorldFloraDB 2024