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Ophioglossum petiolatum Hook.

Longstem adderstongue (en)

Species

Pteridophytes > Ophioglossales > Ophioglossaceae > Ophioglossoideae > Ophioglossum

Characteristics

Roots dark brown, to 8 per plant, 0.8-1.3 mm diam., producing proliferations. Stem upright, 0.3-1 cm, 1.5-2.  diam., 2-3 leaves per stem. Trophophore stalk 0-3mm, 0-0.1 times length of blade. Trophophore blade erect to spreading, usually plane or nearly so when alive, gray-green, dull, ovate to trowel-shaped, to 6 × 3cm, fleshy, cuneate to truncate to nearly cordate at base, contracted gradually to acute apex, apiculum mostly absent; venation coarse, reticulate, areoles large with few free or anastomosing included veinlets. Sporophores arising at ground level, 0.8-7 times length of trophophore; sporangial clusters to 4 × 0.35 cm, with up to 30 pairs of sporangia, apiculum 0.3-1.2 mm.
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Plants 15-25 cm tall. Rhizomes erect, bearing a cluster of thick fleshy roots; roots extending horizontally like stolons, producing a new plant from apical bud. Fronds simple; common stalk 9-15 cm. Sterile lamina sessile, ovate to broadly ovate, 3-6 × 2-3 cm, herbaceous, base ± elongated and rounded, apex acute or obtuse; veins fairly distinct, reticulate. Sporophore arising from base of sterile lamina, 6-9 cm; linear spike 2.5-3 cm. Spore surface obviously subreticulate with fine granules. 2n = 960-1100.
A small fern. It grows 6 cm tall and has creeping rhizomes. The fronds are 3-6 cm long.
Life form perennial
Growth form herb
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Mature height (meter) 0.11 - 0.16
Root system rhizome
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Nitrogen fixer -
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Environment

It is a subtropical plant. It grows in sandy places and shaded areas.
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Hardiness (USDA) 7-12

Usage

The leaves are eaten as a vegetable.
Uses medicinal
Edible leaves
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Animal toxicity -

Cultivation

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Distribution

Ophioglossum petiolatum world distribution map, present in American Samoa, Australia, Bangladesh, Bhutan, China, Micronesia (Federated States of), Indonesia, India, Japan, Cambodia, Sri Lanka, Myanmar, Malaysia, Niue, Nepal, New Zealand, Pakistan, Philippines, Papua New Guinea, Solomon Islands, Thailand, Taiwan, Province of China, United States of America, Viet Nam, and Samoa

Identifiers

LSID urn:lsid:ipni.org:names:17167890-1
WFO ID wfo-0001109041
COL ID 74P3Y
BDTFX ID -
INPN ID 672418
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Ophioglossum cognatum Ophioglossum elongatum Ophioglossum namegatae Ophioglossum petiolatum Ophioglossum floridanum Ophioglossum littorale Ophioglossum moluccanum
WorldFloraDB 2024