Checklist of Mangrove species of South East India and Sri Lanka

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Acrostichum aureum L. - PTERIDACEAE - Filicopsida

Synonymes : Acrostichum longifolium Willd.

Common name in Tamil : Minni
Common name in Singhalese : Karen koku

Habit -  Juliana PROSPERI - IFP Adult plant -  Juliana PROSPERI - IFP Young plant -  Juliana PROSPERI - IFP Mature leaves -  Juliana PROSPERI - IFP Mature fronds -  Juliana PROSPERI - IFP Young frond -  Juliana PROSPERI - IFP Venation -  Juliana PROSPERI - IFP Fertile fronds -  Juliana PROSPERI - IFP Fertile frond -  Juliana PROSPERI - IFP Sori on a fertile frond -  Juliana PROSPERI - IFP Young frond -  Juliana PROSPERI - IFP Young sporophyte -  Juliana PROSPERI - IFP

Diagnostic characters Botany & morphology Regeneration Reproductive biology Ecology Distribution Uses

Diagnostic characters :

Mangrove fern, terestrial, erect, 1 2 m tall. Fronds (leaves of ferns) are pinnate and leathery, sori are found at the extremity of apical pinnae, along the veins.

Botany & morphology :

Fronds once-pinnate; leaflet 8 - 14, alternate, linear-oblong, retusely mucronate at apex, cuneate at base, entire, venation reticulate with uniform elongate areoles diverging from the thickened midrib without free vein endings.

Fertile fronds only on upper leaflet, lowest leaflet always distant, long stalked. Sori densely aggregated along the undersurface, non-indusiate.

Scales broad, restricted at the base of fronds.

Stipes are woody, glabrous, arising from a stout woody rhizome.

Regeneration :

Vegetative propagation through rhizhomatus roots; new individuals also develop from spores via gametophytes, especially in disturbed sites.

Reproductive biology :

Germination of spores seems most successful in fresh water. Sex-organ (antheridia and archegonia) ontogeny occurs in sequence so that out crossing is promoted.

Ecology :

It is a strong weedy and aggressive species occurs in back mangroves and associated tidally influenced estuarine. Light-tolerant or even light-demanding species. It can survive without regular tidal inundation.

Distribution :

It is a strong weedy and aggressive species occurs in back mangroves and associated tidally influenced estuarine. Light-tolerant or even light-demanding species. It can survive without regular tidal inundation.

Uses :

Rhizome is used as medicine for wounds and boils; fronds are used as antidote for snake bite; litter for cattle and roof thatching.

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