Nymphoides parvifolia

Nymphoides parvifolia (Wall. ex Griseb.) Kuntze (syn: Limnanthemum moonii Thw.; Limnanthemum parvifolium Wall. ex Griseb.; Limnanthemum tenellum Sm. ex C. B. Cl.; Menyanthes campestris Moon; Nymphoides parvifolia var. moonii Clarke; Villarsia parvifolia Wall.) as per Catalogue of Life;
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Australia (Western Australia, Northern Territory, Queensland), Java, S-India, peninsular Malaysia (scattered), Myanmar [Burma] (Bago, Taninthayi), Sri Lanka, Vietnam as per Catalogue of Life;
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Andorra; Australia; Bangladesh; Belgium; Canada; Egypt; Guernsey; India (Andhra Pradesh, Karnataka, Kerala, Madhya Pradesh, Rajasthan, Tamil Nadu, West Bengal); Malaysia; Morocco; Nepal; Serbia; Spain; Sri Lanka; Sweden; Thailand; United States; Viet Nam as per IUCN Red List (LC) ;
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Annual or perennial, rhizomatous herbs; rhizome short, obconical. Branches all fertile, very slender, petiole-like, uniphyllous, 8-20 cm long. Leaves dimorphic; sterile leaves many, in a basal rosette, submerged; petiole 2-4 cm long, often winged; lamina spathulate, to 3 cm x 1.5 cm; fertile leaves solitary at the apices of capilliform branches, floating, ovate-orbicular, rounded or obtuse at apex, deeply cordate at base with narrow sinuses, to 4 cm x 3 cm, membranous, entire, green; petiole 2-5 mm long. Flowers bisexual, homostylous in umbellate clusters of 4-8 at the junction of the petiole and the branches. Calyx deeply 4(-5) lobed; lobes oblong-acute, to 2 mm x 1 mm, pinkish at apex, hyaline at margin. Corolla white with a yellow throat; tube 2-3 mm, with a ring of hyaline hairs at the throat; lobes 4 (-5), oblong or elliptic, 3-5 mm long, margins fimbriately toothed towards the apex. Stamens as many as corolla lobes, inserted below the throat; filaments 1-1.5 mm long, alternating with minute, stalked tufts of white, glandular hairs. Pistil bottle-shaped with 4-5 disc glands below; style short, but distinct; stigma bilobed. Capsules ellipsoid, apiculate, torulose when ripe, longer than the fruiting calyx; seeds 8-15 in each capsule, light brown, discoid, to 1 mm across; surface tuberculate; testa cells foveolate with sinuate and faintly raised junctures.

Flowering and fruiting: July-October
Shallow ponds and paddy fields
Indo-Malesia to Australia
(Attributions- Dr. N Sasidharan (Dr. B P Pal Fellow), Kerala Forest Research Institute, Peechi from India Biodiversity Portal)
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Help in Id : 6 posts by 3 authors. Attachments (3)
Please identify this small aquatic/ sub-aquatic herb, growing on partial water logged soil, leaf is 1.5 cm in length and 1.4 cm width on average. Not common in the locality.

It may be Nymphoides hydrophylla (= N. cristata) (CRESTED SNOWFLAKES)
Ref. Common Indian Wild Flowers by Isaac Kehimkar.

I think some ‎Nymphoides but not matching with Nymphoides hydrophylla, Nymphoides indica, or Nymphoides peltata

Out of these three species in efi, it is closer to Nymphoides indica

N. indica (paniseuri, Ass.) for me….

Thank You very much. I shall make a comparative study of the Nymphoides indica and the present specimen.

To me looks closer to Nymphoides parvifolia as per the following:
Rare_and_Interesting Distribution of_Nymphoides parvifolia Griseb Kuntze_Menyanthaceae_from Eastern_ghats Orissa_India
May I request … to pl. confirm.
I do not know if it has been reported earlier from Assam as it has been published by our member … from Orissa as per reference given in the links above.
It has also been reported from Bangladesh as per Indian Biodiversity Portal (Indo- Malesia to Australia)