BSI Flora of India with details & keys (Volume 3- 1993) (Jayashree Bhattacharya):

Elatine ambigua Wight in Hook. (India: In patches in moist areas along the river banks and margins of the tanks; sometimes also in inundated rice fields. Jammu & Kashmir, Madhya Pradesh, Maharashtra, Andhra Pradesh, Karnataka, Tamil Nadu and Kerala; Europe, N. America, Indonesia(Java), Fiji Island and Polynesia)
Elatine gracilis Mason (India: In marshy sandy alluvial soils near lakes at ca 1387 m. Himachal Pradesh; N. America)
Elatine triandra Schkuhr (India: In shallow inundated areas, often in marshy situations along margins of ponds and tanks, between 100 and 2800 m. Jammu & Kashmir, Himachal Pradesh, Andhra Pradesh and Tamil Nadu; Tropical Asia, Australia, New Zealand, Europe and N. America)


Binomial Habit Notes References Distribution

Prostrate Herb Plains, Marsh
Flora of Tamil
Nadu, VOL. I, 1983
Salem, Thiruvallur, Tiruchchirappalli
Elatine triandra Schkuhr Prostrate
of Tamil Nadu, VOL. I, 1983

Elatine triandra Schkuhr (N. Africa, Europe, Nepal, ?India, Temperate Asia east to China, Korea and Japan)

Elatine ambigua Wight in Hooker [Bhutan, India, Indonesia, Malaysia, Vietnam; naturalized in Australia, Europe, and North America (California)].
Elatine triandra Schkuhr [India, Indonesia, Japan, Malaysia, Nepal, Philippines; Australia, Europe, North America, Pacific islands (New Zealand)].

An Excursion Flora of Central Tamilnadu, India By K. M. Matthew (1995)- Details-
Elatine (‎Elatinaceae) : 2 posts by 2 authors.

I have updated eFI (efloraofindia) page on Elatine (Pl. click).

Attempts have been made to incorporate most of the species available in India & nearby areas with details & keys directly or through links as far as possible. It’s quite possible that there may be some discrepancy in the accepted names & synonyms taken from other links.

Species discussed so far in efloraofindia are given at the bottom of the page in the form of links against Subpages. On clicking them one can see all the details.

Any comments/ corrections are welcome.