Ceratopteris thalictroides subsp. gaudichaudii (Brongn.) Fraser-Jenkins & Pariyar (syn: Ceratopteris gaudichaudii Brongn.; Ceratopteris gaudichaudii var. vulgaris Masuyama & Watano);
Himalaya to Japan and Indo-China: Assam, Bangladesh, China North-Central, China South-Central, China Southeast, East Himalaya, India, Japan, Korea, Myanmar, Nansei-shoto, Nepal, Taiwan, Vietnam, West Himalaya as per POWO;
China (Anhui, Hubei, Jiangsu, Jiangxi, Shandong), Japan, Korea, Bangladesh, Bhutan, India (Arunachal Pradesh, Assam, West Bengal, Sikkim, Darjeeling, Uttarakhand, Himachal Pradesh, Manipur, Bihar), Nepal, Myanmar [Burma], Vietnam, Indonesia, ?Australia (?Queensland), Pacific as per Catalogue of Life;


I.d. requested : 9 posts by 2 authors. Attachments (1)- 3 MB.
Would like to request the I.d.

Picture taken on 26/11/17
Place Raniganj (W.B.)
Details about the plant is that it grew out by itself during the month of June17. Earlier the leaf were like arrowhead vine which than turned into (as seen in the pic)
Now as the temperature hovers around a min 16deg. It shows signs of hibernation.
Kindly help with the id.

Very very doubtful IDrather a guess: Could this be a species of  Rhipsalis (Rhipsalis campos-portoana ???????) 

Ceratopteris thalictroides?

Possibly Ceratopteris thalictroides

This is Ceratopteris thalictroides subsp. gaudichaudii – which is a cytological aneuploid separate from subsp. thalictroides. It is a marsh and water-plant, but can grow on banks of rice-fields.  Ceratopteris species have two types of leaves, sterile leaves have much wider segments, and even when under water sometimes have circular to ovate, undivided and unlobed leaves. But plants can’t be identified from such leaves- it is the fertile leaves (shown) that are diagnostic.

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