Ceratopteris thalictroides subsp. gaudichaudii

Ceratopteris thalictroides subsp. gaudichaudii (Brongn.) Fraser-Jenkins & Pariyar (syn: Ceratopteris gaudichaudii Brongn.; Ceratopteris gaudichaudii var. vulgaris Masuyama & Watano);
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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;

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

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

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Possibly Ceratopteris thalictroides

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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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References:
POWO  Catalogue of Life  The Plant List Ver.1.1  GBIF  Flickr