Adiantum caudatum

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Adiantum caudatum L., Mant. Pl. 308 308 1771. (syn: Adiantum assamicum B.K.Nayar ; Adiantum borneense Gand. ; Adiantum caudatum var. angustilobatum Bonap. ; Adiantum flagelliferum Wall. ; Adiantum lomesam B.K.Nayar & Geev. ; Adiantum lyratum Blanco);
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Tropical & Subtropical Asia to SW. Pacific: Assam, Bangladesh, Borneo, Cambodia, China South-Central, China Southeast, East Himalaya, Hainan, India, Laos, Lesser Sunda Is., Malaya, Myanmar, Nepal, New Caledonia, New Guinea, Philippines, Sri Lanka, Sulawesi, Taiwan, Thailand, Vanuatu, Vietnam as per POWO;
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Walking Fern, tailed maidenhair;
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Keys as per efi thread:
1. A.lunulatum (syn. of Adiantum philippense L.)- entirely glabrous, pinnae pale green rarely dark green, pinnules are fan shape or lunar shape or in crescent form and fold down with sori (linear), stipe glabrous long and dark black 
2. A.caudatum – hairy, pinnae green ,hairs pale brown and giving a pale brownish color to whole, pinnules not crescent but almost straight  fold down with sori but length is very short compared to A.lunulatum, stipe is hairy brownish due to hair color short as compared to lamina.
   If the stipe is glabrous, A.zollingeri but no tail as in A.caudatum
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Adiantum caudatum L. from Kamrup district (Metro), Assam : Attachments (10). 3 posts by 3 authors.
Attached images are Adiantum caudatum L. (Walking fern). 
Date :14.10.2013
Location: Kamrup district (Metro), Assam
Family : Adiantaceae
Genus & species : Adiantum caudatum L.
Habitat: Grows wild hilly slopes
Habit : herb

Thanks … for detailed pics of vegetative as well as reproductive phases of this fern…

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ID-DKB185 – indiantreepix | Google Groups:
Plant from Virat nagar Forest Jaipur
For  ID-DKB185, It is a fern.
Photo Taken on-25.8.2009

… I got to know from one of my Flickr contacts that this plant is known as maiden hair fern.
Not yet knowing the botanical identity.

The Botanical name is Adiantum lunulatum.

Most probably Adiantum caudatum

Asiantum lunulatum’ is called ‘Rajhans’ ‘राजहंस’ / ‘Hanspadi’ ‘हंसपदी’ in Marathi.
and

‘Asiantum caudatum’ is called ‘Mayurshikha’ ‘मयूर‍‍शिखा’ in Marathi.

This looks like Maidenhair Fern, Genus Adiantum, Family: Pteridaceae (Adiantaceae) , sometimes found between bricks or stones on whole walls. Maybe Adiantum cunninghamii, which shows characteristic inrolled leaf margin containing sori. I have seen this type of fern almost covering an old brick wall, dried up in summer but again producing new green leaves after the advent of the rainy season. The leaf stems are dark, almost black, shiny and brittle.

The ferns of this genus (Adiantum) are called as maiden hair ferns.
The tree Gingo biloba has leaves with shape similar to this fern hence it is called as maiden hair tree but it has nothing to do with this fern.

It is Adiantum caudatum

I am sure on this, A.linulatum and A.cunninghamii are entirely different, It is Adiantum caudatum.

 

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References:
POWO  The Plant List  Discover Life – Pteridaceae: Adiantum caudatum Linnaeus – Tailed maidenhair