GRAM Looking to ID this Acacia

[Ganeshram Esh]

GRAM 20160717

Found this Tree at Kasara, Maharashtra in July 2016.

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In Rhythm

Ganeshram

Data Miner - Naturalist

[J.M. Garg]

Thanks, Esh ji, for such detailed pictures.

Pl. check comparative images of different species in efi at Acacia

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With regards,
J.M.Garg

'Creating awareness of Indian Flora & Fauna'

Winner of Wipro-NFS Sparrow Awards 2014 for efloraofindia. 

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[N Arun Kumar]

Excellent photography .

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Regards,

Arun Kumar N

[Tapas Chakrabarty]

The habit is tree; prickles scattered on branchlets, inflorescences terminal panicles of heads and midvein of leaflets starting centrally at base - when these characters are combined, they lead on to Senegalia caesia (previously Acacia caesia).

Thanks.

[Ganeshram Esh]

Thank you Garg ji and Arun Kumar ji. 

Tapas ji thank you for pointing out characters before telling us the species.  

I am trying to understand if there is variability of characters within this species. Going by JCB Herbarium, the key mentions the presence of glands on the rachis, at the base of all pairs of pinnae. I checked a few of the leaves to confirm where the glands were present and they were all consistent with one at the base and either 2 - 3 at the top most pinnae. 

Also, the presence and absence of spines is the pedicel - is that also a variable character? 

[Tapas Chakrabarty]

Your observations were correct.

I worked on Indian Acacias long back and published an account of the same in 1996.  As regards Acacia caesia, it is indeed a variable species and I merged A. torta with it, having found ample intergradations. I had examined relevant specimens in all the major Indian herbaria. It is interesting to note that while majority of the collectors mentioned it to be scandent shrubs or climbers, many others found it to be trees, 3 - 10 m high.  

In recent past the indigenous Indian species of Acacia were transferred mainly to Senegalia and Vachellia.  I noticed some discrepancies in these publications but I have not published any rejoinder on them except for one short note on Vachellia eburnea as this is not my priority area at present. I am not at all fully satisfied with these publications.

I came to know that a Ph. D. student at Goa University is now working on Indian Acacias and he has found some ways for differentiating A. caesia from A. torta. There is, however, no publication seen by me from that end.

I can raise several questions which are to be answered by the future workers on Indian Acacias.

Regards,

Tapas. 

[Ganeshram Esh]

Thank you very much Tapas ji. That was very informative :) 

[J.M. Garg]

Senegalia torta as per Anup at GRAM Looking to ID this Acacia 

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With regards,
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[Ganeshram]

Thank you very much.

[J.M. Garg]

Senegalia torta as per Anup ji at Fabaceae: Acacia sp.

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With regards,
J.M.Garg