Araceae, Arecaceae and Zingiberaceae Fortnight: Araceae- Colocasia esculenta (L.) Schott (??)from Assam KD AUG 08

[Karuna Das]

Dear All,

    Attached images may be Colocasia esculenta  (L.) Schott (??). The plant has been growing in my residence for many years. But flowering not seen.Please validate.  

Date :11.08.2014

Location: At my residence (Guwahati)

Family : Araceae

Genus & species : Colocasia esculenta  (L.) Schott (??).

Habitat: Grows on damp places of hilly area

Habit : Herb, Leaf margin purple, petiole bluish in colour   

Flower :Flowering not seen

 

With regards

Karuna Kanta Das

Guwahati 781012

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[Gurcharan Singh]

Nice photographs Karuna ji.

Dr. Gurcharan Singh

Retired  Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297  Mob: 9810359089

http://www.gurcharanfamily.com/ 
http://people.du.ac.in/~singhg45/

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[J.M. Garg]

Forwarding again for Id confirmation or otherwise please.

Some earlier relevant feedback:

efi page on Colocasia esculenta

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With regards,
J.M.Garg

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[Aarti S. Khale]

Garg Ji,

Looks like Colocasia esculenta 'Fontanesii' to me.

Regards,

Aarti

[surajit koley]

Sir,

Since leaves are not peltate, I think this should be Alocasia. Please see the entry in Haines.

Thank you

Regards

[Pudji Widodo]

To me, the presence of intramarginal vein indicates Xanthosoma. I am happy if the name is Xanthosoma violaceum (the violet one).  But this is regarded as the synonym of Xanthosoma sagittifiolium (the green one).  Correct me if I am wrong. Thank you.

Pudji Widodo

Faculty of Biology Jenderal Soedirman University

PURWOKERTO 53122 INDONESIA

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Pudji Widodo
Fakultas Biologi Universitas Jenderal Soedirman
PURWOKERTO 53122 INDONESIA

[J.M. Garg]

Forwarding again for Id confirmation or otherwise please.

Some earlier relevant feedback:

Looks like Colocasia esculenta 'Fontanesii' to me. Regards, Aarti

Since leaves are not peltate, I think this should be Alocasia. Please see the entry in Haines. Attachments (1).- from Surajit ji.

To me, the presence of intramarginal vein indicates Xanthosoma. I am happy if the name is Xanthosoma violaceum (the violet one).  But this is regarded as the synonym of Xanthosoma sagittifiolium (the green one).  Correct me if I am wrong. Thank you. Pudji Widodo

efi page on Xanthosoma sagittifolium

---------- Forwarded message ----------
From: Karuna Das <kd_...@rediffmail.com>
Date: 12 August 2014 19:33
Subject: [efloraofindia:196545] Araceae, Arecaceae and Zingiberaceae Fortnight: Araceae- Colocasia esculenta (L.) Schott (??)from Assam KD AUG 08
To: indiantreepix <indian...@googlegroups.com>

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[surajit koley]

Pudji Ji,

I couldn't understand "intramarginal vein". Would you please tell me if the attached picture qualifies for Xanthosoma?

Thank you

Regards

[surajit koley]

Pudji Ji, attached herewith closer view.

Thank you once again.

Regards

[Pudji Widodo]

Dear Surajit Ji,

Differences between Xanthosoma & Colocasia:

1. Xanthosoma leaves sagittate, Colocasia leaves ovate, cordate

2. X leaf surface not waxy.  C. waxy

3. X intramarginal vein clear. C. not clear

4. X. rhizome many. C. rhizome only one

Best Wishes,

[Pudji Widodo]

Dear Surajit Koley Ji,

An intramarginal veins is a vein parallel to the leaf margin.  So, I think your leaf is not included in Colocasia.  Another reason is that your leaf surface is shiny. 

[surajit koley]

Dear Pudji Ji,

I thank you very much. The difference between Xanthosoma and Colocasia would help a lot, indeed. Though, in comparison to your point no.1, FoC, FoP, FoNA inform Leaves of Colocasia is ovate to ovate-cordate to sagittate-cordate!

But, that's not a big deal! Last month I have written a number of times, in various thread, that leaves of Colocasia are peltate! I think this should be the first point to remove Colocasia in this scenario and I have already written that in this very thread!

So, my query was difference between Xanthosoma and Alocasia.

Thank you again.

Regards

[surajit koley]

Dear Pudji Ji,

As I wrote in my earlier mail, sent you minutes ago, the question is not if it can be Colocasia. The question is - why it can't be Alocasia?

Thank you

Regards

[Pudji Widodo]

The leaves of both Xanthosoma & Colocasia are also peltate if they are looked based on the the position of the petiole.  But from above it can be sagittate, ovate etc.

It is not Alocasia because the later has stem which can be so long.  Not only inside the ground.  The leaves contain a lot of oxallate crystal.  It is only used for feeding gouramy fish (Osphronemus gouramy).

Correct me if I am wrong.

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[surajit koley]

Good morning Pudji Ji and very Happy Teachers' Day

Alocasia is edible, though not all the species or all var., and not throughout anytime of the year. Usually the stocks and/or leaves with petioles are collected after the monsoon and are sold in the market. Some people do not eat it while it is favourite to other people. Since leaves are collected from time to time the wild Alocasia plant do not get much time to grow uninterrupted. My colleagues who eat Alocasia inform me that the stocks do grow 5-6 ft above the ground when they are cultivated in certain region and left in the field for more than a year. In all cases leaves of these plant are shiny/polished. Non-peltate leaves with polished/shiny upper-surface tell me that those are Alocasia, neither Colocasia nor Xanthosoma.

Karuna Ji's plant may be Xanthosoma as you have suggested, but I do not know, for I do not have any literature and Xanthosoma is new to me as I have written that in another thread - https://groups.google.com/forum/#!topic/indiantreepix/sHHRMo8ZpaM.

Let's move to the other thread https://groups.google.com/forum/#!topic/indiantreepix/sHHRMo8ZpaM to avoid any confusion.

Thank you very much

Regards

[Gurcharan Singh]

Forwarding for ID

Distributed as Xanthosoma sagittifolium ?

Group discussion at

Araceae, Arecaceae and Zingiberaceae Fortnight: Araceae- Colocasia esculenta (L.) Schott (??)from Assam KD AUG 08 (google.com)

[Gurcharan Singh]

Forwarding for ID

Distributed as Xanthosoma sagittifolium ?

Group discussion at

Araceae, Arecaceae and Zingiberaceae Fortnight: Araceae- Colocasia esculenta (L.) Schott (??)from Assam KD AUG 08 (google.com)

[J.M. Garg]

Hi, Surajit ji,

What do you say ?

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With regards,
J.M.Garg

[J.M. Garg]

I would like to go for Xanthosoma sagittifolium

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With regards,
J.M.Garg

[surajit koley]

Yes, Sir, I agree with Pudji ji's id determination.

Maybe one reason for not flowering is that the place is relatively dry ?

Here they grow (or perhaps were planted by our forebearers) around ponds or DOBA (unmaintained waterbody, smaller than pond). In this summer season they are the size of a Colocasia esculenta, but during and after the rainy season they are gigantic in comparison to Colocasia.

Xanthosoma sagittifolium is an enduring plant (Colocasia too), once someone places a rhizome in the ground (or even on a wet surface) it will grow years after years, even if you cut aerial parts regularly  Only leaves and petioles are eaten here.

Thank you.

Best regards,

Surajit Koley

On Thu, 29 Apr 2021 at 16:10, J.M. Garg <jmg...@gmail.com> wrote:

[surajit koley]

Certainly, Sir ji.

Thank you.

Best regards,

Surajit Koley

[J.M. Garg]

Thanks a lot, Surajit ji

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With regards,
J. M. Garg