ID of grass sp.-1 from Assam KD 05 Nov.

[Karuna Das]

Dear All,

    Attached images are grass sp. Please ID the plant.  

Date :31.10.2014

Location: Assam

Family : Poaceae

Genus & species : ??

Habitat: Grows wild on sides of railway tract

Habit : Herb

 

With regards

Karuna Kanta Das

Guwahati 781012

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[surajitkoley]

Please check probability of Setaria poiretiana (Schult.) Kunth.

Thank you

Regards

[kd_...@rediffmail.com]

Dear Surajit

I think my specimen donot match with Setaria poiretiana (Schult.) Kunth.(http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000281854) but hope match with Setaria palmifolia ( 

http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000885916  & http://www.efloras.org/object_page.aspx?object_id=95567&flora_id=2 eBa� e K Xp3 �! ">http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000885916. So please validate.

With regard

Karuna Kanta Das

[surajit koley]

Quite possible Sir, but I do not know how to differentiate palmifolia, plicata, barbata and poiretiana.

Thank you

Regards

 

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[J.M. Garg]

Forwarding again for Id confirmation or otherwise please.

Some earlier relevant feedback:

Please check probability of Setaria poiretiana (Schult.) Kunth. Thank you Regards

Surajit

I think my specimen donot match with Setaria poiretiana (Schult.) Kunth.(http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000281854) but hope match with Setaria palmifolia (  http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000885916  & http://www.efloras.org/object_page.aspx?object_id=95567&flora_id=2 eBa� e K Xp3 �! ">http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000885916. So please validate. With regard Karuna Kanta Das

Quite possible Sir, but I do not know how to differentiate palmifolia, plicata, barbata and poiretiana. Thank you Regards  Suarjit

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With regards,
J.M.Garg

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[J.M. Garg]

Forwarding again for Id confirmation or otherwise please.

Some earlier relevant feedback:

Please check probability of Setaria poiretiana (Schult.) Kunth. Thank you Regards                                       Surajit

I think my specimen donot match with Setaria poiretiana (Schult.) Kunth.(http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000281854) but hope match with Setaria palmifolia (  http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000885916  & http://www.efloras.org/object_page.aspx?object_id=95567&flora_id=2 eBa� e K Xp3 �! ">http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000885916. So please validate. With regard Karuna Kanta Das

Quite possible Sir, but I do not know how to differentiate palmifolia, plicata, barbata and poiretiana. Thank you Regards  Suarjit

---------- Forwarded message ----------
From: Karuna Das <kd_...@rediffmail.com>
Date: 3 November 2014 21:20
Subject: [efloraofindia:205084] ID of grass sp.-1 from Assam KD 05 Nov.
To: indiantreepix <indian...@googlegroups.com>

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[surajit koley]

I may be quite wrong but S. palmifolia looks different in general appearance in -

1. http://keyserver.lucidcentral.org/weeds/data/03030800-0b07-490a-8d04-0605030c0f01/media/Html/Setaria_palmifolia.htm
   
2. http://www.nzpcn.org.nz/flora_details.aspx?ID=2710
   
3. http://taibif.org.tw/taibif_search/species_detail.php?name_code=201681
   
4. http://plants.usda.gov/core/profile?symbol=SEPA6
   
5. http://www.plantphoto.cn/tu/1262636
   

To me it looks rather the one in https://groups.google.com/forum/#!msg/indiantreepix/KeN34x1NGeY/wkrFX9KQEkAJ or in http://www.natureloveyou.sg/Setaria%20barbata/Main.html

Thank you

Regards

[J.M. Garg]

Forwarding again for Id confirmation or otherwise please.

Some earlier relevant feedback:

Please check probability of Setaria poiretiana (Schult.) Kunth. Thank you Regards                                       Surajit

I think my specimen donot match with Setaria poiretiana (Schult.) Kunth.(http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000281854) but hope match with Setaria palmifolia (  http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000885916  & http://www.efloras.org/object_page.aspx?object_id=95567&flora_id=2 eBa� e K Xp3 �! ">http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000885916. So please validate. With regard Karuna Kanta Das

Quite possible Sir, but I do not know how to differentiate palmifolia, plicata, barbata and poiretiana. Thank you Regards

Surarjit

I may be quite wrong but S. palmifolia looks different in general appearance in - http://keyserver.lucidcentral.org/weeds/data/03030800-0b07-490a-8d04-0605030c0f01/media/Html/Setaria_palmifolia.htm http://www.nzpcn.org.nz/flora_details.aspx?ID=2710 http://taibif.org.tw/taibif_search/species_detail.php?name_code=201681 http://plants.usda.gov/core/profile?symbol=SEPA6 http://www.plantphoto.cn/tu/1262636 To me it looks rather the one in https://groups.google.com/forum/#!msg/indiantreepix/KeN34x1NGeY/wkrFX9KQEkAJ or in http://www.natureloveyou.sg/Setaria%20barbata/Main.html Thank you Regards

---------- Forwarded message ---------
From: Karuna Das <kd_...@rediffmail.com>
Date: Mon, 3 Nov 2014 at 21:20
Subject: [efloraofindia:205084] ID of grass sp.-1 from Assam KD 05 Nov.
To: indiantreepix <indian...@googlegroups.com>

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With regards,
J.M.Garg

[J.M. Garg]

Thanks a lot, Manoj ji

---------- Forwarded message ---------
From: Manoj Chandran <mach...@gmail.com>
Date: Sun, 7 Apr 2024 at 18:50
Subject: Re: [efloraofindia:205084] ID of grass sp.-1 from Assam KD 05 Nov.
To: J.M. Garg <jmg...@gmail.com>

Dear Sirs,

There are various species of Setaria in India having such plicate leaves.

Some of the distinguishingly visible characters are as follows:

1. Setaria barbata - The actual Setaria barbata does not have plicate leaves, though sometimes the basal portion may be plicate. Most Setaria barbata in herbaria are misidentified and actual Setaria barbata is a rare plant.

2. Setaria poiretiana - This is an ornamental plant that has escaped into the wild whereby the original dense panicled nature as shown in the Holotype at Kew has got lost and is represented by several short and spaced horizontal racemes with densely packed spikelets with subtending bristles visible among a few spikelets and hairy sheath and rachis. It is now invasive and found all over roadsides and gardens in coastal areas with high rainfall areas like Kerala, Assam, WB, etc. Hence, the photographs in this thread are those of this species. It matches with K000281854 and K000281855 with respect to the spaced racemes and densely packed spikelets but probably broken down in its hybrid vigour as it escaped into the wild.

3. Setaria homonyma - This is a rather common plant in North India with short and spaced horizontal racemes but with loosely scattered spikelets each with a subtending bristle.

4. Setaria palmifolia - This is usually found only in forest areas with dense shade and is a taller plant with a long raceme, with scattered ascending racemes of spikelets with short and occasional bristles.

5. Setaria paniculifera - This is also found in densely shaded forest areas and are giant grasses having giant panicles with occasional but long subtending bristles.

6. Setaria megaphylla - This is a garden plant having very large plicate leaves 

7. Setaria plicata - This is a very dwarf perennial plant with small plicate leaves and short panicles. It is rather rare and found from only a few collections in India, Srilanka and Myanmar.

Other Setaria species with plain leaves (not plicate) in India:

8. Setaria verticillata - dense cylindrical panicle with sticky bristles (due to retrorse barbs)

9. Setaria intermedia/tomentosa - dwarf plant with narrow panicle

10. Setaria italica - dense heavy drooping panicle due to weight of seeds - found in cultivation 

11. Setaria pumila/pallide-fusca - small cylindrical short spike like panicle with small spikelets (mostly in peninsular india)

12. Setaria glauca - small to medium length spike like panicle with larger spikelets and glaucous nature of stem. (mostly in northern India)

13. Setaria viridis - similar to glauca, but with larger green panicles and bristles (in higher altitudes and trans-himalayas)

14. Setaria sphacelata - tall grass with very long spike like cylindrical inflorescence - usually grown as fodder grass

15. Setaria forbesiana - similar to viridis but more open and drooping panicle

16. Setaria geniculata - similar to pumila, but with several geniculate branches from the base

If seen under a microscope, one can observe the differences in comparative sizes of the floral parts and the rugose nature of the upper lemmas, stamens, ligule, hairyness, leaf surface, venation pattern, indumentum of basal portion of stem, etc.

However, it should be noted that a "species" is just an artificial system of classification and the actual ability to naturally interbreed to produce fertile offsprings has not been tested, though various observations of intermediate forms may be visible. Rarity of a species is actually the measure of our ignorance about the species. The various 'species' presently reported may also be a result of hybridisation, polyploidy and other genetic reasons and may not be true 'species'. One need to go deep to find that out by repeated field and lab experiments. Even genetic experiments (genome sequencing) only tells the amount of difference in genetic character, but may not always clearly amount to describing or distinguishing species. Characters also depend on the expression of gene due to environmental factors including effects of other gene and their expressions, silencing of genes, etc. So, a mixture of morphological characters, anatomical characters, genetics and biogeography needs to be considered for assigning species status to a taxa. Until then, one needs to respect the variations observed by various taxonomists and put all those information in one place to capture all variations across all populations. 

Regards...

Manoj Chandran

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With regards,
J.M.Garg