AMARANTHACEAE-CHENOPODIACEAE week: Achyranthes bidentata

[D.S Rawat]

Achyranthes L. genus (Amaranthaceae) is represented by 11 species in the world (The Plantlist 2013) and 5 naturally occurring (not cultivated) species in India. These are A. aspera, A.bidentata, A.coynei, A.porphyristachya and A.shahii. Of these A.aspera is most common and widespread in India.

Here I am enclosing pics of Achyranthese bidentata Blume.

 A.bidentata and A.aspera can be differentiated by following key:

Leaves thick, scabrid, staminodes fimbriate from margins, wings of bracteoles less than 1mm....A.aspera

Leaves thin, membranous, staminodes toothed, wings of bracteoles 1.5-2mm long....................A.bidentata

In addition to this A.bidentata usually have smaller spikes.

DSRawat Pantnagar

[Dinesh Valke]

Many thanks Rawat ji, for the India-centric information regarding this genus; thanks for the keys too.

Regards.

Dinesh

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[Gurcharan Singh]

Thanks Rawat ji for this important upload, A. bidentata with pink flowers. In many parts in Western Himalayas the flowers are greenish. We found many populations of A. dentata with pink flowers in Chakrata region.

    Important to point out that there have been some uploads of pink flowered Achyranthes from Western Himalayas which some members suggested as A. coynei, a species endemic to Western Ghats.

     It must be noted that A. coynei is much different from A. dentata and more a gigantic form of A. aspera with larger habit and very long inflorescence often more than 30 cm long and thicker leaves, whereas this pink flowered form of A. bidentata.

    It would be good idea for some researcher to study critically the normal green-flowered form and pink-flowered form of A. bidentata.

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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/     

[Ushadi Micromini]

Thank you , appreciate it

Usha di

On Mon, Feb 4, 2013 at 2:08 PM, D.S Rawat <drdsrawat...@gmail.com> wrote:

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Usha di
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[Ushadi Micromini]

Gurchranji
is there is key for anatomic features and regional habits of the species?
usha di

Usha di
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[Satish Phadke]

Many thanks for the detail information from you and Sing ji
A.porphyristachya has been named as a var. of A aspera in Mah BSI flora. withe description of leaves similar to what you have described for the above species.i.e glabrous mambranous as against thick velvetty tomentose in A.aspera.
but......as you have described ; pattern of staminodes must be the key for distinguishing amongst the two. (Of course apart from the geographical distribution.)

Dr Satish Phadke

On Mon, Feb 4, 2013 at 2:08 PM, D.S Rawat <drdsrawat...@gmail.com> wrote:

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