Achyranthes bidentata Blume (syn: Achyranthes bidentata var. longifolia Makino) as per Catalogue of Life;
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ak-ky-RAN-thees — from the Greek words: achyr (chaff) and anthos (flower)Dave’s Botanary
by-den-TAY-ta or by-den-TAH-ta — two-toothDave’s Botanary
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commonly known as: hill chaff flower, ox knee, pig’s knee • Malayalam: പെരുംകടലാടി perumkadalaadi • Nepali: दतिवन् datiwan, रातो अपमार्ग ratoapamarga • Tamil: நாயுருவி nayuruvi

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Native to: w & w-c tropical Africa, Indian subcontinent, Indo-China, Malesia
Branched herb, often reaching 1.5 m subglabrous or sparsely hairy; leaves elliptic-ovate to elliptic-lanceolate, acuminate, green, sparsely hairy to subglabrous; petiole 3-20 mm long; inflorescence scarcely 10 cm long in
flower, elongating to up to 20 cm in fruit; bracteoles spiny 2-parted at base; pseudostaminode serrate or erose at apex. (The species is quite distinct from A. aspera in which plants are generally less branched, densely hairs, leaves rounded or mucronate at apex, fruiting inflorescence often as long as 40 cm, bracteoles spiny and 2-winged at base, pseudostaminode fimbriate and ciliate at apex.)
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A.bidentata and A.aspera can be differentiated by following key:
Leaves thin, membranous, staminodes toothed, wings of bracteoles 1.5-2mm long……………….. A.bidentata
Leaves thick, scabrid, staminodes fimbriate from margins, wings of bracteoles less than 1mm…. A.aspera
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
A.porphyristachya has been named as a var. of A aspera in Mah BSI flora. with 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.
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Achyranthes for id 241210MK2: please help to id this Amaranthaceae member. Is this any variety of Achyranthes species?

Date/Time- 06-11-2010 / 1:30 PM
Location- Place, Altitude, GPca.2200asl; Kodaikanal, TN
Habitat- Garden/ Urban/ Wild/ Type- roadside; perhaps weed
Plant Habit-straggling herb
Height/Length- ca. 1 M
Leaves Type/ Shape/ Size- ca. 10 x 3 cm; reddish margin;
Inflorescence Type/ Size- ca. 10cm long spike
Flowers Size/ Colour/ Calyx/ Bracts- pinkish


– Thank you all for the confirmed id. Sennaiyuruvi is the Tamil name. I hope this plant grows in evergreen or moist deciduous forests.



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Achyranthes bidentata from Manali: Achyranthes bidentata Blume, Bijdr. 545 1826.
syn: Achyanthes chinensis Osbeck; A. hispida Moq.; A. japonica (Miq.) Nakai; Centrostachys bidentata (Blume) Standl.
A plant of subtropical and temperate climates usually ascending to 2500 m. Differs from tropical weed A. aspera in being sparsely hairy, in thin larger leaves, ovate-lanceolate, 7-15 cm long, apex narrowed and acuminate; spikes slender, much shorter, rarely exceeding 12 cm; staminodes minutely toothed at tip without a fimbriate dorsal scale.
Photographed from Manali in October, 2009.

Yes A. bidentata, it also very common in Western Ghat



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Achyranthes bidentata: Achyranthes bidentata Blume, Bijdr. 545. 1826
Branched herb, often reaching 1.5 m subglabrous or sparsely hairy; leaves elliptic-ovate to elliptic-lanceolate, acuminate, green, sparsely hairy to subglabrous; petiole 3-20 mm long; inflorescence scarcely 10 cm long in
flower, elongating to up to 20 cm in fruit; bracteoles spiny 2-parted at base; pseudostaminode serrate or erose at apex. (The species is quite distinct from A. aspera in which plants are generally less branched, densely hairs, leaves rounded or mucronate at apex, fruiting inflorescence often as long as 40 cm, bracteoles spiny and 2-winged at base, pseudostaminode fimbriate and ciliate at apex.)

Photographed from Dachhigam forest in Kashmir on July 30, growing in shade of shrubs and trees.



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Flora of Chakrata: Achyranthes bidentata from Chakrata Area:  Achyranthes bidentata from Chakrata Area
pls validate



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Plant for ID from Paddar valley J&K. 271211 SRANA 01:

Kindly identify the plant.
Date: 28th July 2011.
Location: Paddar valley district Kishtwar J&K.
Altitude: 2500 meters asl.
Plant height: 50-70 cms

Plant habit/habitat: Wild



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1 AUG 12
Govind Ghat – Ghangaria trail about 7800 ft
Habitat: mountain slope
Habit: herb, about 1 – 1.5 m high

Yes … Another common Himalayan plant.


 

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VOF Week: Achyranthes sp?? along Govindghat — Ghangaria route: Achyranthes sp?? (Family:Amaranthaceae ) along Govindghat — Ghangaria route.


A bidentata I think


Yes Achyranthes bidentata


 

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Chenopodiaceae and Amaranthaceae Week :: DV02 :: 01 AUG 12 11:21:39 :: Achyranthes bidentata along Govind Ghat – Ghangaria trail:   Achyranthes bidentata Blume
ak-ky-RAN-thees — from the Greek words: achyr (chaff) and anthos (flower)Dave’s Botanary
by-den-TAY-ta or by-den-TAH-ta — two-toothDave’s Botanary
commonly known as: ox knee • Nepali: दतिवन् datiwan, रातो अपमार्ग ratoapamarga • Tamil: நாயுருவி nayuruvi
Native to: w & w-c tropical Africa, Indian subcontinent, Indo-China, Malesia
References: Flowers of IndiaFlora of ChinaNPGS / GRINENVIS – FRLHT

along Govind Ghat – Ghangaria trail on 01 AUG 12



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Chenopodiaceae and Amaranthaceae Week: Achyranthes bidentata from Paddar Valley J&K:

Kindly confirm the ID
Bot. name: Achyranthes bidentata
Family: Amaranthaceae
Location: Paddar Valley J&K

Altitude: 1800 m asl


Yes … Nice Photograph


 

Achyranthes bidentata Blume, Bijdr. Fl. Ned. Ind. 545. 1826.

Perennial herb up to 1 m tall, green or tinged purple, some what 4-angled, appressed pubescent or nearly glabrous, branches opposite; leaves opposite, elliptic to elliptic-lanceolate, up to 12 cm long, thinly hairy especially below, apex caudate; flowers green or pinkish, up to 5 mm long on terminal usually up to 10 cm long spike; bracts broadly ovate, 2-3 mm long, bracteoles 3 mm long, spiny, base 2-parted, apex curved; perianth 4-5 mm long, apex acute erose, without fimbriate dorsal scale; utricle 2-2.5 mm long.

Photographed from Kashmir and Manali



 

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AMARANTHACEAE-CHENOPODIACEAE week: Achyranthes bidentata: 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.

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


Thanks … 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.


Many thanks for the detail information from you and … A.porphyristachya has been named as a var. of A aspera in Mah BSI flora. with 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.)



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Chenopodiaceae and Amaranthaceae Week: Achyranthes bidentata with pink flowers?: This interesting Achyranthes was photographed growing commonly along roadsides from Dakpathar to all the way up to Chakrata, having the habit, leaves and inflorescence of A. bidentata but with pink flowers. This plant needs further critical study in light of the fact that a pink flowered form of related species A. aspera has been described as distinct species A. coynei endemic Ghats. Here are points of distinction of concerned taxa:

A. coynei: Perennial shrubby in habit, 2-4 m tall, pubescent when young, glabrescent when old; leaves broadly elliptic, 15-23 cm long, 7-10 cm broad, subglabrous above, pubescent beneath, especially along veins; petiole 1-3 cm long; flowers rosy purple, up to 1.5 cm across when open, dense on 30-60 cm long spike; bract 5 mm long, bracteoles with papery wing, tepals up to 8 mm long, pseudostaminodes fimbriate; utricle 5 mm long.
A. aspera: Perennial herb up to 1 m tall, 4-angled, slightly inflated at nodes, pubescenct., branches opposite; leaves opposite, broadly obovate to elliptic-oblong, hairy on both surfaces, apex obtuse, slightly mucronate; petiole up to 1.5 cm long; flowers green to tinged red, in terminal spikes, initially condensed finally up to 40 cm long; rachis densely hairy, angular; bracts 3-4 mm long, lanceolate, bracteoles spiny, 3-5 mm long, rigid with two basal membranous wings; perianth 4-5 mm long; pseudostaminodes crenate at apex; dorsal scale fimbriate or ciliate ; utricle ovoid, 3 mm long.
A. aspera var. porphyristachya: Perennial herb 1.4-2 m tall, densely branched; leaves opposite, broadly elliptic, 7-25 cm long, acuminate; spike slender

A. bidentata: Perennial herb up to 1 m tall, green or tinged purple, some what 4-angled, appressed pubescent or nearly glabrous, branches opposite; leaves opposite, elliptic to elliptic-lanceolate, up to 12 cm long, thinly hairy especially below, apex caudate; flowers green or pinkish, up to 5 mm long on terminal usually up to 10 cm long spike; bracts broadly ovate, 2-3 mm long, bracteoles 3 mm long, spiny, base 2-parted, apex curved; perianth 4-5 mm long, apex acute erose, without fimbriate dorsal scale; utricle 2-2.5 mm long.


Thanks Sir for this upload..surely this genus is interesting…I will post mine pics from different places..I am not sure about their identification, definitely it is not as simple as we consider this to be..leaves are distinct in A. aspera..in all other forms leaves are almost similar..more closer look is perhaps mandatory for reaching to conclusion..


Short spike indicating A.bidentata.(Like)



Chenopodiaceae and Amaranthaceae Week :: PKA14 :: Achyranthes bidentata along Govindghat — Ghangaria route:  Achyranthes bidentata (Family: Amaranthaceae ) along Govindghat — Ghangaria route.


Yes … Very nice photograph.



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Plant for ID ABAUG01/22 : 3 posts by 3 authors. 3 images.

This one is quite common too and I had photographed it several times before intending to share and ask for advice but didn’t get the time to do so. Please advise.
Above Mcleodganj, Dharamshala, HP
1800m

17 August 2015


This is again Achyranthes bidentata


very nice and for comparison too



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Plant for ID ABAUG01/23 :  4 posts by 3 authors. 3 images.

This could be a species similar to the one in my previous post.
The leaves are markedly narrower and flowers pink. Please advise.
Above Mcleodganj, Dharamshala, HP
1800m

17 August 2015


Am not familiar with the flora of Mcleodganj, but this could be a species of Achyranthes.


This is Achyranthes bidentata


Thank you once again. I knew its common name had Ox somewhere but kept on searching for Ox tongue and not Ox knee as it’s called.

There is a big difference in the leaf shapes of this and the other plants I submitted in a different mail. Are both the exact same sp?



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Alternanthera images for validation : 5 posts by 3 authors. Attachments (3)

attaching images 01,02,03 of Alternanthera coynae for validation please


efi page on Achyranthes coynei


Interesting …, how do you identify it from other Achyranthes?
I was going through the paper http://threatenedtaxa.org/ZooPrintJournal/2011/June/o268526vi111875-1879.pdf and found superficial features described in that paper tallies (at least several features) with my species in following threads!
Yet none of my above two threads is A. coynei.

The set featured in this thread neither shows l-o-n-g spike nor densely arranged flowers, nor even similar leaves found in the paper above.


Achyranthes species in eFloraofindia (with details/ keys from published papers/ regional floras/ FRLHT/ FOI/ Biotik/ efloras/ books etc., where ever available on net) 


Please mention the place and altitude
Achyranthes bidentata grows mostly at altitudes above 3000 ft, may sometimes have pinkish flowers giving false impression of A. coynei, but habit as well as spike length (mostly less than 10 cm long) are like A. bidentata. Also leaves are usually acuminate as we can see here..
A. coynei is rather a gigantic form of Achyranthes aspera (which has hairy stems and leaves) with pinkish flowers and much longer spike (35-60 cm long as against 10-30 cm in A. aspera). Leaves are mostly obtuse with small mucro.

It looks more like A. bidentata.



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Achyranthes bidentata : 1 post by 1 author. Attachments (4)

Sharing some pictures of Achyranthes bidentata shot at Kakani on 28 July 2016 at 6000 ft.


Some more pics! Attachments (2)


ID validation please !


Pl. check with comparative images at Achyranthes & keys at Achyranthes bidentata Blume



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Baba Budangiri Karnataka
Date: 14 NOV 2016 … Altitude: ~ 1733 – 1895 m ( 5686 – 6217 ft) asl
Achyranthes ¿ bidentata ? … (family: Amaranthaceae)
Dear friends,
Erect herb, standing about a metre high; not sure photos show relevant aspects; please validate

I think yes. Very clear images


Thank you very much … for validating the possibility, and for appreciation.



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Saw these en route Ghangaria from Govindghat, Uttarakhand in Aug 2018.
Again identified based on the pics available in efi.
Kindly validate.

For me ID is correct. It is seen here as well.


FOI lists A. bidentata. vernacular names include apamarg

but the  apamarg of ayurvedic medicinal herbs is Achyranthes aspera 

we need a detailed key
can someone from BSI or researchers who work on amaranthaceae of india help?

Yes …


I will also go with Achyranthes bidentata Blume as per comparative images at Achyranthes


 


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SK194NOV11-2016:ID : 5 posts by 2 authors. Attachments (10)

Location: Suryavinayak Forest , Bhaktapur , Nepal
Altitude:  4500 ft.
Date: 11 September 2016

Achyranthes sp?? Why purple color on the back of leaf?


Appears so. pl. Check comparative images in EFI site.


Tried but did dot find any with purple leaf underneath.


Pl. check all the threads under this.


Please help with Nepali name for Achyranthes aspera, if any.


दतिवन Datiwan/ अपामार्ग  Apaamaarg/  उल्टो कुरो UltO Kuro/ अकमारो Akamaro/  जम्दी Jamdee/ काली झार Kaalee Jhaar/ कुरो Kuro

This will also be Achyranthes bidentata as per discussions at Achyranthes bidentata Blume ???


 


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Achyranthes bidentata Blume ??? : 5 posts by 2 authors. Attachments (8)
Location:  Suryavinayak, Bhktapur, Nepal
Date: 7 October 2017

Elevation : 4800 ft.


Accepted name Achyranthes coynei Santapau ??


Awesome photos. For me the ID looks correct.


You mean Achyranthes coynei Santapau Syn: Achyranthes aspera var. porphyristachya (Wall. ex Moq.) Hook.f.  ?


For Achyranthes bidentata 


http://florakarnataka.ces.iisc.ac.in/hjcb2/herbsheet.php?id=228&cat=1 

Images here have uncanny similarity to your specimen. Achyranthes bidentata for me (I have recorded it from Matheran WG) .

And it is definitely not A. aspera or any of its varieties. Neither A. coynei for its lack of very long spikes.


Thanks, Rakesh ji, for the id.
As per keys at Flora of China:
2 (1) Leaves obovate, broadly obovate, or elliptic-oblong, apex obtuse with a mucro; bracteoles spiny, 2-winged at base; pseudostaminode long fimbriate and ciliate at apex. 1 A. aspera
+ Leaves elliptic or elliptic-lanceolate, apex caudate; bracteoles spiny, 2-parted at base; pseudostaminode serrulate at apex. 2 A. bidentata
As leaves are elliptic or elliptic-lanceolate and apex caudate, it should be Achyranthes bidentata

Hi, …, Can you post original of 3rd and 4th image. I want to understand bracteoles 2-parted at base ?



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Names of Plants in India :: Achyranthes bidentata Blume:  via Species‎ > ‎A‎ > ‎  Achyranthes bidentata Blume … family: Amaranthaceae

Flowers of India Discussions at efloraofindia more views in flickr more views on Google Earth
ak-ky-RAN-thees — from the Greek words: achyr (chaff) and anthos (flower)Dave’s Botanary
by-den-TAY-ta or by-den-TAH-ta — two-tooth … Dave’s Botanary
commonly known as: ox kneeNepali: दतिवन् datiwan, रातो अपमार्ग ratoapamargaTamil: நாயுருவி nayuruvi
botanical names: Achyranthes bidentata Blume … synonyms: no synonym known
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
Photographed along Govind Ghat – Ghangaria trail on 01 and 04 AUG 12
… more views of this plant during these days:

ak-ky-RAN-thees — from the Greek words: achyr (chaff) and anthos (flower) … Dave’s Botanary
by-den-TAY-ta or by-den-TAH-ta — two-tooth … Dave’s Botanary

commonly known as: hill chaff flower, ox knee, pig’s knee • Malayalam: പെരുംകടലാടി perumkadalaadi • Nepali: दतिवन् datiwan, रातो अपमार्ग ratoapamarga • Tamil: நாயுருவி nayuruvi

botanical namesAchyranthes bidentata Blume … synonymsAchyranthes chinensis Osbeck • Achyranthes fruticosa Lam. • Achyranthes hispida Moq. • Achyranthes javanica Moq. • Achyranthes mauritiana Moq. • Centrostachys bidentata (Blume) Standl. … status at GBIF

Bibliography / etymology
~~~~~ ENGLISH ~~~~~
hill chaff flower
ox knee
pig’s knee
~~~~~ MALAYALAM ~~~~~
പെരുംകടലാടി perumkadalaadi
  • also പെരുങ്കടലാടി perukkadalaadi … many thanks to VC Balakrishnan and Vinaya Raj V R for help with this name … facebook
~~~~~ NEPALI ~~~~~
दतिवन् datiwan
रातो अपमार्ग ratoapamarga
நாயுருவி nayuruvi
~~~~~ x ~~~~~

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