Bistorta macrophylla (D.Don) Soják, Preslia 46: 152 1974. (Syn: (=) Bistorta sphaerostachya (Meisn.) Greene; (≡) Polygonum macrophyllum D. Don (basionym); (=) Polygonum sphaerostachyum Meisn.);

As per flora of China, one of the major differences between B. vivipara and B. macrophylla is the presence of bulbills in the lower parts of the inflorescence in P. vivipara.


Herbs perennial. Rhizomes curved, large, 1-2 cm in diameter. Stems 2 or 3 from rhizome, erect, 8-30 cm tall, simple. Basal leaves petiolate; petiole 3-8 cm; leaf blade gray-green abaxially, green adaxially, oblong or lanceolate, 3-11 cm long, 1-3 cm wide, abaxially sometimes sparsely pubescent, adaxially glabrous, base subcordate or cuneate, margin with thickened vein tips, revolute, apex acute. Cauline leaves shortly petiolate or subsessile; leaf blade narrowly lanceolate or linear; ocrea: lower part green, upper part brown, tubular, membranous, apex oblique, dehiscent, not ciliate. Inflorescence terminal, shortly spicate, 1.5-2.5 cm, 1-1.5 cm in diameter; bracts ovate, 3-4 mm, membranous, apex acuminate, each 2-3-flowered. Pedicel 4-5 mm, slender. Perianth pinkish or white, 5-parted; tepals elliptic, 2.5-3 mm. Stamens 8, exserted; anthers black-purple. Styles 3, connate at base; stigmas capitate. Achenes included in persistent perianth, yellow-brown, shiny, ovoid, trigonous, 2.5-3 mm.

Polygonum macrophyllum var. macrophyllum is close relative of Polygonum macrophyllum var. stenophyllum, but differs from the latter in its basal leaves oblong or lanceolate, 10-30 mm wide (vs. linear-lanceolate, 2-5 mm wide).
Flowering from July to August; fruiting from August to September.
Polygonum macrophyllum is occurring in Guizhou, Hubei, Shaanxi, Sichuan, Xizang, Yunnan of China, Bhutan, N India, Nepal, Sikkim.
Growing in grassy slopes, alpine meadows; 2300-5000 m.
Rights holder(s): Wen, Jun

 

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Polygonum macrophyllum D.Don from Uttarakhand: Aug2014_DSR_11 : 6 posts by 4 authors. Attachments (1).
This rainy season Polygonum macrophyllum D.Don is common in alpine meadows of Uttarakhand.
Shot in Khalya alpine meadow, Pithoragarh (Uttarakhand).


Wow, beautiful. Thanks … for sharing all yr unique finds..


Thanks … Could you show some leaves. These two pictures on the net are contradictory. May be I have some in my database.

http://www.imageflora.com/image/polygonum-macrophyllum-or-persicaria-macrophylla-green-foliage-dark-pink-fl


I could not shot the plant with leaves, it was raining heavily.
However, attaching picture of a herbarium sheet showing leaves. Herbarium specimen is from Garhwal region of Uttarakhand. Attachments (1).
I still remember one of your picture resembling to P.macrophyllum. It was shot around Chopta in the same visit when you photographed Kashmiria himalaica (Scrophulariaceae). Though it was a small individual with just emerging inflorescence.


 

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Bistorta macrophylla (D. Don) Sojak is a common rainy season perennial herb in subalpine and alpine zones of Uttarakhand. Large, dense populations of this species colour the meadows red.
Photographs reproduced from optical photos taken by me nearly two decades ago.


Interesting upload … I am yet to see this beauty..

Persicaria sp. photographed from near Chopta in Uttarakhand.
Looks loke P. capitata but leaves appear to be larger, please help in ID.


Probably B. affine.


Sir, Chopta is too low altitude (27-2800m) for B.affine which occur above 3500m in Uttarakhand. It may be Bistorta macrophylla.


Thanks … for possible ID.


  

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Please validate .
Date: 23-25 Aug, 2014
Location: Dolakha,  Nepal
Altitude : 8000 to 12000  ft.at different locations.


Beautiful pictures!

To me it resembles to B. macrophylla.


I also agree with … comments


Further ID  validation request.
Bistorta vivipara (L.) S.F.Gray
Same location as above.
Attachments (3)


May be … can guide us better for differences between the two species: Bistorta vivipara & Bistorta macrophylla

I will go with … ID. 
As per flora of China, one of the major differences between B. vivipara and B. macrophylla is the presence of bulbills in the lower parts of the inflorescence in P. vivipara.
I cannot see any bulbil in the posted images. The compact inflorescence type also matches well with B. macrophylla.
Therefore, I am more convinced with B. macrophylla (D.Don) Sojak


In view of Ritesh ji’s comments, these may also be of Bistorta macrophylla

Polygonum macrophyllum D.Don (Polygonaceae) photographed in Khalya alpine meadow, Munsyari, Uttarakhand.
This time I remembered to shoot it with leaves. For the size of plant leaves are really large.

 

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Polygonaceae : Bistorta vivipara (l.) Gray : 2 posts by 2 authors. Attachments (2).

Please validate.
Date: 25 Aug, 2014
Location: Dolakha, Nepal
Altitude : 11000 ft.


Fine picture!
B.vivipara to me.


These may be of B. macrophylla as per comments by … in another thread


 

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