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Persicaria sp. Hooghly 01-Jan-2013 sk1: Found this Persicaria on the edge of a rice-field beside a ditch-cum-irrigation channel. Could this be Persicaria minor (Huds.) Opiz?

Species : UNKNOWN
H & H : slender herb, about 2 ft tall
Date : 2/12/12
Place : Hooghly


Not P. minor!
Probably your plant is Persicaria mitis (Shrank) Holub but can be confirmed only after the careful examination of the plant/specimen.
Let me inform you that P. minor, P. mitis and P. hydropiper are very close species, known to hybridize among each other and often misidentified. Even the intermediate forms have also been reported (Parnell, 1988). P. minor are supposed to have an erect spike whether the other two having nodding ones (a character clearly visible in your photographs). Please also be noted that the ochrea and nut characters are very important to identify the Polygonum (s.l.) sps. which I would like to see in your next post. Please remember that the identity of another Persicaria from Hooghly is still pending because of the unavailability of mature nuts. However, the most important difference between the above-mentioned three species is probably the number of perianth glands which are ca.12 in P. mitis, Nil (0) in P. minor and ca.83 in P. hydropiper. Besides, there are minor variations in nut character and ochrea tooth lengths.
Hope I am not putting you in more trouble. 🙂
Would like to hear from our experts too.


I agree fully, it is not Persicaria minor (Huds.) Opiz.
I agree that clear pictures of ochrea and, if possible, nuts are very important to ID Persicaria.
But, “glands in perianth” is surely troublesome to me!


I fully agree with … identification. With its elongated nodding inflorescence it is not P. minor and unlike the plant in this thread P. hydropiper is a stoutish herb.
So, i also think that it is P. mitis as have been identified by …


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Polygonaceae Fortnight: Persicaria mitis from Kashmir pl. validate-GSMAY41 : 2 posts by 2 authors. Attachments (5).

Possibly Persicaria mitis, photographed from Dachhigam Kashmir
Please validate


Beautiful photos! Thanks for sharing!


 
 
 
 
 

References:

Annonated checklist of the flowering plants of Nepal (Author
citation different from The Plant List)

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