Treatments of Polygonum and related genera (subfamily Polygonoideae) those by Haraldson and Ronse Decraene & Akeroyd, have segregated species of Polygonum in the broad sense adopted into two separate tribes, Polygoneae and Persicarieae. The remainder of Polygonum in the broad sense is generally assigned to Persicaria (or a varying number of segregate genera, such as Aconogonon and Bistorta) which, with Antenoron and Koenigia, comprises the tribe Persicarieae.
Characters for segregation of Two species:
Polygonum: . Flowers axillary, solitary or in small clusters, sometimes forming lax leafy spikes. Perianth (4- or)5-parted, not enlarged in fruit. Stamens 5-8, reduced in number in outer whorl; filaments, especially the inner, strongly dilated at base.
Persicaria: Inflorescence spicate, spikes usually several. Tepals fused for about 1/3 their length. Nectaries free, globular. Styles 1, bifid or trifid.
Species with description &
pictures in Flowers of India as on 16.3.14:
ganderbalensis (? Polygonum ganderbalense Munshi & Javeidis a synonym of Polygonum aviculare L.)
plebeium R. Br.
recumbens Royle ex Bab.
sinuatum Royle ex Bab.
is a synonym of Persicaria sinuata (Royle ex Bab.) Rajbh. & R.Joshi
tubulosum Boiss. = Aconogonon tortuosum (D. Don) H. Hara
Flora of Davanagere District, Karnataka, India By B. K. Manjunatha, V. Krishna, T. Pullaiah (2004)- Details with keys–
Forest Plants of Eastern India By Amal Bhusan Chaudhuri (1993)-
Polygonum sinuatum Royle ex Bab. is a synonym of Persicaria sinuata (Royle ex Bab.) Rajbh. & R.Joshi
Gardening in India By George Marshall Woodrow, G Marshall (1986)- Details-
Aquatic and Semi-aquatic Plants of the Lower Ganga Delta: Its Taxonomy … By Kumudranjan Naskar (1990)- Details with keys-
Persicaria, Polygonum, Aconogonon, Bistorta, Fagopyrum, Fallopia, Koenigia, & Rubrivena : 2 posts by 1 author.
Attempts have been made to incorporate most of the species available in India & nearby areas with details & keys directly or through links as far as possible. It’s quite possible that there may be some discrepancy in the accepted names & synonyms taken from other links.
Species discussed so far in efloraofindia are given at the bottom of the page in the form of links against Subpages. On clicking them one can see all the details.
If someone can provide complete list of Indian species with source references it will be wonderful.
Any comments/ corrections are welcome.
In my opinion most of the above genera should be treated under Polygonum sensu lato. I am working on Indian Polygonaceae but it needs thorough field work. The taxonomic complexes are to be solved with the help of SEM/Molecular studies. I have listed all Indian species but it is not yet published.
Thanks a lot, … I have taken GRIN as the basis as it relied on the latest litrature published in 2011 or 2012. Other efloras & The Plant List etc. has also been considered where ever a taxa is not available in GRIN.
As & when new findings are published it can be updated again.