Amaranthus species

Amaranthus species;

Fruits & Vegetables Week : Amaranthaceae vegetable:  A common Amaranthaceae member leafy vegetable with flowers.
लाल माठ or राजगिरा in Marathi.

*Amaranthus gangeticus* ?
these are spectacular photos of this all-time favourite :)
in kolar district it grows in soil that is like rubble - no soil at all, and yet it grows.
i think it is a fantastic plant.
i grow it in my garden which is totally in the shade and it goes for days without water.
but having said all this i still do not know the botanical name
i feel i should stop writing for a few days.
...- thanks for this group and for your knowledge.
I think it is *Amaranthus cruentus* rather than *A. gangeticus.*
Please refer to following links.
A.gangeticus is an annual flowering plant with deep purple flowers

Adding my picture taken at Mahabaleshwar in a Strawbwrry field.
Hope it is the same plant.
May be one of these  A. blitum, A. dubious, and A. cruentus.
Amaranthus sp. (?) from Guwahati.:   Are attached images Amaranthus Sp.? Please ID for this.
Date :16/11/2012
Location: Maligaon, Guwahati-11 [Dist- Kamrup(Metro)]
Habitat: Grows on road side
Habit : shrub
Inflorescence : Spike
Fruits : not seen
Could it be Amaranthus polygonoides L.?
Searched FoP, FoNA & FoC, found two species may be similar to this - Amaranthus dubius Mart. ex Thell. & Amaranthus viridis L.; would go for the second one, for its lamina, resembles the illustration at FoP. But, pictures found in the group posts do not match.

Amaranthus for ID : Nairobi,Kenya : 120313 : AK-3 : Picture taken on 27/1/2009 in Nairobi, Kenya.
Found growing by the roadside.
Id please.