My first reaction to dating it is that large iron plant stands were popular in the early 20th century, 1890-1920 and the late 1960s and 1970s. Since there was a craze in the late 1960s/1970s for reproducing styles from Aesthetics movement/Arts and Crafts it is hard to determine from style alone.
When I see iron plant stands from the Aesthetics period, they tend to be smaller, and with fancier embellishments. Though bamboo was a popular motif, the sort of wild asymmetrical arms would have been more popular in the 1970s. I could see this coming out of the shop of an eccentric artist/welder in 1895 or a hippy, boho shop in 1975 that tended to cater to Rhoda Morgenstern (or least likely a sort of thing bought by Sister Perish in the 1930s, to decorate a NE weekend house). Check the bottom, edges, etc closely for any factory/artist marks.
The decay/burning of the wood does seems to indicate age. The quality of the hardware/joining/welds might indicate period, or at least quality. Close ups of the feet, how the pieces are attached (as in how one bamboo rod is welded to another) and the actual metal plates that the wood screws into, might help to determine the quality if not the age.
This is the kind of thing I expect to see at 1stdibs, espically with the plant craze right now.
