maybe bamboo?

I have no clue what this is, just came up in my sister's flower garden and is spreading.

 

Looks like one of Amorphophallus species.

 

Looks like Dracunculus vulgaris. Common name Voodoo lily.

http://en.wikipedia.org/wiki/Dracunculus_vulgaris

http://www.google.co.uk/imgres?imgu...textMenu&rlz=1I7SUNA_en-GB&ndsp=20&tbs=isch:1

http://www.google.co.uk/images?q=Dr...sc=&um=1&ie=UTF-8&source=og&sa=N&hl=en&tab=wi

 

Amorphophallus paeoniifolius has young leaves folded in the similar way like on the photo.

 

I'd go with Amorphophallus paeoniifolius as well - she should have seen the distinctive blooms in those spots before the leaves came up. If they're sprouting in inconvenient places, she should be able to simply dig up the tubers and move them; I wouldn't eliminate them, as they're a native species and they're (in my opinion) really cool plants.

 

The reason I didn't think it was Amorphophallus paeoniifolius is, it is a tropical plant. Would this grow and spread outdoors in Eastern Tennassee?

Quote wiki......"Elephant foot yam is basically a crop of Southeast Asian origin. It grows in wild form in the Philippines, Malaysia, Indonesia, and other Southeast Asian countries. In India it is grown mostly in Kerala, Andhra Pradesh, Maharashtra and Orissa. In India it is popularly known as Jimmikand, Suran and Chenna."


Dracunculus is hardy.
Quote wiki....."It is native to the Balkans, extending as far as Greece, Crete and the Aegean Islands, and also to the south-western parts of Anatolia.[1]. It has been introduced to the United States and is currently present in the states of Oregon, California and Tennessee as well as the commonwealth of Puerto Rico.[2]"


http://en.wikipedia.org/wiki/Amorphophallus_paeoniifolius

http://www.google.co.uk/images?q=Am...sc=&um=1&ie=UTF-8&source=og&sa=N&hl=en&tab=wi

 

Amorphophallus konjac is quite cold hardy.
http://davesgarden.com/guides/pf/showimage/203057/
http://davesgarden.com/guides/pf/go/51598/

 

Thanks saltcedar for sorting out the hardiness issue.
Weird the way that they are growing them in Vienna, on top of the ground. See....

http://www.google.co.uk/imgres?imgu...b:IE-ContextMenu&rlz=1I7SUNA_en-GB&tbs=isch:1

 

Thanks so much for all the answers, it is Amorphophallus konjac, I now recall the very dark blossom and green flies but didn't realize they were associated. My sister's late husband had this in their sunroom and she decided it should be outdoors. I can see why now. Phew!!!!