monarchs and swan plants

[Jsbtfly at aol.com]

A friend of mine in New Zealand was describing how she had planted a "swan 
plant" which attracted Monarchs like crazy this past NZ summer. She said she 
saw lots of caterpillars all summer and is still seeing them as it cools 
down. She reported that most of them would pupate on the side of her house 
near the plant. Also that many New Zealanders get this plant for the purpose 
of attracting Monarchs.
Is anyone familiar with this plant, and Monarch attraction to it? (I included 
a bit of her description below)

J. Smith

<< They call it a swan plant here. Very different looking. Not something you 
would plant for its beauty as it has a small slender leaf, small bell like 
flowers, followed by these pouches. All in the same green. I guess the 
caterpillers like the leaves. Yes, they are monarchs. I think I may have read 
that monarchs have been introduced to NZ. >>