This is strawflower. Formerly called Bracteantha bracteata, the current scientific name of strawflower is Xerochrysum bracteatum. This is an Asteraceae plant, as it appears to be, but it only has disk flowers. What appear to be ray flowers are not flowers but papery involucral bracts.
The Horticulture gardens were mostly cleared out for the winter last Tuesday Nov. 24. There are now just a few things growing there and of course the trees are still there.
The Musa basjoo banana was just today taken inside. Here is a picture of it a few days ago, November 2, 2009. It is tough enough to stand a few days of Indiana November. Notice the ensete had been taken away before this.
A few varieties of Miscanthus sinensis ornamental grass can be viewed at Purdue Horticulture Gardens. The picture shows Maiden grass, Miscanthus sinensis 'Gracillimus', November 2, 2009.