Teasel

More plant life -- sorry! But you should have seen the rejects :)

This is dipsacus: according to Wikipedia,
"The genus name is derived from the word for thirst and refers to the cup-like formation made where sessile leaves merge at the stem. Rain water can collect in this receptacle; this may perform the function of preventing sap-sucking insects such as aphids from climbing the stem. A recent experiment has shown that adding dead insects to these cups increases the seedset of teasels (but not their height), implying partial carnivory."

Here endeth my emergency blip.

Edit: I've just noticed it's Chamaeleo's 100th blipday. So please go over there and browse through some lovely nature blips if you haven't already discovered them.