Spiky Plant, Often a Weed
Puzzle 13 of Alice in Wonderland Piece of Cake Pack
Question is: Spiky Plant, Often a Weed
and the answer is: THISTLE
Word Meaning:
THISTLE — Any of several perennial composite plants, especially of genera Cirsium, Carduus, Cynara, or Onopordum, having prickly leaves and showy flower heads with prickly bracts.
Definitions from Wiktionary.