What is "thimbleweed"

Thimbleweed \Thim"ble*weed`\, n. (Bot.) Any plant of the composite genus Rudbeckia, coarse herbs somewhat resembling the sunflower; -- so called from their conical receptacles.

n. 1 (context botany English) Any of various plants whose heads resemble thimbles, including 2 # (taxlink Rudbeckia laciniata species noshow=1) 3 # (taxlink Anemone virginiana species noshow=1) 4 # (taxlink Anemone cylindrica species noshow=1)

n. a common North American anemone with cylindrical fruit clusters resembling thimbles [syn: Anemone cylindrica]

Thimbleweed is the common name of any of several plants with seed heads resembling a thimble.

Species called thimbleweed include:

• Rudbeckia laciniata
• Anemone cylindrica
• Anemone nemorosa
• Anemone virginiana