Wildflowers Identified: Field Thistle
You can search Google Images for images of this wildflower.
Field Thistle has these characteristics:
- in a head (7 or more petals): cluster of stalkless (or nearly stalkless) flowers
- single flower on stem
- several flowers on stem
- 1 to 2 inches flower width
- pink to red flower color
- blue to purple flower color
- blooms in July
- blooms in August
- blooms in September or later
- plant height two feet or more
- leaf petiole present (has a leafstalk)
- leaf petiole absent (has no leafstalk)
- alternate leaf arrangement on the stem
- leaf edge has at least 4 teeth per inch
- irregular leaf edge
- deeply cut leaf edge
- branched leaf veins
- simple leaves about 1 1/2 to 5 times as long as wide
- simple leaves over 5 times as long as wide
- stem is hairy or spiny
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Eric Haines,
erich@acm.org