Sow-thistle, spiny annual, Sonchus asper

Life Cycle

Annual, reproducing only by seed.

Figure #1.

A. Base of plant. B. Leaf from lower or mid-stem. C. Top of flowering stem.

Figure #2.

2 leaf annual sow-thistle with the round to oval cotyledons (first leaves)

Figure #3.

Figure #4.

Figure #5.

The characteristic stem leaves having two spiral auricles that clasp the stem.

Figure #6.