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.

Flower