Sonchus asper
(Prickly Sow-Thistle)

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Whole Plant in Ground

Stem Cross Section

Lower Third of Plant

Middle Third of Plant

Upper Third of Plant

Lower Leaf Top

Lower Leaf Bottom

Middle Leaf Top

Middle Leaf Bottom

Mid-Upper Leaf Top

Mid-Upper Leaf Bottom

Upper Leaf Top

Upper Leaf Side

Middle Leaf Base Close-Up

Flower Head Top

Flower Head Side

Flower Head Longitudinal Section

Ray Floret

Ray Floret