Xanthium strumarium

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Whole Plant in Ground

Flower Heads in Ground

Flower Heads in Ground, Close-Up


Distal Part of Branch

Leaves Top

Leaf Bottom

Leaf Top Close-Up

Leaf Bottom Close-Up

Early Flower Heads

Mature Flower Heads

Staminate Flower Head Top

Staminate Flower Head Top/Side

Staminate Floret, With Paleae

Staminate Floret, Paleae Removed

Pistillate Flower Head

Pistillate Florets, Inner Sides

Pistillate Floret, Outer Side

Pistillate Floret, Inner Side

Fruiting Head

Fruiting Heads, Longitudinal Sections

Achenes Split Lengthwise, Two Views