Xanthium strumarium
(Cocklebur)

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Whole Plant in Ground




Flower Heads in Ground


Flower Heads in Ground, Close-Up


Stem


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