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Weed Seed: Blessed milkthistle/Milk thistle (Silybum marianum)

Family

Asteraceae

Distribution in Canada

Found in BC, AB, MB, ON, QC, NB, NS

Duration of life cycle

Annual or biennial

Seed/Fruit type

Achene - a one-seeded, dry fruit

Seed identification features

Size

Shape

Surface texture

Colour

Other structures

Similar species

Nodding thistle (Carduus nutans)

Photos

Photo - Blessed milkthistle (Silybum marianum) achene (side view)
Blessed milkthistle (Silybum marianum) achene (side view)
Photo - Blessed milkthistle (Silybum marianum) achene (edge view)
Blessed milkthistle (Silybum marianum) achene (edge view)
Photo - Blessed milkthistle (Silybum marianum) achene (close-up of peg at top)
Blessed milkthistle (Silybum marianum) achene (close-up of peg at top)
Photo - Blessed milkthistle (Silybum marianum) achene (top-down view)
Blessed milkthistle (Silybum marianum) achene (top-down view)
Photo - Blessed milkthistle (Silybum marianum) group of achenes
Blessed milkthistle (Silybum marianum) group of achenes

Similar species

Photo - Similar species: Nodding thistle (Carduus nutans) achene (side view)
Similar species: Nodding thistle (Carduus nutans) achene (side view)
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