BugwoodWiki Article

bull cottonthistle
Onopordum tauricum Willd.

Overview

Appearance
Onopordum tauricum is a biennial herb that can grow up to 8 ft. (2.4 m) tall.
Foliage
The leaves of O. tauricum are bright green in color and from 3.9-9.8 in. (10-25 cm) long. Leaves are covered with short hairs, are acutely triangular and have toothed lobes.
Flowers
Onopordum tauricum flower heads are spherical and bright purple to pink in color. They are from 3-4 in. (7.6-10.2 cm) in diameter with numerous spiny bracts. Flowering occurs in summer.
Fruit
Fruits are from 0.2-0.24 in. (5-6 mm) long. Each fruit contains several white to tan seeds from 0.31-0.39 in. (8-10 mm) long. Seeds have short bristles. This plant reproduces by seed.
Ecological Threat
Onopordum tauricum prefers disturbed areas including fields and roadsides. It is native to temperate Asia and eastern Europe.

Image Sets
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Maps


EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

EDDMapS Distribution

State Invasive List - This map identifies those states that list this species on their invasive species list. For more information, visit Invasive.org

State Invasives List

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Asteridae
Order: Asterales
Family: Asteraceae
Genus: Onopordum

Other System Links

Plants: ONTA
GRIN: 401780
ITIS: 38141
NPDN Pest: PBFCNCA

Synonyms and Other Names

Other Common Names:
Scotch thistle, taurus cotton thistle

Categories

Category: Forbs/Herbs