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... more about "Carduus tenuiflorus"
David J. Keil +
Curtis +
Slender-flowered thistle +
Calif. +, Oreg. +, Pa. +  and s Europe (Mediterranean region). +
0–1000 m +
Aggressive weed of waste ground, pastures, roadsides, fields +
Flowering spring–early summer (Apr–Jul). +
Fl. Londin. +
Introduced +
Carduus pycnocephalus var. tenuiflorus +
Carduus tenuiflorus +
species +