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Blackstonia perfoliata ( L.) Hudson
. ( Yellow wort )
Annual herb of the Gentian
family - Gentianaceae - up top 40 cm. Erect stems,
glabrous, glaucous . Basal leaves in rosette.
Leaves on the stem perfoliate.
Yellow flowers, in loose inflorescences with 6 or 8 petals.
Fruit in capsule. In
sandy calcareous soils and dry grasslands.
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