Fishbone thistle (Ptilostemon diacantha)

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Fishbone thistle is a rosette-forming, evergreen biennial or short-lived perennial with long, narrowly lance-shaped, lobed, spiny, white-veined, grey-green leaves and upright, branching stems bearing clusters of purple, thistle-like flowers in summer.

Winterhardy evergreen biennial
Height 50 cm
Width 50-60 cm
Spacing 30-50 cm (5 pc/m2)
Flowering time VII-VIII
Site sunny, dry to medium moist, well drained soil. 
Usage solo plant, groups
Propagation seeds