Greek thistle, Ptilostemon afer (Barbary or twin-thorned thistle, Cnicus afer). Handcoloured copperplate engraving by Weddell after an illustration by John Curtis from Samuel Curtis's "Botanical Magazine," London, 1822.
Greek thistle, Ptilostemon afer (Barbary or twin-thorned thistle, Cnicus afer). Handcoloured copperplate engraving by Weddell after an illustration by John Curtis from Samuel Curtis's "Botanical Magazine," London, 1822.