Also known as Crucifixion thorn plants, Colletia is a surprising specimen filled with danger and whimsy. Gardeners are often searching for that unusual, second look plant for their landscape, and Crucifixion Thorn plants could provide just the right amount of drama and distinctive form. It is a tropical to sub-tropical specimen that has flat, wide triangular stems tipped with spines. These are grayish green and resemble an anchor or jet plant propeller, which leads to another common name, Jet Plane plant. From these, almond scented, creamy ivory flowers appear at the stem joints from summer until fall.

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Source: Gardening Know How