The artichoke bit is because they're supposed to be a bit like globe artichokes.
From the guardian.co.uk
How to prepare a globe artichoke for steaming, boiling or microwaving.
From the newsday.com
But was the doctor too proud to ask the waiter about the globe artichoke?
From the guardian.co.uk
Parts of the bed can be dedicated to ornamental edibles such as globe artichoke, with its sculptural, silver leaves.
From the nzherald.co.nz
A diner who needed medical attention after consuming an entire globe artichoke is suing the restaurant that served it.
From the guardian.co.uk
It's a long time since I have eaten globe artichoke but the very idea of eating even one leaf seems impossible.
From the guardian.co.uk
For me, it's unthinkable to do anything with a globe artichoke other than to cook it whole and serve it with vinaigrette.
From the guardian.co.uk
Behind may be slightly taller rhubarb, or globe artichoke, then low shrubs and bushes such as tayberries and blackcurrants.
From the guardian.co.uk
Taller cool-season foliage like Cardoon, a globe artichoke relative, is a great companion offering a nice backdrop with its soft, gray, jagged foliage.