This vicious ball of spikes is a trifoliate orange plant. (Several of these "shrubs were planted in the 1960's inside the fence at the Brooklyn Botanic Garden in a successful effort to discourage trespassers"). The little citrusy fruits smell wonderful, but they're packed full of seeds and are extremely sour.
Day 690
A jewel amid the thorns
November 19th, 2013
Holy toledo! Those are SOME thorns! I’m sure you don’t want to mess with those!
Aha! I have one of these. Didn’t know its botanical name. Couldn’t resist its photo in the catalog. It was our anniversary tree one year. Seemed fitting.