soursop

noun

1. A small tropical evergreen tree, Annona muricata.
2. The tart, spiny, yellow-green fruit of this tree.

   “For a plant whose preferred growing region is the temperate zone of North America, the pawpaw is an uncannily exotic-tasting delicacy, a far-flung cousin of the tropical soursop, or guanábana.”

3. Bermuda buttercup (Oxalis pes-caprae), an edible wood sorrel native to South Africa

   “[see the title already]”

4. (broadly)Bermuda buttercup (Oxalis pes-caprae), an edible wood sorrel native to South Africa

   “Soursop. Mr. J. E. Taylor read a short paper on the “Soursop” (Oxalis). It was to be regretted that those who introduced this weed were not better acquainted with its habits.”

   “Unmanured soils growing sorrel, soursop (Oxalis spp.) and similar acid-loving plants, will usually produce pasture and other forages low in both lime and phosphoric acid. […] Similarly, lime is required to neutralize many acids which are characteristic of some plants such as sorrel, soursop, rhubarb, &c.”