Citrus taiwanica

There is a citrus tree currently laden with fruit on the Armstrong campus at the corner of Arts Drive and Library Drive outside the Science Center.

Many times, I have observed students pick one of the large bright yellow fruits and attempt to eat it only to realize that the tree really lives up to its common name of sour orange.

Citrus taiwanica, commonly known as Nansho Daidai sour orange, grows into a vigorous, upright-spreading, and very thorny small tree. The juicy orange-sized fruit are usually not eaten fresh because of their acid-sour and bitter taste but are sometimes used as a lemon substitute.

Most sour oranges are quite cold hardy, tolerating temperatures in the upper teens with no damage.

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