Planted this from a nursery labeled "mandarin orange". I'm guessing
that the orange branch had been grafted onto something else and died.
Maybe ornamental fruit? Definitely not edible... Has been giving fruit
for a few years now. Smells a little like a lemon only EXTREMELY bitter
-- so bitter you can't even taste a little without brushing teeth.
Original thought it was some exotic disease, but the tree/leaves don't
show any of the symptoms for those diseases.
Any ideas what it could be?
Fruit on tree
Fruit on tree 2
This is the best match I could find.....
Leaves: Alternate, Compound, Trifoliate
Citrus L. (sec. Mabberley 2004, Bayer et al. 2009); Poncirus Raf. (sec.
Swingle and Reece 1967; Cottin 2002)
Pseudaegle Miq. (sec. Swingle and Reece 1967)
Poncirus stands alone in [the true Citrus fruit trees] in having »
Trifoliolate: A compound leaf consisting of three leaflets.
"trifoliolate, » Deciduous: Falling off. "deciduous leaves and winter
buds well protected by bud scales. It has pleiomerous ovaries with six
to eight locules, with many ovules in each locule. In these ovarial
characters it agrees with Microcitrus and Citrus."
Trifoliate orange (Poncirus trifoliata) is a member of the citrus family
Rutaceae. Trifoliate refers to its leaflets of three leaves. This tree
has such formidable thorns that Dr. Hugh Conlon, retired extension
horticulturist, calls it "the barbed wire of the plant world." Also
called hardy or bitter orange, trifoliate is often planted as an
impenetrable hedge. Although it also bears fruit, they are seedy and
sour tasting. Its greatest commercial value lies in the hardiness of its
roots, which make it a preferred rootstock for grafting sweet orange
trees. Its thorns, however, will continue to grow below a graft union or
bud, even on citrus trees that do not typically bear thorns.
Trifoliate Orange, Poncirus trifoliata (syn. Citrus trifoliata), is a
member of the family Rutaceae, closely related to Citrus, and sometimes
included in that genus, being sufficiently closely related to allow it
to be used as a rootstock for Citrus. It differs from Citrus in having
deciduous, compound leaves, and pubescent (downy) fruit.
It is native to northern China and Korea, and is also known as the
Chinese Bitter Orange.
They are very bitter, are not edible fresh, but can be made into
marmalade, and when dried and powdered, they can be used as a condiment.
The fruits of Poncirus trifoliata are widely used in Oriental medicine
as a remedy for allergic inflammation
Poncirus trifoliata extract could possess a wide range of beneficial
activities for neurodegenerative disorders.[
Neurodegeneration is the umbrella term for the progressive loss of
structure or function of neurons, including death of neurons. Many
neurodegenerative diseases including Parkinson's, Alzheimer's, and
Huntington's occur as a result of neurodegenerative processes.