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|Ponkan tree, Florida|
Ponkan (Chinese: 椪柑 (also known in Chinese as 芦柑); Citrus poonensis; "Chinese Honey Orange") is a high-yield sweet Citrus cultivar with large fruits in the size of an orange. It is a citrus hybrid (mandarin × pomelo), though it was once thought to be a pure mandarin.
"Pon" for its Japanese name "ponkan" is named after the city of Pune, India, and "kan(柑)" means citrus. The fruit is very sweet, round in shape and about 7–8 cm wide in size. Trees are heavy bearing every other year, and sometimes the limbs break due to the heavy yields. Growers resort to propping the limbs up with sticks at times, though if the limb bends gradually down and grows in that position it will do better in future years.
Trees can be propagated by seed, as they breed true, or grafted onto other rootstocks, trifoliate orange being the most popular. Andrew Willis of Apopka, Florida, promoted the Ponkan heavily in the early 1900s.
Ponkan is also noted for having a loose rind that is very easy to peel.
Ponkans are widely grown in Japan.
|2006 Citrus cultivation in Japan. 
It was originally introduced to the United States by Carlo Roman in 1880. His original grove is still in production, and under the care of Marion Holder near Hawthorne in Putnam County, Florida. The fruit is still very popular in the Melrose area, and often sold at roadside stands there. The city of Teresópolis in Brazil holds an annual Ponkan festival.
- Citrus depressa (shikwasa, hirami lemon), a similarly-sized sour citrus fruit widely used in Taiwan and Okinawa, Japan
- Citrus microcarpa (calamansi), a similarly-sized sour citrus fruit from the Philippines
- "椪柑". Retrieved 2018-02-12.
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- "2006 The area under cultivation of Mikan" (in Japanese). National Institute of Fruit Tree Science. Archived from the original on 2009-11-30.
- "2006 The area under cultivation of Citrus (except for Mikan)" (in Japanese). National Institute of Fruit Tree Science. Archived from the original on 2009-11-30.
- Festa da Ponkan, Teresópolis (Portuguese) Archived 2010-12-23 at the Wayback Machine