''Pteroceltis'' is a genus of small trees in the family

Cannabaceae Cannabaceae is a small family (biology), family of flowering plants, known as the hemp family. As now Circumscription (taxonomy), circumscribed, the family includes about 170 species grouped in about 11 genera, including ''Cannabis'' (hemp), ''H ...

and containing the living species ''

Pteroceltis tatarinowii ''Pteroceltis tatarinowii'' a species of tree endemic to China and the only extant member of the genus ''Pteroceltis''. Common names include blue sandalwood, wingceltis or qing tan (). Trees grow to tall and are used for timber, the bark fiber ...

''. The genus is now restricted to an endemic range in China and Mongolia. The genus has a fossil record which includes species described from Korea, Japan, Germany, and the United States. The fossil record includes one described species from North America, '' Pteroceltis knowltoni'' from the

Middle Eocene The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', "dawn ...

Cockfield Formation The Cockfield Formation is a geologic formation in Mississippi. It preserves fossils dating back to the Paleogene period. See also * List of fossiliferous stratigraphic units in Mississippi * Paleontology in Mississippi The location of the s ...

in Tennessee, while an undescribed species is known from the

Klondike Mountain Formation The Klondike Mountain Formation is an Early Eocene (Ypresian) geological formation located in the northeast central area of Washington state. The formation, named for the type location designated in 1962, Klondike Mountain north of Republic, Wash ...

of Washington. One late Oligocene species ''

Pteroceltis tertiaria ''Pteroceltis'' is a genus of small trees in the family Cannabaceae and containing the living species ''Pteroceltis tatarinowii''. The genus is now restricted to an endemic range in China and Mongolia. The genus has a fossil record which include ...

'' has been described from strata near Rott, Germany. The largest diversity of fossils are from Asia, with '' Pteroceltis shanwangensis'' from the Miocene Shanwang flora in China, the Abura flora of Japan preserved '' Pterocarya ezoana'', and both '' Pteroceltis taoae'' plus '' Pteroceltis kungshimensis'' known from the Miocene Hoengyeong Formation in North Korea.

References

{{Taxonbar, from1=Q3487254 Cannabaceae Plants described in 1873 Trees of China Endemic flora of China Rosales genera