Quercus chrysocalyx

Quercus chrysocalyx^[1] is a tree species in the beech family Fagaceae; there are no known subspecies.^[2][3] It is native to Cambodia, China (Yunnan), Laos, Thailand, and Vietnam.^[4] It is placed in subgenus Cerris, section Cyclobalanopsis (the ring-cupped oaks).^[5]

Quercus chrysocalyx
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fagales
Family:	Fagaceae
Genus:	Quercus
Subgenus:	Quercus subg. Cerris
Section:	Quercus sect. Cyclobalanopsis
Species:	Q. chrysocalyx
Binomial name
Quercus chrysocalyx Hickel & A.Camus
Synonyms
Cyclobalanopsis chrysocalyx (Hickel & A.Camus) Hjelmq.

This oak tree grows up to 15 m tall, with large acorns – 25–30 mm, and has been recorded from Vietnam, where it may be called sồi quang.^[6]

Taxonomy & naming

Quercus chrysocalyx was first described in 1921 by Paul Robert Hickel and Aimée Antoinette Camus.^[1] The species epithet, chrysocalyx, is derived from the Greek chrysos ("gold") and kalyx, ("cup" or "calyx"), and describes the plant as having golden calyces.^[7][8]