Quercus helferiana

Quercus helferiana
Scientific classification
Kingdom:Plantae
Clade:Angiosperms
Clade:Eudicots
Clade:Rosids
Order:Fagales
Family:Fagaceae
Genus:Quercus
Subgenus:Quercus subg. Cyclobalanopsis
Species: Q. helferiana
Binomial name
Quercus helferiana
A.DC. 1864
Synonyms[1]
  • Cyclobalanopsis helferiana (A.DC.) Oerst.
  • Quercus ilex Lour.
  • Quercus prainiana H.Lév. 1913 not Trel. 1924

Quercus helferiana is a species of tree in the family Fagaceae and the "ring-cupped oak" sub-genus. It is native to Vietnam, Thailand, Laos, Myanmar, India, and southern China (Yunnan, Guangdong, Guangxi, Guizhou).[2]

Description

Quercus helferiana is a tree up to 20 m. tall, with a trunk up to 0.3 m in diameter. Leaves oblong-elliptic, to elliptic-lanceolate, 120-150 (up to 220) × 40-80 (up to 95) mm, with wavy edges but no teeth or lobes.[2] The acorn is oblate, 10-16 × 15–22 mm, grey, with a depressed apex and often covered with shaggy hairs; the scar is 12–14 mm in diameter, flat to concave at maturity. Flowering is in March–April, acorns found from October–November.

References

  1. ↑ The Plant List, Quercus helferiana A.DC.
  2. 1 2 Flora of China, Cyclobalanopsis helferiana (A. de Candolle) Oersted, 1867, 毛枝青冈 mao zhi qing gang


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