Quercus helferiana
Scientific classification Edit this 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. 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 beech family Fagaceae. It is native to Vietnam, Thailand, Laos, Myanmar, India (northeast), and southern China (Yunnan, Guangdong, Guangxi, Guizhou).[2] It is placed in subgenus Cerris, section Cyclobalanopsis.[3]

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
  3. ↑ Denk, Thomas; Grimm, Guido W.; Manos, Paul S.; Deng, Min & Hipp, Andrew L. (2017). "Appendix 2.1: An updated infrageneric classification of the oaks" (xls). figshare. Retrieved 2023-02-24.


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