Quercus asymmetrica

{{Short description|Species of oak tree}}

{{Speciesbox

|image =

|status = EN

|status_system = IUCN3.1

|status_ref = {{cite iucn |author= Carrero, C. |author2= Strijk, J.S. |date=2020 |title= Quercus asymmetrica |volume=2020 |page= e.T78805106A173042077 |doi= 10.2305/IUCN.UK.2020-3.RLTS.T78805106A173042077.en |access-date=12 November 2022}}

|genus = Quercus

|display_parents = 2

|parent = Quercus sect. Cyclobalanopsis

|species = asymmetrica

|authority = Hickel & A.Camus

|synonyms_ref = [http://www.theplantlist.org/tpl1.1/record/kew-171675 The Plant List (accessed 11/7/2017)]

|synonyms =

Cyclobalanopsis patelliformis (Chun) Y.C.Hsu & H.Wei Jen

Quercus patelliformis Chun

}}

Quercus asymmetrica is an oak tree species in the beech family Fagaceae. It is found in China (specifically, Guangxi Province and Hainan Province, where it is called 托盘青冈 tuo pan qing gang) and northern Vietnam.{{cite journal |author= Min Deng |author2= Zhe-Kun Zhou |author3= Allen Coombes |name-list-style=amp|year= 2010|title= Lectotypification and new synonymy in Quercus subg. Cyclobalanopsis (Fagaceae)|journal= Novon|volume= 20|issue= 4|pages= 400–405|doi= 10.3417/2004208|bibcode= 2010Novon..20..400D |s2cid= 55587214 |url= http://hua.huh.harvard.edu/china/novon/novo-20-4-400.pdf}} It is placed in subgenus Cerris, section Cyclobalanopsis.{{Cite web |last1=Denk |first1=Thomas |last2=Grimm |first2=Guido W. |last3=Manos |first3=Paul S. |last4=Deng |first4=Min |last5=Hipp |first5=Andrew L. |date=2017 |title=Appendix 2.1: An updated infrageneric classification of the oaks |website=figshare |doi=10.6084/m9.figshare.5547622.v1 |url=https://figshare.com/articles/dataset/Appendix_2_1_________An_updated_infrageneric_classification_of_the_oaks/5547622/1 |access-date=2023-02-24 |format=xls |name-list-style=amp }}

Description

Quercus asymmetrica is a tree growing up to 15 m tall, with branchlets that are conspicuously angular when young; by second year, they become glabrous with occasional lenticels.

The leaves are leathery, elliptic to ovate-lanceolate, 50-120 × 25–60 mm and have 9-11 secondary veins on each side of mid-vein.

The acorns are oblate, 25–28 mm in diameter, greyish-brown, with a scar 15–20 mm in diameter, impressed or flat. The cupules are 20–30 mm in diameter. A persistent stylopodium is approximately 40 mm in diameter. In China, flowering is in May–June and acorns may be found in October–November of the following year.[http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=210000398 Flora of China: Cyclobalanopsis patelliformis (accessed 11/7/2017)]

References

{{cite web |url= http://www.catalogueoflife.org/annual-checklist/2014/details/species/id/9723234|title= Species 2000 & ITIS Catalogue of Life: 2014 Annual Checklist.|access-date= 26 May 2014 |author= Roskov Y. |author2= Kunze T. |author3= Orrell T. |author4= Abucay L. |author5= Paglinawan L. |author6= Culham A. |author7= Bailly N. |author8= Kirk P. |author9= Bourgoin T. |author10= Baillargeon G. |author11= Decock W. |author12= De Wever A. |editor= Didžiulis V.|year= 2014| publisher =Species 2000: Reading, UK.}}

Hickel & A.Camus, 1923 In: Bull. Mus. Natl. Hist. Nat. 29: 601

[http://apps.kew.org/wcsp/home.do WCSP: World Checklist of Selected Plant Families]