Quercus gemelliflora

{{Short description|Species of oak tree}}

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| image =

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| genus = Quercus

| display_parents = 2

| parent = Quercus sect. Cyclobalanopsis

| species = gemelliflora

| authority = Blume

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| synonyms = Quercus turbinata var. crassilamellata
Quercus turbinata Blume
Quercus semiserrata var. mannii
Quercus merkusii Endl.
Quercus lineata var. merkusii
Quercus horsfieldii var. longifolia
Quercus horsfieldii Miq.
Quercus crassilamellata (Gamble) A.Camus
Cyclobalanopsis turbinata (Blume) Schottky
Cyclobalanopsis merkusii (Endl.) Oerst.
Cyclobalanopsis horsfieldii (Miq.) Oerst.
Cyclobalanopsis gemelliflora (Blume) Oerst.

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Quercus gemelliflora is a tree species in the beech family Fagaceae. there are no known subspecies. It is placed in subgenus Cerris, section Cyclobalanopsis (the ring-cupped oaks).{{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 }}

It has been recorded from Malaysia, Indonesia and Vietnam (where it may be called sồi song sanh). The tree, grows from 15 to 30 m tall.Phạm Hoàng Hộ (2003) Cây Cỏ Việt Nam: an Illustrated Flora of Vietnam vol. II publ. Nhà Xuẩt Bản Trẻ, HCMC, VN