Quercus stenophylloides
{{short description|Species of plant}}
{{Speciesbox
| image = Arisan Oak 2016.png
| image_caption = Acorns and leaves of Arisan oak from Taiwan
| status = LC
| status_system = IUCN3.1
| status_ref = Carrero, C. 2020. [https://www.iucnredlist.org/species/78976949/78976963 Quercus stenophylloides]. The IUCN Red List of Threatened Species 2020: e.T78976949A78976963. https://dx.doi.org/10.2305/IUCN.UK.2020-3.RLTS.T78976949A78976963.en. Accessed 4 March 2023.
| genus = Quercus
| display_parents = 2
| parent = Quercus sect. Cyclobalanopsis
| species = stenophylloides
| authority = Hayata
| synonyms =
- Cyclobalanopsis stenophylloides (Hayata) Kudô & Masam, 1930
- Quercus salicina var. stenophylloides (Hayata) S.S. Ying, 1988
- Quercus salicina var. asiatica C.F.Shen
- Quercus salicina var. stenophylloides (Hayata) S.S.Ying
}}
Quercus stenophylloides, also called Arisan oak, is a species of evergreen, broad-leaf tree endemic to Taiwan.{{Catalogue of Life | 2ad67c76c29e4ee475d1070a9cad259b }} It is placed in Quercus subgenus Cerris, section Cyclobalanopsis.{{Cite journal |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 stenophylloides can grow up to 15 m (49 ft) tall, with trunks up to 40 cm (16 in) wide. They have gray branchlets with lenticels.{{Cite web|url=http://tai2.ntu.edu.tw/PlantInfo/species-des.php?code=306%20003%2013%200|title=狹葉櫟 Cyclobalanopsis stenophylloides - Plants of TAIWAN 台灣植物資訊整合查詢系統|website=tai2.ntu.edu.tw|access-date=2019-03-24}}
= Leaf =
Leaf shape can range from lanceolate to ovate-oblong, 6–14.5 cm (2.4–5.7 in) long, 1.2–4.2 cm (0.5–1.7 in) wide, acuminate at apex, and acute or obtuse at base.
They are green on the upside, grayish-white, glaucous or green and hairy beneath.
The texture is coriaceous. Echinate-serrate on the edge. Midribs are concave above, elevated beneath. There are 9–17 pairs of lateral veins. Petioles are 1–2.3 cm (0.4–0.9 in) long.
= Flower =
Blooming from May to June, the flowers are unisexual and are both small, hairy, growing on the same individual tree.
Both are arranged on a stem, only staminate flowers' are a lot longer. Also, staminate flowers are arranged spirally on a slim drooping stem — this is called catkins.
Staminate catkins are about 5 cm (2 in) long; Staminate flowers are about 3.5 mm (0.14 in) long; 4–6 perianths, lobed, hairy outside, glabrous inside; 4 - 9 stamens, filaments 2.5 mm (0.1 in) long, anthers 1 mm(0.04 in) long.
Pistillate flowers are 2 mm (0.08 in) long, and 3.5 mm (0.14 in) wide; 3–4 perianths, lobed, hairy, 3–4 styles, curved.
= Fruit =
Fruits mature from October to November. They are first green, then brown and fall to the ground when mature. The cupules are 0.9–1.2 cm (0.4–0.5 in) long, 1.3–1.5 cm(0.5–0.6 in) across, scales in 8–9 concentric rings, tomentose, margins of rim dentate-serrate; nuts ellipsoid, 1.7–2.1 cm (0.7–0.8 in) long, 1.2–1.6 cm (0.5–0.6 in) across.