Betula chinensis

Betula chinensis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fagales
Family:	Betulaceae
Genus:	Betula
Subgenus:	Betula subg. Aspera
Species:	B. chinensis
Binomial name
	Betula chinensis; Maxim.

Betula chinensis, commonly known as dwarf small-leaf birch,^[1] is a species of birch that can be found in China and Korea on the elevation of 700–3,000 metres (2,300–9,800 ft).^[2]

Description

The species is 5 metres (16 ft) tall with either yellow or yellowish-brown colour. Leaf blade is elliptic and ovate with a diameter of 1.5–6 centimetres (0.59–2.36 in) by 1–5 centimetres (0.39–1.97 in). Female species have a subglobose inflorescence which is also oblong with a diameter of 1–2 centimetres (0.39–0.79 in) by 0.6–1.5 centimetres (0.24–0.59 in). It peduncle is 1–2 millimetres (0.039–0.079 in) long while its bracts can be as long as 5–9 millimetres (0.20–0.35 in). Flowers bloom from May to June while the fruits ripe from July to August.^[2]

Taxonomy

Betula chinensis occurs in both hexaploid and octoploid forms. It appears to be a triple hybrid between B. calcicola, B. potaninii and B. chichibuensis. It is placed in section Asperae, subgenus Aspera.^[3]

References

^ English Names for Korean Native Plants (PDF). Pocheon: Korea National Arboretum. 2015. p. 373. ISBN 978-89-97450-98-5. Archived from the original (PDF) on 25 May 2017. Retrieved 25 January 2016 – via Korea Forest Service.
^ ^a ^b "Betula chinensis". 4. Flora of China: 308. {{cite journal}}: Cite journal requires |journal= (help)
^ Wang, Nian; Kelly, Laura J.; McAllister, Hugh A.; Zohren, Jasmin & Buggs, Richard J.A. (2021). "Resolving phylogeny and polyploid parentage using genus-wide genome-wide sequence data from birch trees". Molecular Phylogenetics and Evolution. 160: 107126. doi:10.1016/j.ympev.2021.107126. PMID 33647400. S2CID 232091362.

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[1] English Names for Korean Native Plants (PDF). Pocheon: Korea National Arboretum. 2015. p. 373. ISBN 978-89-97450-98-5. Archived from the original (PDF) on 25 May 2017. Retrieved 25 January 2016 – via Korea Forest Service.

[foc-2] "Betula chinensis". 4. Flora of China: 308. {{cite journal}}: Cite journal requires |journal= (help)

[WangKellMcAlZohr21-3] Wang, Nian; Kelly, Laura J.; McAllister, Hugh A.; Zohren, Jasmin & Buggs, Richard J.A. (2021). "Resolving phylogeny and polyploid parentage using genus-wide genome-wide sequence data from birch trees". Molecular Phylogenetics and Evolution. 160: 107126. doi:10.1016/j.ympev.2021.107126. PMID 33647400. S2CID 232091362.

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