Pterocarya tonkinensis (Franch.) Dode-Tonkin Wingnut

Pterocarya tonkinensis (Franch.) Dode, Bull. Soc. Dendrol. France 67 (1929).

Pterocarya tonkinensis (Franch.) Dode; Photos Tran Minh Phuong

Vietnamese name: 

Cơi bắc bộ, Lá ngón, Lá cơi, Mạy slam (Thái)

Chinese name: 

越南枫杨 yue nan feng yang

English name: 

Tonkin Wingnut

Latin name: 

Pterocarya tonkinensis (Franch.) Dode

Family: 

Juglandaceae 

Synonym name:

Pterocarya stenoptera var. tonkinensis Franch.

Description: 

Large tree to 30 m. Bark whitish-grey, becoming fissured. Terminal buds naked. Leaves usually paripinnate, occasionally imparipinnate, to 18 cm or more; rachis wingless, sometimes ridged or sulcate, pubescent or becoming glabrous; leaflets 6–14, sessile, 9–17 × 3–7 cm, ovate or elliptic-ovate, glabrous below except for hairs on midrib and larger veins, base oblique, rounded or broadly cuneate, apex acute to acuminate, margins sharply serrate; petiole 4.5–7 cm. Infructescence 13–30 cm. Nutlets rhomboid, 6–7 mm, glabrous, with narrow to linear wings 1–1.7 × 2–6 mm

Flower and fruid season: 

III-IV; 6-10 

Distribution: 

This species is in China Southern Yunnan, perhaps also western Hubei, Shaanxi, Sichuan provinces. Laos Vietnam North and central. In VietNam, It found in Lai Châu, Sơn La (Sông Mã, Mộc Châu), Tuyên Quang, Phú Thọ, Hòa Bình, Thanh Hóa, Nghệ An. 

Ecological: 

The tree grows naturally along rivers and streams throughout the mountains and midlands, at an altitude of 100-1000 m. 

Chemical: 

Eighteen compounds were identified from the methanol extract of Pterocarya tonkinensis, including two new natural products 1 and 2: 1, pterocaryalactone; 2, pterocaryafuranone; 3, (1S, 6R)‐9‐hydroxymegastigm‐7‐en‐3‐one; 4, (S)‐dimethyl malate; 5, α‐linolenic acid; 6–8, α‐tetralones; 9, (R)‐methyl‐2‐hydroxyl‐3‐phenyl‐propanoate; 10, (E)‐4‐hydroxycinnamic acid methyl ester; 11–14, diarylheptanoids, and 15–18, pentacyclic triterpenoids

Uses: 

Curing scabies, ringworm (Leaf). Plants are poisonous so pay attention when using.

Reference: 

- theplantlist.org

- efloras.org

- ipni.org

- treesandshrubsonline.org/ref/g/#12601

- Ngo, Men & Han, Jae & Nguyen, Minh & Dang, Quang & Kim, Hun & Choi, Gyung. (2020). Antifungal properties of natural products from Pterocarya tonkinensis against phytopathogenic fungi. Pest Management Science. 10.1002/ps.6211.