Torenia concolor Lindl.

 Torenia concolor Lindl., Edwards's Bot. Reg. 32: t. 62 (1846).

Torenia concolor
Torenia concolor
Torenia concolor
Torenia concolor
Torenia concolor

Torenia concolor Lindl.; Photos Hoang Thanh Son

Vietnamese name: 

Tô liên cùng màu

Chinese name: 

单色蝴蝶草 dan se hu die cao

Common name:

(Japanese common name) turu-urikusa [vine urikusa (urikusa = Lindernia crustacea)]

(English common name) Kyushu (Amami Islands), Okinawa

Latin name: 

Torenia concolor Lindl.



Synonym name:

Torenia concolor var. formosana T. Yamaz.

Torenia radicans Vaniot

Torenia rubens Benth. ex Maxim.


Herbs, creeping. Stems quadrangular, rooting from nodes; branches ascending or erect. Petiole 2-10 mm; leaf blade triangular-ovate, narrowly ovate, or rarely ovate-orbicular, 1-4 X 0.8-2.5 cm, glabrous or sparsely villous, base broadly cuneate to subtruncate, margin serrate or crenate and serrate, apex obtuse to acute. Flowers axillary or terminal, solitary or in fascicles. Pedicel 2-3.5 cm, to 5 cm in fruit. Calyx 1.2-1.7 cm, to 2.3 cm in fruit, base decurrent; wings 5, slightly more than 1 mm wide; lips narrowly triangular with 5 small lobes evident in fruit. Corolla blue to blue-purple, 2.5-3.9 cm, exceeding calyx lobes by 1.1-2.1 cm. Anterior stamens appendages filiform, 2-4 mm. Capsule 1.5-1.8 cm. 

Flower and fruid season: 



This species is distributed in China, Japan (Ryukyu Islands), Laos, Vietnam. In VietNam, found in Vĩnh Phú, Nghệ An.


The tree grows naturally in moist areas along the forest, roadside, and wasteland, at an altitude of 300-1,800 m.


lupeol (1), ß-sitosterol and stigmasterol (2) ' betulin (3) ' betulinic acid (4)  oleanolic acid (5) 'maslinic acid (6) alphitolic acid (7) ' 3-epimaslinic acid (8); augutic acid (9) ' ß-sitosterol-3-0-~-D-glucoside (10)

Pharmacological effects: 

Analgesic and anti-inflammatory activities


Acute hepatitis, nephritis, edema, amoebic dysentery, hemorrhoids (whole tree).





- Chih-Wen Ding, Li-Kang Ho,Yuan-Shiun Chang; J. Agri. & Fore. : 54(1) 69~ 76(2005)

- Lin YC, Cheng HY, Huang TH, Huang HW, Lee YH, Peng WH. Analgesic and anti-inflammatory activities of Torenia concolor Lindley var. formosana Yamazaki and betulin in mice. Am J Chin Med. 2009;37(1):97-111.

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