A new record of species Asarum cordifolium C. E. C. Fischer (Aristolochiaceae) for the flora of Vietnam

Nguyen Anh Tuan; Tran Huy Thai; Jenn-Che Wang; Chang-Tse Lu

doi:10.15625/0866-7160/v34n2.959

Author affiliations

Authors

Nguyen Anh Tuan Publishing House for Science and Technology, VAST
Tran Huy Thai Institute of Ecology and Biological Resources, VAST
Jenn-Che Wang National Taiwan Normal University
Chang-Tse Lu National Taiwan Normal University

DOI:

https://doi.org/10.15625/0866-7160/v34n2.959

Keywords:

Aristolochiaceae, Asarum cordifolium, Sa Pa (Lao Cai province)

Abstract

The genus Asarum L. comprised about 90 species, mainly distributed in East Asia (Chinna, Japan and Vietnam), North America and European. There were 7 species of Asarum recorded in Vietnam. This paper reported the species Asarum cordifolium C. E. C. Fischer newly recorded for the flora of Vietnam.

Asarum cordifolium C. E. C. Fischer: Herbs, rhizomes horizontal, height 15-25 cm, internodes 2-3 cm. Leaves solitary, 1-4; orbicular, 7-8 × 8-12 cm; leaf edges entire, villous; leaf blade densely white pubescents; petiole 12-20 cm, viollus; lateral veins 5. Single flower, red, white pubescents; peduncle 2 cm, densly white bubencents. Cataphylls lanceolate. Sepals free; lobes red, 1.2 × 2.0 cm; apex abuptly narrowed to a slender cauda 1-1.5 cm. Petals 3, needle, red, 0.3 cm. Stamens 12, filament as long as anthers, red-purple; connectives extended beyond anthers, tongue. Styles 6-connate, as long as anthers; apex entire. Ovary middle. Fl. Oct-Nov. Dense forest, moist valleys; 1.500-1.600 m. Sa Pa (Lao Cai province), Assam (India) and N Myanmar.