A new record of species Radermachera microcalyx C. Y. Wu & W. Yin (Bignoniaceae) for the flora of Vietnam

Vu Xuan Phuong, Do Thi Xuyen, Dang Quoc Vu, Phung Van Phe, Dang Van Son

Abstract


The genus Radermachera Zollinger & Morit compcises about 16 species, mainly distributed in tropical Asia, there are 7 Radermachera species in Vietnam. During the study of specimen and documents of Gesneriaceae of Vietnam, we found Radermachera microcalyx C. Y. Wu & W. Yin in Lao Cai province, North Vietnam.

Radermachera microcalyx is tree, ca. 20 m tall. Leaves compound pinnately 1 times, ca. 40-60 cm long; leaflet 5-7 pairs, ovate or elliptic, ca. 11-26 × 4-6 cm, margin entire, lateral 6-10 pairs. Inflorescences thyrsus, terminal; calyx campanulate, 5 small teeth, apex truncate; corolla pale yellow, tube ca. 2-2,5 mm long; style filiform; capsule line, dehiscung by 2 valves; seeds many, minute. This species is closed to R. glandulosa but differs by having leaves dim glandular in abaxial, corolla tube 2.0-2.5 cm long, ca. 4-5 mm in diam. Voucher specimens were collected in Hoang Lien - Van Ban reserver, Lao Cai province and deposited in the Herbarium of the Institute of Ecology and Biological Resources, Hanoi, Vietnam (HN).


Keywords


Bignoniaceae, Radermachera, Radermachera microcalyx, Lao Cai, Vietnam



DOI: https://doi.org/10.15625/0866-7160/v34n3.2465 Display counter: Abstract : 82 views. PDF (Tiếng Việt) : 47 views.

 

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