A new record of species Loxostigma fimbrisepalum K. Y. Pan (Gesneriaceae Dumort) for the flora of Vietnam

Do Thi Xuyen, Vu Xuan Phuong

Abstract


According to W. T. Wang et al., 1998 [9], the genus Loxostigma C. B. Clarke had about 7 species mainly distributed Asia. There were 4 Loxostigma species in Vietnam. This paper reported a new record of Loxostigma fimbrisepalum K. Y. Pan for the flora of Vietnam.
Loxostigma fimbrisepalum is herbs, stems 50-100 cm, sparsely puberulent, or near glabrescen. Leaves opposite, spread along stem; leaf blade ovate to broadly elliptic, 8-20  3.0-8 cm, apex acuminate, sparsely puberulent on both of surfaces. Cymes branched 2-5, 5-18-flowered; peduncle 5-20 cm; bracts ovate to broadly ovate. Pedicel 1-2 cm. Calyx 5-sect from near base; segments equal; corolla white or light green, inside yellow-brown with purple spotted, ca. 4.0-4.8 cm long, outside sparsely pubescent, inside glabrous; Stamens 4, coherent at the anther; staminode ca. 2 mm long. Pistil 2.2-2.5 cm, glabrous. Style 1.1-1.3 cm. Capsule 5-6 cm. Seed appendages 1.1-1.2 mm.
This species is closed to L. griffthii but differs by having as stem sparsely puberulent or near glabrous; corolla 4.0-4.8 cm long, white or light green; capsule 5-6 cm long.
Voucher specimens were collected in Hoang Lien - Sa Pa national park and Hoang Lien - Van Ban Nature reserve, Lao Cai province; Nguyen Binh district, Cao Bang province, deposited in the Herbarium of the Institute of Ecology and Biological Resources, Hanoi, Vietnam (HN).


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DOI: https://doi.org/10.15625/0866-7160/v33n4.779 Display counter: Abstract : 58 views. PDF : 28 views.

 

                 

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