Monday, July 11, 2016

[Botany • 2015] Billolivia tichii • A New Species (Gesneriaceae) from Bidoup-Núi Bà National Park, Central Highlands of Vietnam


Billolivia tichii  Lưu, Q.D.Nguyễn & N.L.Vũ
FIGURE 1. Billolivia tichii. A. Habit. B. Petioles. C. Abaxial lamina. D. Adaxial lamina. E. Inflorescence. F. Flowers, side view. G. Corolla lobes, dorsal view. H. Longisection of corolla. I. Stamen.
 Photos: Phạm Hữu Nhân, Nguyễn Quốc Đạt, Nguyễn Thiện Tịch and Đặng Minh Trí.
 DOI:  10.11646/phytotaxa.219.2.9     

Abstract

The genus Billolivia D.J.Middleton in Middleton et al. (2014a: 255) of the Gesneriaceae was recently established with five species, namely B. longipetiolata (Middleton et al. 2014a: 256), B. minutiflora (Middleton et al. 2014a: 258), B. poilanei (Middleton et al. 2014a: 260), B. vietnamensis (Middleton et al. 2014a: 261) and B. violacea (Middleton et al. 2014a: 262). The sixth taxon of the genus, B. moelleri, was described shortly after in Middleton et al. (2014b: 189). Our continued search for the genus in southern Vietnam has gathered several other possible new taxa that are under examination. In this paper, we describe one of them as a new species from Bidoup-Núi Bà National Park.

Keywords: Gesneriaceae, Billolivia, new species, Eudicots, Vietnam



FIGURE 1. Billolivia tichii.
A
. Habit. B. Petioles. C. Abaxial lamina. D. Adaxial lamina. E. Inflorescence. F. Flowers, side view. G. Corolla lobes, dorsal view. H. Longisection of corolla. I. Stamen.  
Photos: Phạm Hữu Nhân, Nguyễn Quốc Đạt, Nguyễn Thiện Tịch and Đặng Minh Trí.

Billolivia tichii Lưu, Q.D.Nguyễn & N.L.Vũ, sp. nov. (Fig. 1)
Allied to Billolivia longipetiolata in having generally long pubescent petioles, coarsely dentate leaf margins and similar flower shape but it differs in having obovate to elliptic leaves, ellipsoid calyx, purple lines on the corolla throat and the base of lobes and red dot in the middle of filaments.

Type :— VIETNAM. Lâm Đồng Province: Lạc Dương District, Đạ Chais Commune, Bidoup-Núi Bà National Park, W slope of Gia Rích mountain ridge, 18 November 2014, Lưu Hồng Trường, Nguyễn Quốc Đạt, Phạm Hữu Nhân, Nguyễn Thế Văn LUU, DAT, NHAN &
VAN 1106 (holotype SGN!; isotypes SGN!, VNM!, DLU!, HNU!, HN!, VNMN!).


Ngọc Long Vũ, Hữu Nhân Phạm, Thế Văn Nguyễn, Hong Truong Luu. 2015. Billolivia tichii (Gesneriaceae), A New Species from Vietnam. Phytotaxa. 219(2): 190–194. DOI:  10.11646/phytotaxa.219.2.9

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