Lasianthus honbaensis V.S.Dang, Tagane

Dang, Van-Son & Naiki, Akiyo, 2023, A revision of the genus Lasianthus Jack (Rubiaceae) from Vietnam, Phytotaxa 581 (1), pp. 1921-1935 : 1921-1935

publication ID	https://doi.org/10.11646/phytotaxa.581.1.1
DOI	https://doi.org/10.5281/zenodo.7571714
persistent identifier	https://treatment.plazi.org/id/43284262-FFD7-FF96-5AB6-FAC342C4C464
treatment provided by	Plazi (2023-01-26 05:55:47, last updated 2023-11-08 12:54:13)
scientific name	Lasianthus honbaensis V.S.Dang, Tagane
status

Treatment

31. Lasianthus honbaensis V.S.Dang, Tagane View in CoL & H. Toyama (2015: 263)— Fig. 54 View FIGURE 54 (plate), Fig. 52 View FIGURE 52 (map)

Type: — VIETNAM. Khanh Hoa Province, Hon Ba Nature Reserve, 30 km west of Nha Trang City , 1498 m elev., 18 July 2013, Tagane S., Yahara T .. Nagamasu H., Fuse K., Toyama H., Tran H., Son V.D. with Loi X.N., Thach N.D., Cuong Q.N., Hieu P.N.H., Thach K.N. V 275 (holotype VNM! [ VNM00042895 View Materials ]; isotypes FU!, KYO!, VNM! [ VNM00042896 View Materials , VNM00042897 View Materials ]) .

Specimens examined: — VIETNAM. Central: Khanh Hoa Province, Hon Ba Nature Reserve, 30 km west of Nha Trang City, 1498 m elev., 18 July 2013, Tagane S., Yahara T.. Nagamasu H., Fuse K., Toyama H., Tran H., Son V.D. with Loi X.N., Thach N.D., Cuong Q.N., Hieu P.N.H., Thach K.N. V275a ( VNM); in the same location, 1524 m elev., 28 November 2017, Dang V.S. & Naiki A. N10118 View Materials ( VNM); in the same location, 1500 m elev., 23 July 2018, Dang V.S. & Hoang N.T.B.N., Dang 191 ( VNM, the herbarium of Iriomote Station (Japan)); Lam Dong Province, Bidoup Nui Ba National Park, 50 km northeast of Dalat City, 1490 m elev., 19 November 2014, Toyama H., Tagane S., Dang V.S., Nagamasu H., Naiki A., Tran H., Yang C.J. V1924 ( FU, VNM).

Distribution: —Endemic to Vietnam (currently known as Hon Ba Nature Reserve of Khanh Hoa Province and Bidoup Nui Ba National Park of Lam Dong Province).

Habitat & Ecology: —Growing under secondary and primary montane forests at 1200–1600 m elev.

Phenology: —Flowering and fruiting from July to December.

Vernacular name: —Xú hưƠng hòn bà.

Notes: — Lasianthus honbaensis was described as new from a Vietnamese specimen by Dang et al. (2015). It is characterized in having densely appressed pubescent branches, leaf blade coriaceous, secondary veins 6–7 on each side of midrib, flowers white, and fruits orange when ripe.

References

Dang, V. S., Tagane, S., Toyama, H. & Tran, H. (2015) Lasianthus yaharae (Rubiaceae), a new species from Hon Ba Nature Reserve, southern Vietnam. Annales Botanici Fennici 52: 352 - 354. https: // doi. org / 10.5735 / 085.052.0513

Figures

FIGURE 52. Distribution maps of Lasianthus hirsutus, L. hispidulus, L. honbaensis and L. hongiaoensis.

FIGURE 54. Lasianthus honbaensis V.S.Dang, Tagane & H.Toyama (from Dang 191, VNM and the herbarium of Iriomote Station (Japan)): A. Branch with flowers, B. Stipules, C. Abaxial leaf surfaces, D–E. Inflorescence showing side view buds and flower, G. Young fruits, H. Mature fruit, I. Cross section of fruit.