Lasianthus tamdaoensis V.S. Dang (2020: 51)

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.7571890
persistent identifier	https://treatment.plazi.org/id/43284262-FF1F-FF5E-5AB6-FD164110C969
treatment provided by	Plazi
scientific name	Lasianthus tamdaoensis V.S. Dang (2020: 51)
status

Treatment

66. Lasianthus tamdaoensis V.S. Dang (2020: 51) View in CoL — Fig. 97 View FIGURE 97 (plate), Fig. 94 View FIGURE 94 (map)

Type: — VIETNAM. Vinh Phuc Province, Tam Dao National Park , 75 km north of Ha Noi City , 1124 m elev., 13 November 2018, Dang V.S. & Naiki A., Dang 242 (holotype VNM! [ VNM00042938 View Materials ]; isotypes HN!, KYO!, VNM! [ VNM00042939 View Materials ], VNMN!) .

Specimens examined: — VIETNAM. Northern: Vinh Phuc Province, Tam Dao National Park, 75 km north of Ha Noi City, 1124 m elev., 13 November 2018, Dang V.S. & Naiki A., Dang 243 ( VNM, the herbarium of Iriomote Station (Japan)); Ha Noi City, Ba Vi National Park , 50 km west of Ha Noi city center, 1267 m elev., 17 November 2018, Dang V.S. & Naiki A., Dang 271 ( VNM, the herbarium of Iriomote Station (Japan )) .

Distribution: —Endemic to Vietnam (currently known as Tam Dao National Park of Vinh Phuc Province and Ba Vi National Park of Ha Noi City).

Habitat & Ecology: —Growing under the shade of evergreen forest or the edge of the evergreen montane forest at 1000–1300 m elev.

Phenology: —Flowering and fruiting from June to December.

Vernacular name: —Xú hưƠng tam đảo.

Notes: — Lasianthus tamdaoensis was described as new from a Vietnamese specimen (Dang 242) by Dang & Naiki (2020). This species is easily identified in the field in having densely appressed pubescent to strigose on branches, ovate to ovate-oblong leaves, secondary veins 5–6 on each side of midrib, flowers white, and fruits ovoid or globose, blue when ripe.