Lasianthus sonlangensis V.S.Dang, Vuong & Quan (2022: 25)

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.7571888

persistent identifier

https://treatment.plazi.org/id/43284262-FFE4-FFA2-5AB6-F99B4080CD6D

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Plazi (2023-01-26 05:55:47, last updated 2023-11-08 12:54:13)

scientific name

Lasianthus sonlangensis V.S.Dang, Vuong & Quan (2022: 25)
status

 

64. Lasianthus sonlangensis V.S.Dang, Vuong & Quan (2022: 25) — Fig. 95 View FIGURE 95 (plate), Fig. 94 View FIGURE 94 (map)

Type: — VIETNAM. Gia Lai Province, K’Bang District, Son Lang Commune, Kon Chu Rang Nature Reserve , 900–1100 m elev., 22 April 2021, Van-Son Dang, Ba Vuong Truong, Minh Quan Dang & Nghia Son Hoang, Dang 465 (holotype VNM! [ VNM00042935 View Materials ]; isotypes HN!, VNM! [ VNM00042936 View Materials , VNM00042937 View Materials ]) .

Specimens examined: — VIETNAM. Central: Gia Lai Province, K’Bang District, Son Lang Commune, Kon Chu Rang Nature Reserve , 1080 m elev., 25 April 2021, Van-Son Dang, Ba Vuong Truong, Minh Quan Dang & Nghia Son Hoang, Dang 465a ( VNM) .

Distribution: —Endemic to Vietnam (currently known only from Kon Chu Rang Nature Reserve of Gia Lai Province).

Habitat & Ecology: — Lasianthus sonlangensis occurs in the understory of the primary evergreen forest at an elevation of 900–1100 m.

Phenology: —Flowering and fruiting from March to September.

Vernacular name: —Xú hưƠng sƠn lạng.

Notes: — Lasianthus sonlangensis was described from a Vietnamese specimen (Dang 465) by Dang et al. (2022). It is similar to L. caeruleus Pit. (1924: 390) in the shape of leaves and inflorescences, but differs from the latter in having more than secondary veins, shorter petioles, bracts present (vs. absent), larger calyx and corolla lobes 4 (vs. 5).

Dang, M. Q., Nguyen, M. H., Hoang, N. S., Le, V. T., Nguyen, T. M. H., Ho, N. Q. C., Truong, B. V. & Dang, V. S. (2022) Two new species of Lasianthus Jack (Rubiaceae) from southern Vietnam. European Journal of Taxonomy 806: 19 - 31. https: // doi. org / 10.5852 / ejt. 2022.806.1697

Gallery Image

FIGURE 94. Distribution maps of Lasianthus sikkimensis, L. sonlangensis, L. stephanocalycinus and L. tamdaoensis.

Gallery Image

FIGURE 95. Lasianthus sonlangensis V.S.Dang, Vuong & Quan (from Dang 465, VNM): A. Branche, B. Stipules, C. Adaxial and abaxial leaf surfaces, D–F. Close-up of infructescence, G–I. Close-up of flowers (photos by Truong Ba Vuong).

VNM

Institute of Tropical Biology

HN

National Center for Natural Sciences and Technology