Ardisia (Bladhia) scalarinervis E. Walker

Hai, Do Van, Thien, Tran Duc, Quang, Bui Hong, Cuong, Nguyen The & Hao, Gang, 2025, Novelties in the genus Ardisia (Primulaceae) from Vietnam: a new species and two new records, PhytoKeys 260, pp. 51-62 : 51-62

Ardisia (Bladhia) scalarinervis E. Walker , J. Washington Acad. Sci. 21: 477 (1931).

Fig. 4

Type.

China • Yunnan Province: Szemao , 4500 feet alt., A. Henry 12021 (holotype: US! [ US 00116206 ]; isotypes: A! [ A 00025264 ], K! [ K 000756647 ]) .

Specimens examined in Vietnam.

Dien Bien Province, Muong Nhe District, Sin Thau Commune , in evergreen forest: 770 m alt., 22°23'59.2"N, 102°14'12.4"E, 12 April 2022, Do Van Hai et al. CSCL 88 [fr.] ( HN) ; Lai Chau Province, Muong Te District, Mu Ca Commune , in evergreen forest: 621 m alt., 22°29'45.7"N, 102°26'01.1"E, 8 April 2022, Do Van Hai et al. ĐTCS 98 [fr.] ( HN) ; ibid., 22 March 2025, Do Van Hai et al. ĐLTB 592 [fr.] ( HN) .

Distribution.

China (Yunnan) and Vietnam (Dien Bien, Lai Chau).

Ecology in Vietnam.

In the field survey, only two populations were found at an altitude of 621 m and 770 m, respectively; in evergreen forest, moist places.

Phenology.

Fruiting from February to April in China ( Chen and Pipoly 1996). Fruiting from March to April in Vietnam.

Preliminary conservation status.

Ardisia scalarinervis was previously known as an endemic species to China and distributed in Yunnan. Although only two populations were collected in Muong Te and Muong Nhe districts in Vietnam, more individuals are expected to occur there and the habitat is currently well-protected from anthropogenic activities under the law. Thus, it is appropriate to place this species under the category Least Concern (LC) following IUCN Red List (IUCN 2024).

Figures

Figure 4. Ardisia scalarinervis E. Walker. A. Habit; B. Stem and petiole; C. Branch with leaves on the abaxial view and fruits; D. Leaf blade margin, abaxial view; E, F. Fruits. Photos by D. V. Hai.