Quercus donnaiensis A.Camus, 1935

Binh, Hoang Thi, Ngoc, Nguyen Van, Tagane, Shuichiro, Toyama, Hironori, Mase, Keiko, Mitsuyuki, Chika, Strijk, Joeri Sergej, Suyama, Yoshihisa & Yahara, Tetsukazu, 2018, A taxonomic study of Quercus langbianensis complex based on morphology and DNA barcodes of classic and next generation sequences, PhytoKeys 95, pp. 37-70 : 58

Quercus donnaiensis A.Camus Fig. 11

Quercus donnaiensis A.Camus, Chênes Atlas 2: 119, pl. 227 (1935-1936), nom. nud.; Les Chênes 1: 190 (1935).

Type.

VIETNAM. "Annam: Pres de Sapoum , près station agricole de Blao, prov. du Haut Donai", 1000-1100 m, 9 Jan. 1935, E. Poilanei 23732 (lectotype: P [P00753995!]; isolectotype: P [P00753994!], designated here) .

Distribution and habitat.

VIETNAM. Lam Dong Province: Lan Tranh wards. In this study, Q. donnaiensis was found in lower montane evergreen forest, beside a stream at 1489 m altitude and at the edge of evergreen forest, at 1695 m altitude.

Additional specimens examined.

VIETNAM. Lam Dong Province, Lan Tranh wards, 12°04'08.5"N, 108°21'55.5"E, alt. 1,695 m, 18 June 2015, N. Nguyen, D. Luong, B. Hoang V3208 (DLU, FU) ; Lam Dong Province, Bi Doup-Nui Ba National Park, 12°11'19.8"N, 108°40'48.3"E, alt. 1,489 m, 25 Feb. 2016, Tagane S., Wai J. V 4398 (FU, DLU, the herbarium of Bidoup-Nui Ba National Park ) .

Note.

Quercus donnaiensis was described by Camus (1935), based on the specimen Poilanei 23732 collected from Vietnam and then illustrated by Camus (1935 - 1936). Two specimens of Poilanei 23732 deposited in P have acorns and are consistent with the illustration and description of Camus (1935 a, b). Amongst them, the specimen Poilane 23732 in P [P00753995] with nuts, as it better represents the diagnostic traits, was designated as the lectotype of Q. donnaiensis .

Figures

Figure 11. Quercus donnaiensis A. Camus. A Leafy twig B Infructescence, young fruits and abaxial side of mature leaf C Dried specimen. Materials: A, B from Tagane S., Wai J. V 4398 C from Ngoc et al. V 3208.