Cinnamomum damhaense, Kosterm. ex de Kok, 2023

De Kok, Rogier P. J., 2023, The Lauraceae Juss. of Indo-China: fifteen new species, four new combinations and two neotypifications, Adansonia (3) 45 (1), pp. 1-25 : 8

5. Cinnamomum damhaense Kosterm. ex de Kok, sp. nov.

( Figs 2 ; 5 )

Cinnamomum damhaense Kosterm. , unpublished; P.H. Hô, Illustrated Flora of Vietnam: 433 ( Hô 1991), nom. inval.; Nguyén Kim Đào, Lauraceae in Checklist of Plant Species of Vietnam 2: 76 (Nguyén Kim Đào 2003), nom. inval.; Nguyén Kim Đào, Flora of Vietnam 20: 289 (Nguyén Kim Đào 2017), nom. inval.

DIAGNOSIS. — This species differs from its close relative Cinnamomum bokorense Tagane & Yahara by having elliptic leaves (vs elliptic to lanceolate leaves in C. bokorense ), and by having perianth lobes that are very sparsely hairy outside (vs densely hairy in C. bokorense ).

TYPE SPECIMEN. — [ Vietnam] Đà Nẵng, Ba-na, près de Tourane , 15°59’51.864”N, 107°59’17.088”E, alt. 1000-1500 m, 28.II.1939, Poilane 29158 (holo-, P [P02132189]; iso-, P [P00790091]).

DISTRIBUTION. — Vietnam and Cambodia ( Fig. 2 ).

ECOLOGY. — Growing on granite-derived soil between 1000-1500 m altitude. Flowering in February to March; fruiting in April.

CONSERVATION ASSESSMENT. — Endangered (EN B1ab(i,iii), B2ab(ii,iii)). This species is known from only four localities in Cambodia and Vietnam. An analysis of the Extent of Occurrence (EOO) and Area of Occupancy (AOO) gives an IUCN Conservation Assessment of Endangered.

ADDITIONAL COLLECTIONS SEEN. — Vietnam. Hanoi: FuChap, 21°4’3.936”N, 105°19’13.836”E, IV.1887, Balansa 2440 ( P [ P01748443 , P01748448 , P01964557 ]) ; Tonkin, Lung Wau Village, Sai Wong Mo Shan ( Sai Vong Mo Leng ), 18.V-5.VI.1940, Tsang 29873 ( E, K, P [ P00790092 ]).

Cambodia. Mt Cherew, 11°57’37.08”N, 104°12’27.9”E, IV.1870, Pierre 5168 ( P [ P 01748449, P 01964569, P 01964570, P 01964571, P 01964572, P 01978529, P 01978530]).

DESCRIPTION

Tree 6-10 m tall.Twigs slender, 2.4-3.5 mm thick, rounded in cross-section, glabrous; terminal leaf bud ovoid, 2.2-3.3 mm, apex acute, sparsely hairy. Leaves opposite, domatia absent; blade elliptic, 8-15 × 3-6.6 cm, apex acute, base cuneate and sometimes asymmetric, stiff leathery, trinerved, secondary nerves one pair, tertiary nerves scalariform; upper surface glabrous, midrib and secondary nerves raised, tertiary nerves indistinct; lower surface glabrous, midrib and secondary nerves raised, tertiary nerves indistinct; petiole half-terete, 7-18 mm long, slightly swollen, glabrous.

Inflorescence 10-15 cm long, a many flowered panicle, axillary, glabrous; bracts absent; bracteoles unknown. Flower light green, scented; perianth tube shallow, perianth lobes 2.2-4 × 1.7-1.8 mm, apex acute, very sparsely hairy; stamens 9, 1.5-2.7 mm long, hairy, anthers 4-celled; ovary ellipsoid, c. 1.2 mm long, glabrous, style c. 1.3 mm long, stigma capitate.

Fruit ellipsoid, 12-14.5 × 8-10 mm, apex rounded, smooth, glabrous; cupule woody, 5.4-6 mm diameter, margin entire; stalk slender, c. 1.5 mm thick (see Fig. 5 ).

NOTES

No evidence that this name was ever validly published could be found, so it is therefore validated here.

Figures

FIG. 2. — Distribution of Actinodaphne kontumi de Kok,sp. nov. (), Cinnamomum auricolor Kosterm. ex de Kok, sp. nov. (), Cinnamomum inconspicuum Kosterm.ex de Kok,sp.nov.(),Cinnamomum kostermannii de Kok,sp.nov.() and Cinnamomum damhaense Kosterm. ex de Kok, sp. nov. ().

FIG. 5. — Holotype of Cinnamomum damhaense Kosterm. ex de Kok, sp. nov., held at the Muséum national d’Histoire naturelle in Paris (P02132189).