Cinnadenia liyuyingii (H.Liu) de Kok & Sengun, 2020

De Kok, Rogier P. J. & Sengun, Seda, 2020, A revision of Cinnadenia Kosterm. (Lauraceae), Adansonia 42 (4), pp. 105-112 : 107-108

1. Cinnadenia liyuyingii (H.Liu) de Kok & Sengun , comb. nov.

Litsea liyuyingii H.Liu, Bulletin de la Société botanique de France 80: 566 (1933); C.K. Allen, Annals of the Missouri Botanic Gardens 25: 380 (1938); H.W.Li et al., Flora of China 7: 132 (2008).

— Type: China, Yunnan, Szemao, Henry 12839 (holo-, P [not seen]; iso-, K [2×], MO [MO-1889408; Fig. 2 ]).

Cinnadenia paniculata sensu P.H.Hộ, Illustrated Flora of Vietnam 1: 401 (1999).

DISTRIBUTION. — South China and Northern Vietnam.

ECOLOGY. — Growing in primary lowland evergreen broadleaved forest, sometimes over limestone, at 600-1375 m altitude. Flowering from October to March; fruiting in March.

CONSERVATION ASSESSMENT. — Endangered (EN B1ab(i,iii), B2ab(ii,iii)). This species is known only from a small number of collections from a few localities in Yunnan in Southern China and in the Northern part of Vietnam. An analysis of the Extent of Occurrence (EOO) gives a IUCN Conservation Assessment of Vulnerable, but the Area of Occupancy (AOO) suggests an assessment of Endangered. Given that it is known from less then five populations and has small area of occupancy as well as the intensive logging and landscape modification that has occurred in the region during the last 50 years, this species must be considered endangered.

ADDITIONAL COLLECTIONS SEEN. — Vietnam: Ninh Binh prov., Nho Quan Dist., Cuc Phuong Nat. Park, 12.III.2007, Nguyen et al. HNK 1432 (K[K000705428], P[P00806944]).

China. Yunnan, Szemao, Henry 12025 A ( K).

DESCRIPTION

Tree 3-10 m tall, DBH 10-12 cm. Twigs slender, 1.8-3 mm thick, rounded in cross-section, sparsely hairy to glabrous; terminal leaf bud ovoid, 6.4-7.4 mm long, apex acuminate, glabrous to velutinous. Leaves alternate; leaf blade elliptic or lanceolate, 8-25 × 2.2-8 cm, apex acute or obtuse, base cuneate, pinninerved, secondary nerves 7-12 pairs, tertiary nerves scalariform; upper surface glabrous, midrib and secondary veins raised, tertiary veins distinct and giving the upper surface a pitted appearance; lower surface glabrous, midrib and secondary veins raised, tertiary veins distinct, glaucous; petiole half-terete 15-20 mm, slender, glabrous. Inflorescences umbels on branchlets, 3-4 cm long, axillary, sparsely hairy, umbels with 4 or 5 flowers; hairs yellowish, erect to appressed; bracteoles unknown, caducous, 1-4 fruits per infructescence. Flower unisexual, white to yellow; male flowers perianth lobes 6, ovate 3.2-3.7 × 2-3 mm, apex acute, outside and inside glabrous; stamens 26 or 32, 1.8-2 mm long, sparsely hairy; female flower unknown. Fruit globose, 1.5-2.5 cm long, apex rounded, glabrous, smooth; cupule 4-5 mm diameter, sparsely hairy, margin entire; stalk sparsely hairy, slightly swollen, up to 1.6 mm thick.

Figures

FIG. 2. — Isotype of Cinnadenia liyuyingii (H.Liu) de Kok & Sengun, comb. nov. (MO-1889408).