The Lauraceae Juss. of Indo-China: fifteen new species, four new combinations and two neotypifications De Kok, Rogier P. J. Adansonia 2023 3 2023-01-09 45 1 1 25 de Kok de Kok 2023 [964,1240,694,721] Magnoliopsida Lauraceae Litsea Plantae Laurales 14 13 Tracheophyta species honbaensis sp. nov.  DIAGNOSIS. — This species differs from its close relative  Litsea helferiHook. f.by having a glabrous petiole which is slightly swollen (while  L helferihas a sparsely hairy slender petiole); fruits which are 14- 16 × 7-8 mmon a cupule about 5.4 mmdiameter (while  L. helferihas fruits 28-32 × 18-24 mmand a cupule 6.5-6.9 mmdiameter).    TYPESPECIMEN. —  Vietnam, Khanh Hoa: 12 kmto Hon Ba, 12°6’56.016”N, 108°58’40.008”E, 24.VI.2004, Soejarto 13305(holo-, P[P01052426]).  DISTRIBUTION. — Vietnam( Fig. 7).  ECOLOGY. — Growing in forests over granite between 800-900 maltitude. Flowering from January to May; fruiting in February.  CONSERVATION ASSESSMENT. — Endangered (EN B1ab(i,iii), B2ab(ii,iii)). This species is only known from eight collections representing five localities in Vietnam(plus one locality that could not be found). An analysis of the Extent of Occurrence (EOO) and Area of Occupancy (AOO) gives an IUCN Conservation Assessment of Endangered.   ADDITIONAL COLLECTIONS SEEN. —  Vietnam. Nghe-An ( Vinh): Huyên de Nghia-Dam, 11°51’3.6”N, 108°36’25.2”E,  18.V.1941,  Poilane30571( P[ P06856488]). —  Lào Cai: Chapaet Cho-Bo, Chapa, 22°20’3.984”N, 103°50’51”E,  VII.1930,  Pételot5365( P[ P02003173, P02003180]);  Chapaet Cho-Bo,  800 m, 6.IX.1926,20° 49’0.012”N, 105°12’E,  Poilane13165( P[ P01976054, P01155417]). —  Thua Thien-Hue: Nui Back Ma station,près de Huế, 16°10’0.984”N, 107°49’58.008”E,  24.IV.1939,  Poilane29982( P01976319). —  Lâm Đồng: Blao, 11°28’40.8”N, 107°44’16.8”E,  28.VI.1933,  Poilane22776( P02011236). —  Tuyên Quang, Tonkin, Nguyen Luang, 21°46’36.228”N, 105°13’40.872”E,  VI.1925,  Pételot1931( P02011174).  DESCRIPTION Tree 8-10 mtall; dbh c. 20 cm. Twigs slender, 1-1.6 mmthick, rounded in cross-section, densely hairy when young, glabrescent; hairs yellowish, appressed; terminal leaf bud lanceolate, c. 2.5 mmlong, apex acute, velutinous. Leaves alternate; blade elliptic to lanceolate, 3.3-6.5 × 1-3 cm, apex acuminate, base cuneate, membranous, secondary nerves 4-5 pairs, curving near margin, tertiary nerves reticulate; upper surface glabrous, midrib and secondary nerves sunken, tertiary nerves indistinct; lower surface glaucous, glabrous, midrib and secondary nerves raised, tertiary nerves distinct; petiole half-terete, 8-14 mmlong, glabrous, slightly swollen.  FIG. 9. — Plate of  Litsea honbaensisde Kok, sp. nov.: A, twig with leaves, inflorescence and infructescence; B, infructescence with fruit; C, detail of leaf under surface. All from Poilane 13165(P01155417). Drawing by Giulia Iaconelli. Scale bars: A, 5 cm; B, 1.5 cm; C, 0.5 cm. Inflorescences in axils of leaves, 7.5-10 mmlong, in clusters of umbels, densely hairy. Flowers white; male flowers: perianth lobes linear, 1-1.4 × 0.5-0.6 mm, apex rounded, inside glabrous, outside velutinous; stamens 1-1.5 mmlong; female flowers: perianth lobes linear, 1-1.5 × 0.5-0.6 mm, apex rounded, inside glabrous, outside velutinous; ovary c. 0.9 mmdiameter, glabrous. Fruits 1-3 per infructescence, ellipsoid, 14-16 × 7-8 mm, apex acute, smooth, glabrous; cupule shallow, c.5.4 × 2.3 mm, margin entire, patent, smooth, sparsely hairy; stalk swollen up to 1.9 mmthick, slightly hairy (see Fig. 9). 4012835360 2004-06-24 P Vietnam Khanh Hoa 12.6 -108.58 14 13 P01052426 1 holotype 4012835340 1941-05-18 P Vinh & Poilane Vietnam 11.851001 Huyen de Nghia-Dam 1 108.607 14 13 P06856488 1 4012835327 1930-07 P Petelot Vietnam 22.33444 Chapa 14 103.8475 Chapa 14 13 P02003173, P02003180 1 Lao Cai 4012835304 P Poilane Vietnam 800 49.0 Chapa 105.2 14 13 P01976054, P01155417 1 Lao Cai 4012835303 1939-04-24 P de Hu & Poilane Vietnam 16.166939 Nui Back Ma station 1 107.83278 14 13 P01976319 1 Thua Thien-Hue 4012835310 1933-06-28 P Lam D & Poilane Vietnam 11.478 Blao 1 107.738 14 13 P02011236 1 Thua Thien-Hue 4012835311 1925-06 P Petelot Vietnam 21.77673 Nguyen Luang 1 105.22802 Tonkin 14 13 P02011174 1 Tuyen Quang