Lasianthus lacduongensis V. S. Dang &amp; Naiki 2021
Creators: name: Dang, Van-Son
name: Naiki, Akiyo
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Gentianales
Rubiaceae
Lasianthus
Lasianthus lacduongensis

description: <b>40.</b> <i>Lasianthus lacduongensis</i> V.S.Dang &amp; Naiki (2021: 42) — Fig. 65 (plate), Fig. 62 (map) <b>Type:</b> — VIETNAM. Lam Dong Province, Bidoup Nui Ba National Park, 1490 m elev., 19 February 2014, <i>Toyama H., Tagane S., Dang V.S., Nagamasu H., Naiki A., Tran H., Yang C.J. with Ngoc N.V., Cuong N.Q., Hieu H.N.P., Loi X.N. V1840</i> (holotype VNM! [VNM00042910]; isotypes FU!, VNM! [VNM00042911, VNM00042912], the herbarium of Iriomote Station (Japan)). <b>Specimens examined:</b> — VIETNAM. <b>Central:</b> Lam Dong Province, Bidoup Nui Ba National Park, 1490 m elev., 12°10’26.91’’N, 108°41’53.94’’E, in evergreen forests, 19 February 2014, <i>Toyama H., Tagane S., Dang V.S., Nagamasu H., Naiki A., Tran H., Yang C.J. with Ngoc N.V., Cuong N.Q., Hieu H.N.P., Loi X.N. V1840</i> (FU, VNM, the herbarium of Iriomote Station (Japan)); in the same location, 1490 m elev., 12°10’26.91’’N, 108°41’53.94’’E, in evergreen forests, 19 February 2014, <i>Toyama H., Tagane S., Dang V.S., Nagamasu H., Naiki A., Tran H., Yang C.J. with Ngoc N.V., Cuong N.Q., Hieu H.N.P., Loi X.N. V1930</i> (FU, VNM, the herbarium of Iriomote Station (Japan)). Khanh Hoa Province, Hon Ba Nature Reserve, 1533 m elev., 12°07’01.82’’N, 108°56’43.63’’E, in evergreen forests, 25 November 2014, <i>Toyama H., Tagane S., Dang V.S., Nagamasu H., Naiki A., Tran H., Yang C.J. with Cuong N.Q., Hieu H.N.P. V2160</i> (FU, VNM, the herbarium of Iriomote Station (Japan)). <b>Distribution:</b> —Endemic to Vietnam (known from the Hon Ba Nature Reserve in Khanh Hoa Province and Bidoup Nui Ba National Park in Lam Dong Province). <b>Habitat &amp; Ecology:</b> —In evergreen forests at 1200–1600 m elev. <b>Phenology:</b> —Flowering and fruiting from February to November. <b>Vernacular name:</b> —Xú hưƠng lạc dưƠng. <b>Notes:</b> — <i>Lasianthus lacduongensis</i> is similar to <i>L. membranaceoideus</i> H. Zhu (2012: 62) which is endemic to Borneo in having the shape of leaves and bracts inconspicuous, but differs from the latter in having sparsely tomentose on young branches (vs. glabrous), more secondary veins (8–10 on each side of midrib vs. 6–8 on each side of midrib), shorter petioles (5–7 mm long vs. 6–10 mm long), and fruits with 2 (vs. 4) pyrenes. <i>Lasianthus lacduongensis</i> was previously recognized by Dang <i>et al.</i> (2019) based on the specimen <i>Dang 193</i> (VNM) as a new record of “ <i>L. membranaceoideus</i> H.Zhu ” for the flora of Vietnam. However, after careful examination of morphological and molecular evidence, it is <i>L. lacduogensis</i> V.S.Dang &amp; Naiki.
description: Published as part of <i>Dang, Van-Son &amp; Naiki, Akiyo, 2023, A revision of the genus Lasianthus Jack (Rubiaceae) from Vietnam, pp. 1921-1935 in Phytotaxa 581 (1)</i> on pages 1921-1935, DOI: 10.11646/phytotaxa.581.1.1, http://zenodo.org/record/7571550
description: {"references": ["Zhu, H., Roos, M. C. &amp; Ridsdale, C. E. (2012) A taxonomic revision of the Malesian species of Lasianthus (Rubiaceae). Blumea 57: 1 - 102. https: // doi. org / 10.3767 / 000651912 X 652012"]}