Lasianthus lacduongensis V. S. Dang & Naiki 2021
Creators
- 1. Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907 - 1541 Japan. & Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Vietnam. & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam. & dvsonitb @ gmail. com; https: // orcid. org / 0000 - 0001 - 8681 - 4141
- 2. Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907 - 1541 Japan. & Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Taketomi-cho, Yaeyama-gun, Okinawa, 907 - 1541 Japan. & naiki @ lab. u-ryukyu. ac. jp; https: // orcid. org / 0000 - 0002 - 3235 - 2823 * Author for correspondence
Description
40. Lasianthus lacduongensis V.S.Dang & Naiki (2021: 42) — Fig. 65 (plate), Fig. 62 (map)
Type: — VIETNAM. Lam Dong Province, Bidoup Nui Ba National Park, 1490 m elev., 19 February 2014, 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 (holotype VNM! [VNM00042910]; isotypes FU!, VNM! [VNM00042911, VNM00042912], the herbarium of Iriomote Station (Japan)).
Specimens examined: — VIETNAM. Central: 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, 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 (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, 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 (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, 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 (FU, VNM, the herbarium of Iriomote Station (Japan)).
Distribution: —Endemic to Vietnam (known from the Hon Ba Nature Reserve in Khanh Hoa Province and Bidoup Nui Ba National Park in Lam Dong Province).
Habitat & Ecology: —In evergreen forests at 1200–1600 m elev.
Phenology: —Flowering and fruiting from February to November.
Vernacular name: —Xú hưƠng lạc dưƠng.
Notes: — Lasianthus lacduongensis is similar to L. membranaceoideus 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.
Lasianthus lacduongensis was previously recognized by Dang et al. (2019) based on the specimen Dang 193 (VNM) as a new record of “ L. membranaceoideus H.Zhu ” for the flora of Vietnam. However, after careful examination of morphological and molecular evidence, it is L. lacduogensis V.S.Dang & Naiki.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- FU, VNM , VNM, FU
- Family
- Rubiaceae
- Genus
- Lasianthus
- Kingdom
- Plantae
- Material sample ID
- VNM00042910, VNM00042911, VNM00042912
- Order
- Gentianales
- Phylum
- Tracheophyta
- Scientific name authorship
- V. S. Dang & Naiki
- Species
- lacduongensis
- Taxon rank
- species
- Type status
- holotype
- Taxonomic concept label
- Lasianthus lacduongensis Dang, 2021 sec. Dang & Naiki, 2023
References
- Zhu, H., Roos, M. C. & 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