Ceriscoides glabra (Gardenieae: Rubiaceae), a new species from Kon Chu Rang Nature Reserve, southern Vietnam

TRAN DUC BINH; BUI HONG QUANG; NGUYEN THE CUONG; HA QUY QUYNH; DUONG THI HOAN; DO VAN HAI; KHANG SINH NGUYEN; MAXIM S. NURALIEV

doi:10.11646/phytotaxa.574.2.4

Issue: Vol. 574 No. 2: 29 November 2022

Type: Article

Published: 2022-11-29

DOI: 10.11646/phytotaxa.574.2.4

Page range: 158-164

Abstract views: 49

PDF downloaded: 2

Ceriscoides glabra (Gardenieae: Rubiaceae), a new species from Kon Chu Rang Nature Reserve, southern Vietnam

TRAN DUC BINH⁺⁻
BUI HONG QUANG⁺⁻
NGUYEN THE CUONG⁺⁻
HA QUY QUYNH⁺⁻
DUONG THI HOAN⁺⁻
DO VAN HAI⁺⁻
KHANG SINH NGUYEN⁺⁻
MAXIM S. NURALIEV⁺⁻

Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, 10000 Hanoi, Vietnam. Department of Botany, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, 10000 Hanoi, Vietnam.

Department of Botany, Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, 10000 Hanoi, Vietnam.

Joint Russian-Vietnamese Tropical Scientific and Technological Center, Nguyen Van Huyen str., Cau Giay, Hanoi, Vietnam. Department of Higher Plants, Biological Faculty, M.V. Lomonosov Moscow State University, 1, 12, Leninskie Gory, 119234 Moscow, Russia.

brachyblasts Eastern Indochina floral dimorphism Gia Lai Province plant diversity plant taxonomy thorns Eudicots

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Abstract

Ceriscoides glabra, a new species of the tribe Gardenieae (Rubiaceae), is described and illustrated. The species was discovered in 2017–2018 in Kon Chu Rang Nature Reserve (Gia Lai Province, southern Vietnam), in the vicinity of the locally well-known K50 waterfall, also known as Hang En waterfall. The new species differs from its congeners by the following features: plant entirely glabrous, leaf blade mostly less than 6.5 cm long and less than 4 cm wide, with 3–4 pairs of secondary veins and without domatia, calyx in female flowers glabrous with lobes more than 9 mm long, and corolla lobes in female flowers more than 10 mm long and distinctly longer than wide.

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