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Issue: Vol. 691 No. 1: 3 Mar. 2025
Type: Article
Published: 2025-03-03
DOI: 10.11646/phytotaxa.691.1.4
Page range: 49-62
Abstract views: 143
PDF downloaded: 11

Reinstatement of Bulbophyllum quadrangulum (Orchidaceae) from B. chondriophorum with morphological and molecular evidence

CAS Key Laboratory of Plant Germplasm and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China. Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China. University of Chinese Academy of Sciences, Beijing 100049, China.
Wolong National Natural Reserve Administration Bureau, Wenchuan 623003, China
CAS Key Laboratory of Plant Germplasm and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China. Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China. University of Chinese Academy of Sciences, Beijing 100049, China.
CAS Key Laboratory of Plant Germplasm and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China. Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China. University of Chinese Academy of Sciences, Beijing 100049, China. Herbarium of Wuhan Botanical Garden, Chinese Academy of Sciences (HIB), Wuhan 430074, China. Hubei Jiangxia Laboratory, Wuhan 430200, China. Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization/ National Orchid Conservation Center of China/ Orchid Conservation & Research Center of Shenzhen, Shenzhen 518114, Guangdong, China.
Bulbophyllum quadrangulum Taxonomy Phylogeny China Monocots

Abstract

The orchid species Bulbophyllum quadrangulum (Orchidaceae) was previously considered synonymous with B. chondriophorum. However, a thorough examination of the protologues and type specimens has revealed that B. quadrangulum is, in fact, distinct from B. chondriophorum. Its elongated, narrowly lanceolate lateral sepals (1.9–2.5 cm), with a caudate-acuminate apex, are quite different from the shorter, obliquely ovate and acute lateral sepals (7–8 mm) of B. chondriophorum. The two species do not overlap geographically and differ in flowering period and altitudinal range. Phylogenetic analyses based on plastid genome sequences also strongly support the independence of the two species. Consequently, this study reinstates the species status of B. quadrangulum and presents an updated morphological description, phenology, and distribution based on comprehensive information. Furthermore, the study also provides a distribution map, color photographs, detailed floral dissection, and habitat information.

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How to Cite

Jiang, H., Cheng, Y.-H., Belay, J.Z. & Hu, G.-W. (2025) Reinstatement of Bulbophyllum quadrangulum (Orchidaceae) from B. chondriophorum with morphological and molecular evidence. Phytotaxa 691 (1): 49–62. https://doi.org/10.11646/phytotaxa.691.1.4