Friday, July 1, 2016

[Botany • 2016] Bulbophyllum pingnanense • A New Species (Orchidaceae, Epidendroideae, Dendrobiinae) from Fujian, China

Bulbophyllum pingnanense 
J.F. Liu, S.R. Lan & Y.C. Liang

A new orchid species, Bulbophyllum pingnanense, is described and illustrated from Fujian, China. It is similar to B. brevipedunculatum and B. albociliatum in vegetative and floral morphology, but it can be distinguished from Bbrevipedunculatum by having a longer dorsal sepal with longer white ciliate on margin, longer and lanceolate lateral sepals, and a glabrous lip. It can be distinguished from B. albociliatum by having a shorter inflorescence, and a longer dorsal sepal.

Keywords: Bulbophyllum, Eastern China, Fujian, Orchidaceae


Bulbophyllum pingnanense J.F. Liu, S.R. Lan & Y.C. Liang, sp. nov. 

Type: China. Fujian: Pingnan County, Shuangxi Town, on rock along Yuanyan River, 800–900 m, 27°01'N, 119°05'E, 23 June 2013, J.F. Liu 201312 (holotype: FAFU!; isotype: NOCC!).

Bulbophyllum pingnanense is similar to B. brevipedunculatum T.C. Hsu & S.W. Chung and B. albociliatum (T.S. Liu & H.Y. Su) K. Nackejima. It differs from Bbrevipedunculatum by having a longer dorsal sepal with either an obtuse or an acute apex and longer white ciliate on margins; longer and lanceolate lateral sepals; and glabrous lip. It can be distinguished from B. albociliatum by its shorter inflorescence, a longer dorsal sepal with either an obtuse or an acute apex.

Figure 2. Bulbophyllum pingnanense J.F. Liu, S.R. Lan & Y.C. Liang.
A habitat and habit B–D flower E dorsal sepal F lateral sepal G petal H lip I lip, column, pedicel and ovary, side view J pollinia and anther cap. 

Etymology: The species epithet refers to Pingnan County where this new species was found.

 Distribution and habitat Bulbophyllum pingnanense is so far only known within Pingnan, Fujian, China (Fig. 3). It is epiphytic on steep rock in the edge of evergreen coniferous and broad-leaved mixed forest, which is mainly composed of Castanopsis eyrei (Champ. ex Benth.) Hutch. (Fagaceae), Cunninghamia lanceolata (Lamb.) Hook. (Taxodiaceae). Other orchids, Amitostigma gracile (Bl.) Schltr., Pholidota cantonensis Rolfe, Cymbidium floribundum Lindl. and Pleione formosana Hayata, were found growing nearby this new species.

Phenology: Flowering from June to July.

Conservation status: Bulbophyllum pingnanense is known only from the type locality, and only one population of ca. 3000 individual plants was discovered in a small area of ca. 0.002 km2 during two years of botanical surveys. Based on the extent of occurrence estimated to be less than 100 km2 (CR B1) and the area of occupancy less than 10 km2 (CR B2), species existing at a single location (CR B1a + B2a), B. pingnanense is assigned a preliminary status of Critically Endangered (CR B1a + B2a) according to the IUCN Categories and Criteria (IUCN 2012). In addition, the plants of Bulbophyllum are used as herbal medicine in the locality. It is possible that B. pingnanense might also be collected for using as herbal medicine. Therefore, immediate conservation strategy should be taken.

 Jiangfeng Liu, Si-Ren Lan, Bi-Zhu He and Yi-Chi Liang. 2016. Bulbophyllum pingnanense (Orchidaceae, Epidendroideae, Dendrobiinae), A New Species from Fujian, China. PhytoKeys. 65: 107-112. DOI:  10.3897/phytokeys.65.8254