Sunday, May 20, 2018

[Botany • 2018] Coelogyne victoria-reginae (Orchidaceae, Epidendroideae, Arethuseae) • A New Species from Chin State, Myanmar

Coelogyne victoria-reginae Q.Liu & S.S.Zhou

in Zhou, Tan, Jin, et al., 2018.

Coelogyne victoria-reginae, a new species of section Proliferae, from Natma Taung (Mt.Victoria) National Park, Chin State, Myanmar, is described and illustrated. It is morphologically similar to C. prolifera, but the clustered pseudobulbs, pure brownish- red flowers and column wing with irregular notches at the apex of the new species differ from the other species. A preliminary risk-of-extinction assessment shows that the new species is regarded as EN C2a[i] according to the IUCN Red List Categories and Criteria.

Keywords: NatmaTaung (Mt. Victoria) National Park, risk of extinction assessment, section Proliferae, taxonomy

Figure 2. Coelogyne victoria-reginae.
A Habitat B Plant C Inflorescence D Flower E Lateral view of labellum F Front view of labellum G Front and lateral view of column H Abaxial and adaxial anther cap. I. Pollinarium
 (Photographed by Q. Liu) 

Figure 1. Coelogyne victoria-reginae.
A Plant B Inflorescence C Lateral view of labellum D Pollinarium E Abaxial and adaxial anther cap F Sepals and petals G Front view of flower H Front and lateral view of column.
All from the type collection (Qiang Liu, M17-18) and drawn by Lan Yan. 

Figure 3. A Coelogyne schultesii (A-1 Plant A-2 Inflorescence A-3 Flower)
Coelogyne ecarinata (B-1 Plant B-2 Inflorescence B-3 Flower)
Coelogyne victoria-reginae (C-1 Plant C-2 Inflorescence C-3 Flower)
(Photographed by Q. Liu).

Coelogyne victoria-reginae Q.Liu & S.S.Zhou, sp. nov.

Diagnosis: Coelogyne victoria-reginae is closely related to C. prolifera by having the elliptic mid-lobe with two lamellae terminating at 2/3 on to mid-lobe, ovate or oblong lateral lobes. However, the new species can be distinguished from the latter by the ovoid pseudobulb and 1.1–1.4 cm apart on rhizome, flower brownish-red, lateral sepals (10–11 ×5.5–6.0 mm) significantly larger than dorsal sepal (7.0–8.0 × 4.5–5.0 mm).

Etymology: The new species is named after Victoria Mountain region, NatmaTaung National Park, Chin State, South-western Myanmar, where it was discovered in a vast area of mountain forest.

Distribution and habitat: Coelogyne victoria-reginae is only known from the type locality. It grows as an epiphyte on tree trunks in subtropical evergreen broad-leaved forest, which is dominated by Lithocarpus xylocarpus (Kurz) Markg. (Fagaceae).

 Shi-Shun Zhou, Yun-Hong Tan, Xiao-Hua Jin, Kyaw Win Maung, Myint Zyaw, Ren Li, Rui-Chang Quan and Qiang Liu. 2018. Coelogyne victoria-reginae (Orchidaceae, Epidendroideae, Arethuseae), A New Species from Chin State, Myanmar.   PhytoKeys. 98: 125-133.  DOI: 10.3897/phytokeys.98.23298


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