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墨脱柱兰 Cylindrolobus motuoensis X.H.Jin & J.D.Ya. 中缅柱兰 C. glabriflorus X.H.Jin & J.D.Ya |
Abstract
Two new species, Cylindrolobus motuoensis and C. glabriflorus (Orchidaceae), from Southwestern China and north of Myanmar are described and illustrated with detailed photos. Cylindrolobus motuoensis is morphologically similar to C. gloensis and C. foetidus, but can be distinguished from them by having amplexicaul sterile bracts, dark red floral bracts, white flowers, falcate-lanceolate lateral sepals and central keel of lip running from base to the tip of mid-lobe. Cylindrolobus glabriflorus is similar to C. hegdei and C. tenuicaulis but differs from them by having longer and wider leaves, obovate bracts, and the reddish brown central papillate keel of lip.
Keywords: Taxonomy, Orchidaceae, Cylindrolobus, new species, China
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| Cylindrolobus motuoensis X.H.Jin & J.D.Ya. A Plant B Inflorescence C lateral view of flower D ventral view of flower E front view of flower F adaxial sepals and petals G abaxial sepals and petals H lateral view of column and lip I lateral view of column J front view of column K front view of labellum L lateral view of labellum (rip cutting) M adaxial bract N abaxial bract O polar view of pollinarium P ventral view of pollinarium Q lateral view of pollinarium R adaxial anther cap S abaxial anther cap (Photographed by J.-D. Ya). |
Cylindrolobus motuoensis X.H.Jin & J.D.Ya, sp. nov.
Diagnosis: Cylindrolobus motuoensis is similar to C. gloensis (Ormerod & Agrawala) Schuit., Y.P. Ng & H.A. Pedersen, and C. foetidus (Aver.) Schuit., Y.P. Ng & H.A. Pedersen in terms of morphological structure and shape of the flowers (Hu et al. 2010, Agrawala and Ormerod 2014, Ng et al. 2018). The new species can be distinguished from C. gloensis by the smaller flowers, elliptic and concave bracts, and ovate lip with three keels, mid-lobe thickened and papillate on margin. The new species can be distinguished from C. foetidus with longer and wider leaves, dark red and elliptic floral bracts, white flowers and falcate-lanceolate lateral sepals.
Etymology: The new species is named after Motuo, Xizang Autonomous Region of China, where it was discovered in a subtropical evergreen broad-leaved forest.
Vernacular name: Mo Tuo Zhu Lan (墨脱柱兰).
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| Cylindrolobus glabriflorus X.H.Jin & J.D.Ya. A Plant B inflorescence C ventral view of flower D lateral view of flower E adaxial sepals and petals F abaxial sepals and petals G lateral view of column and lip H front view of labellum I lateral view of labellum J ventral view of labellum K lateral view of column L front view of column M adaxial bract N abaxial bract O lateral view of pollinarium P polar view of pollinarium Q abaxial anther cap R adaxial anther cap (Photographed by J.D. Ya). |
Cylindrolobus glabriflorus X.H.Jin & J.D.Ya, sp. nov.
Diagnosis: Cylindrolobus glabriflorus is similar to C. hegdei (Agrawala & H. J. Chowdhery) A. N. Rao and C. tenuicaulis (S. C. Chen & Z. H. Tsi) S. C. Chen & J. J. Wood (Agrawala and Chowdhery 2008, Chen et al. 2009). The new species can be distinguished from C. hegdei by the longer and wider leaves, glabrous inflorescence, smaller and yellow flowers, yellowish green and obovate bracts and reddish brown central papillate keel of lip. It differs from C. tenuicaulis by having longer and wider leaves, longer inflorescence, yellowish green and obovate bracts, longer lip with three calli, lateral margins of mid-lobe thickened and erect.
Etymology: The specific epithet “glabriflorus” refers to glabrous flowers of this new species.
Vernacular name: Zhong Mian Zhu Lan (中缅柱兰).
Ji-Dong Ya, Xiao-Hua Jin and Cheng Liu. 2019. Two New Species of Cylindrolobus (Orchidaceae) from the eastern Himalayas. In: Cai J, Yu W-B, Zhang T, Li D-Z (Eds) Revealing of the plant diversity in China’s biodiversity hotspots. PhytoKeys. 130: 107-113. DOI: 10.3897/phytokeys.130.33989
