De-Ping Ye’s scientific contributions

Eight new species from China, Cheirostylis chuxiongensis, C. yei, Myrmechis lingulata, M. longii, Bulbophyllum ximaense, B. xizangense, B. retusum and B. pulcherissimum, are described and illustrated. In addition, three species (Bulbophyllum frostii, B. raskotiil and B. nematocaulon) are reported for the first time in China.

Five new species (Gastrochilus yei, Gastrochilus minimus, Luisia simaoensis, Taeniophyllum xizangense, Tuberolabium subulatum) and two newly recorded species (Cleisostoma tricornutum, Luisia inconspicua) of Vandeae (Orchidaceae) from China are described and illustrated. Gastrochilus yei is similar to G. affinis and G. nepalensis, but differs from them by having an epichile not lobed, the apex of the hypochile not bilobed, and a tine on the apex of the leaf. Gastrochilus minimus is similar to G. acinacifolius, but can be distinguished from the latter by having a flabellate epichile that is densely hirsute on the adaxial surface and an inconspicuous central cushion; in addition, the hypochile of G. minimus has a keel that extends to the apex of the epichile. Taeniophyllum xizangense is similar to T. stella and T. radiatum, but it is distinguished from them by having much bigger flowers, inflorescences densely covered with short-bristly hairs, papillae on the external surface of sepals, and bigger triangular-ovate viscidium. Luisia simaoensis is similar to L. magniflora and L. ramosii, but can be easily distinguished from them by having lateral sepals longer than dorsal sepals and petals, lip with irregular and waved margins, and lip with bilobed apex. Luisia inconspicua is moved from Gastrochilus to Luisia based on phylogenetic analyses of plastid matK sequence data. Tuberolabium subulatum is similar to T. carnosum, but it can be easily distinguished from the latter by having an inflorescence much shorter than the leaves, yellow sepals and petals, and many small papillae outside the lip lobes.

Oberonia integrilabris (Orchidaceae), a new species from Yunnan, China, is described and illustrated. The species is most similar to O. jhae and O. segawae, but differs from O. jhae by its leaf basal joint, oblong petals with irregularly toothed margin and obtuse apex and is distinguished from O. segawae by its petals with irregularly toothed margin and obdeltoid lip with entire margin and acute apex. The conservation status of O. integrilabris is assessed as CR.

Gastrochilus prionophyllus , which was previously not validly published, is here validated. The species is described along with illustration and photos. Morphologically, the long and pendulous stem and distichous leaves of this new species indicate that it belongs to the sect. Microphyllae. It is unique in having thick fleshy leaves and margin significantly serrate, small flowers, reniform epichile and margin with dentations, thickened cushion on the central epichile and subconic hypochile. Meanwhile, a preliminary conservation status assessment according to IUCN Red List categories and criteria is given to the new species.

Bulbophyllum thαiorum and B. gyrochilum , two Chinese newly recorded species , together with B.mαcraei， a new record to Chinese Mailand are reported for the first time , and the descriptions and photos are provided.

Two newly recorded species of holomycotrophic orchids from China, Cyrtosia integra (Rolfe ex Downie) Garay, Galeola cathcartii Hook. f. are reported. Brief descriptions and photos of these two species are also provided.

Bulbophyllum didymotropis and B. protractum are newly reported to Chinese flora. Their descriptions and photos are also provided.

Four newly recorded species of Orchidaceae from Yunnan, China, Bulbophyllum careyanum (Hk.) Spreng., B. nipondhii Seidenf., Dendrobium bicameratum Lindl. and Habenaria amplexicaulis Rolfe ex Downie are reported. Brief morphological descriptions and photos of the species are also provided.

Bulbophyllumchrysolabium , a new species belonging to section Racemosae from Yunnan, China is described and illustrated. The species is related to B.orientale and B.morphologorum , but differs by having the following set of characters: obliquely broadly-based triangular petals with a long filiform apex; lip densely glandular papillose and conspicuously ciliolate along margins; lip auricles well developed, narrowly falcate, tapering to a long sharp point at the apex; stelidia subulate and twisted inwards, slightly exceeding operculum. The conservation status of B.chrysolabium is assessed and taxonomic notes are provided.