276 Accepted by Mark Chase: 5 Feb. 2014: published: 11 Apr. 2014 Licensed under a Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0 PHYTOTAXA ISSN 1179-3155 (print edition) ISSN 1179-3163 (online edition) Copyright © 2014 Magnolia Press Phytotaxa 164 (4): 276–280 www.mapress.com/ phytotaxa/ Article http://dx.doi.org/10.11646/phytotaxa.164.4.6 Anoectochilus longilobus (Orchidoideae: Orchidaceae), a new species from Yunnan, China HUAI-ZHEN TIAN 1 , QIAO-XIA LIU 1 , ZHI-QUAN CHENG 1 , AI-QUN HU 2 & HONG JIANG 3 1 School of Life Sciences, East China Normal University, 200241 Shanghai, China 2 School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, HKSAR, China 3 Yunnan Academy of Forestry / Yunnan Laboratory for Conservation of Rare, Endangered & Endemic Forest Plants, State Forestry Administration, Kunming, 650204, China; E-mail: orchidchina@hotmail.com Introduction Anoectochilus Blume (1825: 411; Orchidaceae) belongs to subtribe Goodyerinae (Cranichideae; Orchidoideae; Pridgeon et al. 2003). The generic name is derived from the Greek words ‘anoiktos’ (open) and ‘cheilos’ (lip), referring to the flower with prominent lip giving an open appearance (Sumathi et al. 2003, Bhattacharjee 2013). The genus consists of about 30 species according to Genera orchidacearum (Pridgeon et al. 2003), distributed in India and the eastern Himalayas, through southern and southeastern Asia to Australia and the southeastern Pacific islands (Chen et al. 2009). There are 15 species of Anoectochilus in China, eight of which were reported from Yunnan previously (Chen et al. 2009, Chen & Shui 2010, Hu et al. 2012, Ormerod 2013). A species of Anoectochilus was collected in Yunnan by the authors in 2006 and 2013. On the basis of careful examination and comparison with closely related species (Seidenfaden 1971, 1978, Seidenfaden & Wood 1992, Lang 1999, Averyanov 2008, Chen et al. 2009), it has been confirmed as an undescribed species. This new species is similar to A. zhejiangensis Wei & Chang (1989: 39), which is endemic to China and distributed in central and northern Fujian, northern Guangxi, southwestern Zhejiang (Chen et al. 2009) and northern Guangdong (Tian et al. 2013); it is also close to A. chapaensis Gagnepain (1931: 679), which is distributed in China and Vietnam (Chen et al. 2009). Anoectochilus longilobus H.Jiang & H.Z.Tian, sp. nov . (Figs. 1, 2A, B, D–F and H–L) Anoectochilus longilobus is similar to A. zhejiangensi and A. chapaensis, but differs from the former in having much bigger leaves and flowers and a straight spur with an acute angle between lip and from the later in having a cylindrical spur; it is distinguished from both by having longer, obliquely ligulate obcuneate, truncate epichile lobes. Type:—CHINA. Yunnan: Malipo, Mt. Laojun 1550 m, in forests, 28 July 2006, Jiang 04240 (holotype KUN!). Terrestrial herbs up to 28 cm tall including inflorescences. Rhizome cauliform, creeping, rooting at nodes. Stem 5 mm in diam. Leaves 2–5, ovate, acute, nearly round at base, 2.5–6.0 × 1.5–4.5 cm, margin crenate, 3–5-veined, velvety blackish green to nearly dark purple, with sparse or minimal pale green reticulation above, pale pink beneath; petiole ca. 5 mm long, sheathed, amplexicaul, 0.8–1.0 cm long, sheaths 5–7 mm long. Inflorescence 4–10 flowered; peduncle 10–15 cm long, with articulate glandular hairs; sterile bracts 2–3, pale red, ovate-lanceolate, acuminate, triveined, 8.0–15.0 × 0.8 mm, sparsely hairy; rachis 4–6 cm long; floral bracts similar to sterile bracts, 10 × 6 mm, rose, apex pointed, hairy. Ovary with pedicel fusiform, green brown, ca. 17 × 3 mm, densely hairy, white. Flowers non-resupinate. Sepals pale pink to green brown with rose apices and sparse hair outside. Dorsal sepal ovate, acuminate, ca. 7.0 × 4.5 mm, concave, appressed to petals, forming a hood. Lateral sepals obliquely oblong elliptic, subacute, spreading to reflexed, ca. 8 × 4 mm, 1-veined. Petals glabrous, dimidiately falcate- elliptic, oblique, sharply narrowed towards apex, white, pale olive-green at base and with a rose vein along the inner side, ca. 7.0 × 2.5 mm. Labellum forward-projecting, Y-shaped, white, spured, ca. 1.8–2.0 cm long, white,