Morphological comparisons of two pairs of easily confused species in subtribe Goodyerinae (Cranichideae; Orchidaceae) Author Liu, Qiao-Xiao Author Cheng, Zhi-Quan Author Tan, Hong-Yun Key Laboratory of Tropical Forest Ecology, Key Laboratory of Tropical Plant Resource and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yunnan 666303, China Author Hsu, Tian-Chuan Institute of Molecular & Cellular Biology, National Tsing Hua University, Hsinchu 30013, Taiwan, China Author Tian, Huai-Zhen text Phytotaxa 2015 2015-03-13 202 3 207 213 http://dx.doi.org/10.11646/phytotaxa.202.3.4 journal article 10.11646/phytotaxa.202.3.4 1179-3163 13641530 Rhomboda moulmeinensis (C.S.P. Parish & Rchb.f.) Ormerod (1995: 325) Type: — MYANMAR . Moulmein, Parish 237 ( holotype W , isotype K 000387635!). Homotypic synonyms: — Hetaeria moulmeinensis Parish & Reichenbach (1874: 142) ; Zeuxine moulmeinensis (C.S.P. Parish & Rchb.f.) Hooker (1890: 109) ; Odontochilus moulmeinensis (C.S.P. Parish & Rchb.f.) Tang & Wang (1951: 70–71) ; Anoectochilus moulmeinensis (C.S.P. Parish & Rchb.f.) Seidenfaden (1971: 307) . Heterotypic synonyms: — Anoectochilus multiflorus Rolfe ex Downie (1925: 412–413) . Type :— THAILAND . Doi Sutep , in very shady jungle to summit, Kerr 197 ( holotype & isotype K !); Odontochilus multiflorus (Rolfe ex Downie) Tang & Wang (1936: 7) . Flowering: —August–October. Habitat: —Under forests at 1400–1600 m . Distribution: — CHINA : Yunnan . Myanmar, Thailand. Additional specimens examined: — CHINA . Yunnan : Syemao , 1500 m , Henry 12724 ( K !) ; Menglian , Lafu , 1600 m , under evergreen broad-leaved forests, 21 November 2013 , Tan 802 6 ( HITBC !) ; Ruili City , Mt. Huyong , 1400 m , 10 August 2012 , Tian & Hu 697 ( HSNU !) ; MYANMAR . Moulmein , Lobb s. n . ( K000387712 !) . Notes: —Fig. 2B comprises three plants, the middle one (K000387636) without collector and collection number draws our attention because its lip is similar to that of Rhomboda fanjingensis , but the shape of leaves and calli are different. Probably it is an undescribed species, but more information and further study are needed before describing it. TABLE 2. Morphological comparison between Rhomboda fanjingensis and R. moulmeinensis . Characters R. fanjingensis R. moulmeinensis Leaves green or grayish green, midvein with a broad white stripe, green, midvein without white stripe, elliptic or ovate, conspicuous or not, ovate-lanceolate, 2.8–6.7 × 1.5–3.3 7.0–11.0 × 3.0– 4.2 cm , petiole-like base and tubular cm, petiole-like base and tubular sheath 1.2–2.7 cm sheath 1.5–4.8 cm Inflorescence 13.0– 15.5 cm , laxly 6–18-flowered 18.0–22.0 cm, laxly 14–22-flowered Floral bracts ovate-lanceolate, 5.0–11.0 × 3.0–5.0 mm ovate, ca. 8.0 × 3.0 mm Ovary and pedicel 9.0–13.0 × 1.5–2.0 mm 8.0–13.0 × 1.5–2.4 mm Dorsal sepal abaxially sparsely pubescent, 6.5–7.7 mm abaxially glabrous, ca. 9.0 mm Lateral sepals abaxially sparsely pubescent, spreading to reflexed, ovate- abaxially glabrous, spreading, broadly ovate, ca. 7.5 lanceolate, 7.0–9.0 × 3.0–4.0 mm × 5.0 mm Petals narrow-oblong, apex long acuminate, lateral side and suborbicular, apex curved, white, ca. 8.5 × 7.0 mm apex suffused with brick-red, 7.0–9.0 × 2.7–3.0 mm Hypochile reddish brown, 3.0–5.2 × 3.0– 4.5 mm , with flanges on the pink, 2.8 × 3.6 mm , flanges inconspicuous exterior surfaces Calli glands subcircular, about as wide as long glands clavate-oblongoid, about twice as long as wide Epichile lobes apical margin rugulate, erose or inconspicuous, 5.1–6.5 × apex margin erose, ca. 5.0 × 2.8 mm 4.5–4.7 mm Column 3.5–4.1 mm , with 2 parallel large wings, lug on both sides ca. 3.5 mm , with 2 parallel large wings, without lug of lower part of wings, lug apex irregularly denticulate