Lecanorchis nigricans Honda emend. Suetsugu & Fukunaga

Suetsugu, Kenji, Shimaoka, Chie, Fukunaga, Hirokazu & Sawa, Shinichiro, 2018, The taxonomic identity of three varieties of Lecanorchis nigricans (Vanilleae, Vanilloideae, Orchidaceae) in Japan, PhytoKeys 92, pp. 17-35 : 21-23

Lecanorchis nigricans Honda emend. Suetsugu & Fukunaga Figs 2 , 3

Type.

JAPAN, Wakayama Pref., Nishimuro County, Iwata, Oka, date unknown 1931, K. Kashiyama s.n. (holotype TI!; Isotype TI!) .

Emended description.

Terrestrial, mycoheterotrophic herb. Inflorescence 10-25(-30) cm tall, solitary or branched at lower-half, white at flowering, black at fruiting, glabrous, ca. 0.8-2.0 mm in diam., with scale-like sheaths. Rhizome erect, J-shaped or complex, ligneous. Roots simple, radiate numerous, horizontally or downward elongate to 20-30 cm long, yellowish brown. Rachis 2-8 cm, 3-15 flowered, internode length of upper-half of rachis, 1-3 mm. Floral bracts triangular, acute, 1.0-2.0 mm long. Pedicellate ovary ascending, 15-25 mm long. Flowers enclosed or never opening. Sepals purplish white, linear, oblong-oblanceolate, ca. 11-14 mm long, 3.0-3.7 mm wide, apex obtuse. Petals purplish white, linear, oblong-oblanceolate, 13-14 mm long, 2.8-3.6 mm wide, apex obtuse. Lip spatulate, strongly 12-14 mm long, 3.2-3.9 mm wide in a natural situation, ca. 6.5-7.5 mm wide when flattened, disc with rather dense, short multicellular hairs which are often branched, near apex, or acute at apex in a natural situation. Column 10-12 mm long, 1.1-2.0 mm wide slightly recurved, fused with lip about 1/2 its length, ventrally glabrous or slightly puberulent; anther purplish white, ca. 1.5 mm wide. Capsule 17-30 mm long, cylindrical-fusiform, black, ascending at 70-90 degree angle from the axis. Flowering in late-June to mid-September.

Additional specimens examined.

JAPAN. Miyazaki Pref.: Nishimorokata County, Takaharu Town, 29 July 2016, Nobuyuki Inoue s.n. (OSA), JAPAN. Wakayama Pref.: Kamitonda Town, 3 Aug. 2016, H. Fukunaga s.n. (OSA, in spirit collection), Kamitonda Town, Oka 19 Aug. 2015, H. Fukunaga s.n. (MBK, in spirit collection), Nishimuro County, Iwata, Oka, 27 May 1929, K. Kashiyama s.n. (KYO), Nishimuro County, Iwata, Oka, 27 July 1929, K. Kashiyama s.n. (TI, KYO), Iwata, Oka, 13 July 1930, K. Kashiyama s.n. (KYO), Nishimuro County, Iwata, Oka, 14 July 1931, K. Kashiyama s.n. (TI), Nishimuro County, Iwata, Oka, 4 Aug. 1931, K. Kashiyama s.n. (TI), Nishimuro County, Iwata Village, August 1931, collector unknown (TSN), Nishimuro County, Iwata, Oka, 20 Sept. 1932, K. Kashiyama s.n. (KYO), Nishimuro County, Iwata, Oka, 20 Sept. 1933, K. Kashiyama s.n. (TI), Nishimuro County, Iwata, Oka, 1 Aug. 1933, S. Kitasima s.n. (KYO), Kamitonda Town, Oka 28 July 1984. S. Kashiyama 911 (MBK, in spirit collection), JAPAN. Kochi Pref.: Kochi City, Zigokudani 29 July 1978. Y. Sawa s.n. (MBK, in spirit collection), Kochi Pref., Kochi City, Zigokudani, 8 Aug. 1978, Yutaka Sawa O-86 (TI), Kochi City, Kouda, 26 July 2015, Hirokazu Fukunaga s.n. (OSA, in spirit collection), Kami County, Tosayamada Town, Aburaishi, 12 Aug. 1986, Yutaka Sawa 1138 (TI), Kami County, Tosayamada Town, Aburaishi, 12 Aug. 1986, Yutaka Sawa 1142 (TI), Kami City, Kahoku Town, 25 July 2016, Hisanori Takeuchi s.n. (OSA), JAPAN. Tokushima Pref.: Kaifu-County, Kainan Town, 18 July 1977. T. Nakagawa 1043 (MBK), JAPAN. Tokyo Metropolis: Izu Islands, Hachijo Island. 6 Dec. 1940, J. Ohchi s.n. (TI), Izu Islands, Hachijo Island. 28 July 2016, Masayuki Ishibashi s.n. (OSA).

Figures

Figure 2. Dissected flowers of Lecanorchis nigricans var. nigricans collected in Konda, Kochi, Japan on 26 July 2015 (OSA). A Flower and pedicellate ovary B Dissected flower C-D Lip and column E Column F Hairs at anterior disc of lip G Glabrous status at the ventral side of the column. Scale bars: A-E 5 mm F-G 1 mm. Photographed by Takuto Shitara.

Figure 3. Lecanorchis nigricans var. nigricans collected in type locality on 3 August 2016 (OSA). A Flower and pedicellate ovary B Column C Lip and column D Dorsal sepal E Lateral petal F Lateral sepal G Flattened lip H Anther cap I Hairs at anterior disc of lip. Scale bars: A-G 3 mm H 1 mm I 0.1 mm. Line drawings by Kumi Hamasaki.