Miscanthus wangpicheonensis T.I. Heo & J.S. Kim, 2021

Heo, Tae-Im, Kim, Jung-Hyun & Kim, Youn-Bong Ku and Jin-Seok, 2021, Miscanthus wangpicheonensis T. I. Heo & J. S. Kim (Poaceae): A new species from Korea, Journal of Species Research 10 (1), pp. 57-62 : 57-61

Miscanthus wangpicheonensis T.I. Heo & J.S. Kim ,

sp. nov. ( Figs. 1-3 )

Type. Korea. Gyeongsangbuk-do: Uljin-gun, Geunnam-myeon, Susan-ri , Wangpicheon , 36°58′15.06″N, 129°24′ 34.76″E, elev. 1 m, 14 Aug 2020, [heo20101 holotype. KB ( NIBRVP0000779340 ); isotype. KBA] .

Korean name. Mul-eok-sae-a-jae-bi (ṞḍNjỌNjffi)

Herbs perennial, rhizomatous. Rhizome long-creeping, 2-4 mm diam., hard, covered by scales. Culms erect, 50- 80 cm tall, solid, unbranched or branch; nodes hairy (hairs 0.5-1.5 mm long). Leaves cauline; leaf sheaths striate, glabrous or hispid; leaf blades linear, flat, 10-30 × 1-1.5 cm, glabrous, base tapering, straight or rounded, margins scabrid, apex acuminate; midrib prominent, white; ligule ca. 0.5 mm long, margin ciliate; collar glabrous or pilose. Panicle 7-20(-25) cm long; axis 4-8(-14) cm long, glabrous or pilose at base. Racemes 4-15, 5-20 cm long; rachis internodes glabrous or slightly pilose, nodes pilose; lower pedicel 1-1.3 mm long, upper pedicel 3-3.6 mm long. Spikelets 5.1-5.3 mm long, pilose, awned; callus hairs (3-) 5-7.5 mm long, exceeding the spikelet, white, silky; glumes subequal, 5-5.2 mm long, bright yellow to yellow-orange; lower glume oblong-lanceolate to lanceolate, 5.0- 5.2 mm long, apex acuminate, two-toothed, coriaceous, prominent 3-5-veined, pilose with long hairs on abaxial surface, apex and margin densely pilose with 2-5 mm long hairs; upper glume lanceolate, 4.9-5.0 mm long, apex acuminate, coriaceous, 1-3-veined, slightly pilose with long hairs on abaxial surface, apex and margin pilose with 0.2-3 mm long hairs; lower lemma, narrowly oblong, apex obtuse, membranous, hyaline, ca. 4.2 mm long, inconspicuously (1-)3-veined, pilose with long hairs on margins; upper lemma linear-lanceolate or oblanceolate, 3.5-4 mm long, membranous, inconspicuously 1-veined, pilose with long hairs on margins, apex acuminate, apex and margin densely pilose with long hairs; awn exserted between the teeth of upper lemma, 4.5-5.5 mm long, geniculate, lower part twisted; upper palea ovate-lanceolate, ca. 2.5 mm long, membranous, veinless, apex and margin ciliolate. Stamens 3, anthers ca. 3 mm long. Style ca. 0.6 mm long. Stigmas purple-black, 1.2-1.5 mm long. Ovary orbicular-ovate or suborbicular, 0.2-0.3 mm long ( Table 1).

Additional specimens examined. Korea. Gyeongsangbuk-do: Uljin-gun, Geunnam-myeon, Susan-ri , Wangpicheon , 36°58′15.06″N, 129°24′34.76″E, elev . 1 m, 25 July 2017, kjs17096, 17097 ( KB) ; 17 Sep 2019, kjs19040, 19041, 19042, 19043 ( KB) ; 23 Aug 2020, heo20102, 20103 ( KB) .

Flowering. late July to October.

Distribution. Korea (Gyeongsangbuk-do), endemic to Korea.

Habit. Sunny places of riverside.

Etymology. The specific epithet, “ wangpicheonensis ”, is based on the name of the locality where the new species is found.

Figures

Fig. 1. Illustrations of Miscanthus wangpicheonensis T.I. Heo & J.S. Kim. A. Habit. B. Spikelets. C. Lower glume. D. Upper glume. E. Lower lemma. F. Upper lemma.

Fig. 2. Photographs of Miscanthus wangpicheonensis T.I. Heo & J.S. Kim. A. Habitat of Uljin-gun (25 July 2017). B. Habit. C. Rhizome. D. Ligule. E. Collar. F. Node. G. Panicle. H. Spikelets. I. Lower glume. J. Upper glume. K. Lower lemma. L. Upper lemma. M. Stamens. N. pistil. Scale bars=1 cm(C, G), 5 mm (D-F), 1 mm (H-N).

Fig. 3.Holotype of Miscanthus wangpicheonensis T.I. Heo & J.S. Kim (KB).