Miscanthus wangpicheonensis T. I. Heo & J. S. Kim (Poaceae): A new species from Korea Author Heo, Tae-Im Baekdudaegan Biodiversity Conservation Division, Baekdudaegan National Arboretum, Bonghwa 36209, Republic of Korea Author Kim, Jung-Hyun Plant Resources Division, National Institute of Biological Resources, Incheon 22689, Republic of Korea Author Kim, Youn-Bong Ku and Jin-Seok text Journal of Species Research 2021 10 1 57 62 journal article 10.12651/JSR.2021.10.1.057 2713-8615 13139236 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 ). 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). Table 1. Comparison of diagnostic characters among Miscanthus wangpicheonensis and two closely related taxa in Korea.

Taxa
Characters
M. sacchariflorus	M. wangpicheonensis	M. longiberbis
Height (cm)	80-250	50-80	60-100
Length of leaves (cm)	(20-)30-100	10-30	10-30(-40)
Width of leaves (mm)	14-33	10-15	6-14
Hairs of collar	pilose	pilose or glabrous	glabrous
Length of racemes (cm)	4-40	5-20	10-12
Number of racemes	4-30(-70)	4-15	5-7
Length of spikelets (mm)	4.0-6.5	5.1-5.3	5-6
Colour of callus hairs	white	white or purplish white	yellowish white or purplish white
Length of callus hairs (mm)	7-15	(3.0-)5.0-7.5	4.5-8.0
Number veins on the lower glume	2-3	3-5	3-7
Number veins on the upper glume	0-1	1-3	3-5
Awn of the upper lemma	absent	present	present
Length of awn (mm)	-	4.5-5.5	7-8
Length of anthers (mm)	1.5-3.0	3	2.5-3.0

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.