Paspalum urvillei Steud., Syn. Pl. Glumac.

Lee, Jeongran, Kim, Chang-Seok, Lee, In-Yong & Han, Young-Woo, 2013, First records of Paspalum notatum Flüggé and P. urvillei Steud. (Poaceae) in Korea, Journal of Species Research 2 (1), pp. 79-84 : 81-82

Paspalum urvillei Steud., Syn. Pl. Glumac. 1: 24.

1853.

Paspalum ovatum var. parviflorum Nees in C.F.P.von Martius, Fl. Bras. Enum. Pl. 2: 43 (1829).

Paspalum velutinum Trin. ex Nees in C.F.P.von Martius, Fl. Bras. Enum. Pl. 2: 43 (1829), pro syn.

Paspalum dilatatum var. parviflorum Döll in C.F.P.von Martius & auct. suc. (eds.), Fl. Bras. 2(2): 64 (1877).

Paspalum virgatum var. parviflorum Döll in C.F.P.von Martius & auct. suc. (eds.), Fl. Bras. 2(2): 89 (1877).

Paspalum larranagae Arechav., Anales Mus. Nac. Montevideo 1: 68 (1894).

Paspalum vaseyanum Scribn., Bull. Div. Agrostol. U.S. D.A. 17: 32 (1899).

Paspalum griseum Hack. ex Corrêa, Fl. Braz. : 128 (1909), nom. nud. ( Clayton et al., 2012).

Common name: Vaseygrass, Vasey grass ( Osada, 1989; Allen and Hall, 2007).

Korean name: Tul-Keun-Cham-sae-pee (ṂẗĝNjm) Perennial with a short (less than 1 cm) rhizomes. Culms densely tufted, robust, up to 220 cm tall, glabrous. Lower sheaths pubscent, upper sheaths glabrous; leaf blades linear, 12-60 cm long, 0.2-1.5 cm wide, mostly glabrous, a few long hairs at the base, apex attenuate; ligule membranous, 3-5 mm. Inflorescence axis 10-30 cm; a panicle consisted of 10-30 racemes; racemes 8-15 cm, narrowly ascending or suberect; spikelets paired; rachis ca. 0.5-1.1 mm wide. Spikelets light green or purplish, ovate, 1.8-2.8 mm long, 1.2-1.7 mm wide, sharply acute; upper glume membranous, 3-veined with laterals marginal, appressed pubescent on back, margins densely fringed with long white hairs; lower lemma similar to upper glumes but glabrous on back; upper lemma elliptic, striate, obtuse; palea 1.6-2.1 mm long.

Habitats. In moist, open, disturbed areas and roadsides.

Distribution. China, Hong Kong, Taiwan ( Chen and Phillips, 2006), Japan ( Osada, 1989), U.S.A., Bolivia, Argentina, Chile, Paraguay, Uruguay ( Allen and Hall, 2007; USDA, ARS, National Genetic Resources Program, 2012).

Specimens examined. Korea. Jeju-do: 1289-4 Beophwan-dong, Seogwipo-si , N 33̊14 ′11.28′′, E 126̊30 ′30.64′′, 30 Aug. 2011. C. S. Kim and J. Lee. Kim 201108-01~ 02 ( HCCN, 2 sheets) .

Paspalum urvillei is native to South America and widespread in tropical to warm-temperate regions of the world as a forage grass and weed ( Osada, 1989; Chen and Phillips, 2006). It was first found at Beophwan-dong, Seogwipo-si. Although the number of individuals of this species in a single area was rarely found they were distribut- ed in a large area along the roadside. Paspalum urvillei is similar to P. dilatatum because both species have long hairs on their margins of spikelets. They are, however, different in that P. urvillei has relatively small flower spikelets (1.8-2.8 mm long) compared to those (2.7-4.1 mm long) of P. dilatatum ; P. urvillei has 10-30 racemes while P. dilatatum has 2-7 ( Queensland Government, 2012). This species also could be a noxious weed in Jeju-do because it has already been regarded as one of noxious weeds in many countries including Australia and the United States especially in Hawaii (Pacific Islands Ecosystems at Risk, 2008; FloraBase, 2012). The Korean name, ‘Tul-Keun- Cham-Sae-Pee’ reflects that the plants have many hairs on the leaf sheaths and spikelets and are similar to P. dilatatum (Keun-Cham-Sae-Pee).

1 mm