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A New Endemic Species in Trichophorum (Cyperaceae) from South Korea Jongduk Jung and Hong-Keun Choi* Department of Biological Science, Ajou University, Suwon 443-749, South Korea. *Author for correspondence: [email protected] Abstract. Trichophorum dioicum J. Jung & H. K. season, and achene shape in Scirpus s.l.—are variable Choi (Cyperaceae) was observed growing on limestone characteristics and so are inconclusive. Dioecism is won-do, South Korea. Morphological characteristics of sperms (Dellaporta & Calderon-Urrea, 1993) and has the new species, such as the reduced leaf blade and the single spikelet at the culm terminus, correspond to as Carex L., Scleria P. J. Bergius, and Everardia Ridl. Trichophorum Pers., a sister genus among Scirpus L. (Bruhl, 1995; Goetghebeur, 1998). Moreover, the s.l. Previous molecular analysis of the chloroplast rbcL entity described as dioecious by Lee and Oh (2006a, gene and ITS region of nuclear ribosomal DNA b) is actually polygamous. The bisexual flowers and supported the identity of this new endemic species (partially bisexual), while female plants present only Key words: Cyperaceae, IUCN Red List, South female flowers. Morphologically, this taxon shares Korea, Trichophorum. synapomorphy with Trichophorum. In addition to these Recently, a new endemic sedge, identified as and nuclear ITS DNA sequences display greater similarity to the type of Trichophorum (T. alpinum (L.) & Oh, 2006b: 614). They compared this species with Pers.) than to other species of Scirpus s.l. (unpub¬ S. cespitosus L., which is very similar in morphology, lished GenBank accession numbers FJ797640 and and indicated the dioecism of the new taxon. FJ797641). We suggest that the new taxon does not However, the type was not specified and the name belong to Scirpus and that its phylogenetic identity was invalidly published (cf. Art. 37.7, McNeill et al., lies within Trichophorum, which is caespitose and 2co0n0c6e).p t Loefe S cairnpdu s OLh., w(2h0ic0h6 bi)n cmluadiendt aninuemde roa usb rtoaaxda rbhlaizdoem, aatnodu sa, sainndg leh assp ilkigeulelat tae t ltehaev ecsu,l ma rteerdmucineuds .l eaf such as Trichophorum Pers., Bolboschoenus (Asch.) Ps“daNiaomleeloeacs ,i ycoaieurnapsdru , ss Set,”hdc heg obese aa(nsmLoeepdeel e a&coutnt uh Oso thhr(,sRe 2 cr0ehc0phb6o.a)arr ta:Pe cd2atl 5ela)ra. i. ns HteLiwcoaswt egereov,n fei urnt,s h ,tt ehhaieesr NnFLolee.vte . K &Sioc rrYiferup.a u Cs2d. : i doOi6ioch1iu,c4 suB, s(u Y[lY1l.5 .. N KNS. o.eL rpLee.a]ee e P&2 &l0 . 0Y RY6. ,e. C sCn.. o.6O m:Oh .2)h 5,iY n,N .v [ea2Nwl0.. egosfr otSaucsbpielr viapsenuhrdsea dlis s . lug.g peehonnaneesr ra tahlb leye e(iaKnnc vocryaeelapcimdtoe agdn,n aaimzs1e ae9d 7t fa8arxo;s om naB o 2mrp0uoi0hcl6yl ,c.p ohm1y9lpe9lte5ixc; 2iDKs0ooe0ctrye8.]pa ]e(.2,9 0 AG0flJ6a.O)n,, UgJnw).o. o mJnFu.-i dgnouign:r ve8a J0l1e.4.o 0nT2gY0se Po(Ehn:o- gloKutnoy,rp eea,1 7A[ SJAoOupUtrh;. Goetghebeur, 1998). One segregated genus, Tri¬ bracts, and an inflorescence with a single or few spikelets and bisexual flowers (Goetghebeur, 1998). Perennial, polygamous, shortly ] Moreover, a molecular phylogenetic study based on oots fibrous; culms densely tufted, erect, glabrous, analyses of the chloroplast rbcL gene and tmL-F triate, 5-20 cm, 0.3-0.8 mm diam., elongating to -0 cm at maturity. Leaves reduced, ligulate, triangular independent from Scirpus s.l. (Muasya et al., 2009). ristate, membranous, awns 2-10 mm. Inflorescence separate genus (Lee & Oh, 2006a)—habitat, flowering f a single spikelet at culm terminus, composed of doi: 10.3417/2009036 Novon 20: 289-291. Published on 13 September 2010. 290 Novon