Table Of Content

Madrono, Vol. 55, No. 2, pp. 159-160, 2008 MUHLENBERGIA ALOPECUROIDES (POACEAE: MUHLENBERGIINAE), A NEW COMBINATION Paul M. Peterson' Department of Botany, MRC-166, National Museum of Natural History, Smithsonian DC Institution, Washington, 20013-7012 Travis Columbus J. Rancho Santa Ana Botanic Garden, 1500 North College Avenue, Claremont, California 91711-3157 Abstract A new combination, Muhlenbergia alopecuroides (Griseb.) P. M. Peterson & Columbus, is made based on published and ongoing molecular phylogenetic studies. Resumen Se propone una nueva combinacion, Muhlenbergia alopecuroides (Griseb.) P. M. Peterson & Columbus, basada en estudios filogeneticos moleculares publicados y en curso. Key Words: Lycurus setosus, Muhlenbergia alopecuroides, Muhlenbergiinae, Poaceae, taxonomy. The grass subtribe Muhlenbergiinae (Chlori- changes based on these results. Herein, in doideae: Cynodonteae) recently has comprised 10 preparation for the second edition ofThe Jepson genera: Aegopogon Humb. & Bonpl. ex Willd., Manual (Baldwin et al. in prep.), we transfer Bealia Scribn., Blepharoneuron Nash, Chabois- Lycurus setosus (Nutt.) C. Reeder, which was saea E. Fourn., Lycurus Kunth, Muhlenbergia sampled in the Columbus et al. (2007) study, to Schreb., Pereilema J. Presl, Redfieldia Vasey, Muhlenbergia. Schaffnerella Nash, and Schedonnardus Steud. (1D9u95v,all19e9t7,al.2010919a4,; P2e0t0e7)r.sonMe2m00b0e;rPsetoefrsMounhletenal-. Muhsloennb&erCgoilauamlboupsec,urcooimdebs.(nGorivs.ebL.y)cPu.ruMs. aPleotpeer-- bergiinae are characterized by ligules usually curoides Griseb., Abh. Konigl. Ges. Wiss. membranous and eciliate; the inflorescence re- Gottingen 19:255-256. 1874. Type: Argentina, branched or ofspicate primary branches, branch Prov. Catamarca, ca. Belen, en el altivalle de axes persistent or fallingentire; spikelets bisexual, Las Granadillas, Feb 1872, P. G. Lorentz s.n. staminate, or sterile, solitary, rarely paired or in (Holotype: GOET; Isotypes: BA!, BAA!, triplets, occasionally secund, glumes awned or CORD!, SI!, US-996080 fragm. ex GOET!). unawned, floret usually 1; lemmas 3-nerved, awned or unawned; cleistogenes occasionally Pleopogon setosum Nutt., Proc. Acad. Nat. Sci. present in the leaf sheaths; and a base chromo- Philadelphia 4:25. 1848. Lycurus setosus some number o^x = 8-10. (Nutt.) C. Reeder, Phytologia 57:287. 1985. A phylogenetic study of Chloridoideae based Type: U.S.A., New Mexico, Santa Fe Co., on trnL-F(cpDNA) and ITS (nrDNA) sequences mountains near Santa Fe, 1841 or 1842, W. (Columbus et al. 2007) has revealed that Muh- Gambel s.n. (Holotype: K; Isotypes: PH, US- lenbergiinae are monophyletic but Muhlenbergia 610839 fragm. ex K!). itshepasruabpthryilbee.tiWcewitahndrecsoplelcetagtuoetshearoetcheorndguecnteirnagian basCeodmmeonnts.theThbeasnieownycmombPilneaotpioognoncansneottosubme phylogenetic study focused on Muhlenbergiinae because the epithet in Muhlenbergia [as M. setosa in which all species are targeted for sequencing. (Kunth) Trin.] was previously used. Therefore, TrnL~F and ITS sequences from most species we are using the next available name, Lycurus have been obtained and analyzed (J. T. Colum- alopecuroides, as the basis for the new combina- bus et al. unpubl. data). The monophyly of tion. Muhlenbergiinae and paraphyly ofMuhlenbergia In California, there are 19 species of Muhlen- are consistent outcomes in all analyses of this bergia including M. alopecuroides (Peterson 1993, il l2a0r0g1eb,an2d00e4)x.panWdeingardeataproseptos(iPnegtertsaoxnoneotmialc. 2002, in press). In the first edition ofThe Jepson 1 Manual (Hickman 1993), M. alopecuroides was j mistakenly treated as Lycurus phleoides Kunth 'Author for correspondence, email: [email protected] instead of L. setosus (Smith 1993, 2002). Muh- I MADRONO 160 [Vol. 55 lenbergia alopecuroides can be distinguished from California. University of California Press, Berke- L. phleoides by having leaf blades with fragile, ley, CA. awnlike tips (3-)4-7("12) mm long (blades acute . In press. Muhlenbergia. in B. G. Baldwin, S. or with bristles 1-3 mm long in L. phleoides) and Boyd, B. J. Ertter, D.J. Keil, R.W. Patterson,T.J. longer ligulesmtmhat are (2 )3-10( 12) mm long mRoasnauttail,ofanhdighDe.r pHl.antWsiolfkeCanlif(eodrsn.i)a.,T2hned eJdietpisoonn. (ligules 1.5-3 long in L. phleoides) [Reeder University ofCalifornia Press, Berkeley, CA. 2003]. Muhlenbergia alopecuroides has an amphi- , J. T. Columbus, R. Cerros T., and M. S. tropical distribution, occurring in the southwest- Kinney. 2001b. Phylogenetics of Muhlenbergia ern United States, northern Mexico, southern and relatives (Poaceae: Chloridoideae) based on Bolivia, and northern Argentina. Based on internal transcribed spacer region sequences allozyme variation, it seems likely that the species (nrDNA). Botany 2001 Abstract available at: recently dispersed to South America because www.botany2001.org/section12/abstracts/33.shtml p(PoeptuelrastoinonasndthMeroerrcoonnteai1n99l8e;ssPegteenrestoicn 2v0a0r0i)a.tion Cer,ros-Tlat,ilNp.a,F.anRdefMu.liS.o-KRiondnreiyg.ue20z0,4.RA. phylogeny of the Muhlenbergiinae (Poaceae: Chloridoideae: Cynodonteae) based on ITS and Acknowledgments trnL-Fsequences. Botany 2004 Abstract available We would like to thank the Smithsonian Institution at: www.2004.botanyconference.org/engine/search/ and the National Geographic Society for financial index.php?func=detail&aid=38 tshueppSoprat,niasnhdrPeasturmiecina.GomezBustamonteforcorrecting fic,ation and, AbNioDgeSo.gJr.apPheynnoifnNgteown.Wo2r0l0d7.grCalsassessi:- |i Chloridoideae. Aliso 23:580-594. j Literature Cited ANDO. MoRRONE. 1998. Allelicvariationinthe \ amphitropical disjunct Lycurus setosus (Poaceae: Baldwin, B. G., S. Boyd, B.J. Ertter, D. J. Keil, R. Muhlenbergiinae). Madrono 44:334-346. W(e.ds.P)atItneprrseop.n,ThTe. JJ.epRsoosnatmtain,uaanldofD.hiHg.heWripllkanetns CalifAoNrnDiaRg.rasJ.sesSO(RPoEaNcGe.ae)2.00P7p.. S7y-s2t0emiantiMc.s Ro.f I oPrfesCsa,liBfoerrnkieal,ey2,nCdAe.dition. University ofCalifornia (Setdrs.o)m.beErgc,oloJ.gyD.anCdorbmian,naagnedmeCn.tMo.f DC'aAlniftoornniioa |' Columbus, J. T., R. Cerros-Tlatilpa, M. S. Kin- grasslands. University of California Press, Berke- ney, M. E. Siqueiros-Delgado, H. L. Bell, ley, CA. 2M0.07P..PGhryilfofgietnhet,iacsndofNC.hlFo.rRideofiudleiaoe-(RGordarmiingeuaeez).: ZuL,OAGA, ,AGN.DDaEv.idJ.seJ,uDTZ.iSE.WiFcizl.gu2e0i0r1aas., CFa.tOa.- . a preliminary study based on nuclear ribosomal logue of New World grasses (Poaceae): II. Sub- internal transcribed spacer and chloroplast trnL-¥ family Chloridoideae. Contributions from the | sequences. Aliso 23:565-579. United States National Herbarium 41:1-255. | DuvALL, M. R., p. M. Peterson, and A. H. , R. D. Webster, andJ. Valdes-Reyna. 1995. Christensen. 1994. Alliances of Muhlenbergia Subtribal classification ofthe NewWorld Eragros- (Poaceae) within New World Eragrostideae are tideae (Poaceae: Chloridoideae). Sida 16:529-544. i iredsetnrtiicftiieodn bsyitesphyflroogmeneptliacstiadnaDlyNsAiss.ofAmmearpipceadn Wor,ld Erag,rAosNtDideae (Po.ac1e9a97e.: GCehnleorriadooifdeNaee)w. i Journal ofBotany 81:622-629. Smithsonian Contributions to Botany 87:1-50. Hickman, J. C. (ed.). 1993.TheJepson manual: higher Reeder, C. G. 2003. Lycurus. Pp. 200-203 in M. E. i plantsofCalifornia. UniversityofCalifornia Press, Barkworth, K. M. Capels, S. Long, and M. B. Piep Berkeley, CA. (eds.). Magnoliophyta: Commelinidae (in part): Peterson, P. M. 1993. Muhlenbergia. Pp. 1272-1274in Poaceae, part 2. Flora ofNorth America north of J. C. Hickman (ed.). The Jepson manual: higher Mexico, volume 25. Oxford University Press, New plants ofCalifornia. UniversityofCalifornia Press, York, NY. Berkeley, CA. Smith, J. P. Jr. 1993. Lycurus. Pp. 1270 in J. C. p1 . 2000. Systematics of the Muhlenbergiinae Hickman (ed.). The Jepson manual: higher plants (Chloridoideae: Eragrostideae). Pp. 195-212 in of California. University of California Press, S. W. L. Jacobs and J. Everett (eds.). Grasses: Berkeley, CA. systematics and evolution. CSIRO, Melbourne. . 2002. Lycurus. Pp. 584 in B. G. Baldwin, S. . 2002. Muhlenbergia. Pp. 586-588 in B. G. Boyd, B. J. Ertter, R. W. Patterson, T. J. Rosatti, Baldwin, S. Boyd, B. J. Ertter, R. W. Patterson, and D. H. Wilken (eds.). The Jepson desert T. J. Rosatti, and D. H. Wilken (eds.). The Jepson manual: vascularplantsofSoutheasternCalifornia, desert manual: vascular plants of Southeastern University ofCalifornia Press, Berkeley, CA. i