Table Of ContentMadrono, 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
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