CALAMAGROSTIS COAHUILENSIS AND C. DIVARICATA (POACEAE: POOIDEAE: AGROSTIDINAE), TWO NEW SPECIES FROM MÉXICO

2004·4.2 MB·English

by  Paul M Peterson

CALAMAGR0STI5COAHUILENSISANDC.DIVARICATA
(POACEAE:POOIDEAE:AGROSTIDINAE),
TWONEWSPECIESEROMMEXICO
PaulM.PetersonandRobertJ.Soreng JesusValdes-Reyna
DepartmentofBotany DepartamentodeBotanica
NationalMuseumofNaturalHistory UniverisidadAutonomaAgraria"AntonioNarro"
SmitfisonianInstitution Buenavista,Saltillo
Washington,DistrictofColumbia20013-7012,U.S.A. Coatiuila25315,MEXICO
[email protected];[email protected] [email protected]
ABSTRACT
CalamagrostiscoahuUensisP.M.Peterson.Soreng&Valdes-Reyna.sp.nov.,andCalamagrostisdharicata
oP,cMc.urPsetoenrsconal&caSroeroeunsg,slsop,pensov.m,ftrhoemmMoeuxnitcaoianrsedofesscoruitbleideaasntderinllCusotarhauteidl,aCaanldamsaogurotsftiiwsecsotaelrinuNiIuccns\ios
Leon;andCdivaricataoccursonmoistslopesandmossycliffsofsouthwesternDurango.
CalamagrosliscoahuilcnsisismorphofogicallysimilartoCpurpurasccnsbutdilIcrsbyhavingshorter
anthers(1-1.2mmlong),nearlysmoothligules,scaberulousrachises,glabrousorminutelyantrorsely
scabroussheathsummits,andsomewhatdensebutnotspikelike,greenishpanicles,Calamagrostis
divaricataseemsmorphologicallyalliedtoCpringleibutdiffersbyhavingwiderpanicles(4-10
cm)withbranchesreilexedspreadinganddivaricate,shorterspikelets(.3.4-4.3mmlong),shorter
glumes(3.4-4,3mmlong)thatarebothIveined,andshorterlemmas(3,8-4.3mmlong)withan
awninsertedonupper1/4to1/3.
RESUMEN
SedescribenyseilustranparaMexicoCalamagrostiscoahuUensisRM,Peterson,Soreng&Valdes-
Reyna,sp,nov,,yCalamagrostisdivaricataRM,Peterson&Soreng,sp,nov,Calamagrostiscoahuihnsis
seencuentraenladerascalcareasenlasmontafiasdelsurestedelestadodeCoahuilaysuroestedel
estadoNuevoLeon:yCdivaricataseencuentraenladerashumedasyriscosmusgososdelsuroeste
delestadodeDurango,CalamagrostiscoahuUensisesmorlologicamentesiinilaraC,purpurasccns
perodifiereenposeeranterasmascortas(1-1.2mmlargo),ligulascasilisas,raquisescaberuloso,apices
delasvainasglabrosoescasamenteconescabrosidadantrosa,ypaniculasdensasperonoespigadas,
decolorverdusco.CalamagrostisdivaricataparecemorfologicamenterelacionadoaC.pringleipero
ddiifviaerriecaednas,poessepeirguiplalnaiscmulaasscomratsasa(m3p,4l-i4a,s3m(4m-1l0arcgom)),gclounmarsammiafsiccaocritoanse(s3,r4e-l4l,e3xams,melxatregon)diadmabsasy
uninervadas,ylemasmascortas(3.8-4.3mmlargo)conunaaristainsertadadesde1/4hasta1/3
arribadelamitad.
Calamagrostisischaracterizedashavingsingle-!loweredspikelets,oneorthree-
veinedglumesaslongorexceedingthefloretinlength(rarelyslightlyshorter),
non-keeledlemmasthataremembranousorcartilaginous(infrequentlyhya-
line),usuallywithasingledorsallyattachedawn(rarelyawnless),acalluswith
acrownofhairs,caryopseswithshorthilumsandwithoutapicalhairs,and
lodiculesthatareapicallymembranous(Clayton&Renvoize1986;Watson&
SIDA21(1):311-320.2004
312 BRIT.ORG/SIDA21(1)
Dallwitz1992).Worldwide,Calamagrostisincludesbetween 230(Watson&r
Dallwitz1992)and263(reportedbyD.Clayton&rB.Simon,pevs.comm.2004)
species.InNorth,Central,andSouthAmerica131speciesarereportedinSoreng
etal.(2003).InMexicothelollowing11speciesolCdlamd^i^wstisarerecognized:
C.crcctijoUaHitchc,C.cnantha(Kunth)Steud..C.guatcmalcnsisllitchc,C.
intenncdia(J.Presl)Steud.,C.ondzcihcic(Rupr.e.\E.Fourn.)Beal,C.piinglci
Scribn.exBeal,C.purpurascensR.Br.,C.rigcsccns(j.Presl)Scribn.,C.tolucensis
(Kunth)Trin.exSteud.,C.validaSohnslsyn.=C.ivcvauglici Sohns;McVaugh
(1983)wasthelirsttoselectthisnameasasynonym,seeArticle11.5forequally
publishedspeciesintheCodeolBotanicalNomenclature(Greuteretal.2000)1,
andC.vukaniLciSwallen(Chimal1987;Hspcjo-Sernaetal.2000).
Whilecollectinggrassesandspecilicallysearchingloruniquelormsol
TnsctuminDurango,Mexico(Finotetal.2004)inthefallof200.3thefirstau^
thorgatheredaspecunenthatseemedtobeanundescribedspecies.Atlirst
glancethisspecimenappearedtobetwoorrriorcIloweredbutuponcloserin-
spectionandundermagnilicationallspikeletscontaniedasingleIloret.Alter
studyingmorphologicallysimilarmaterialfromMexicocollectedbythelirst
author,anadditionalundescribedspecieswasloundmCoahuila.Thetwonew
speciesareclearlymembersol subfamilyPooideae,tribePoeae,subtribe
Agrostidinae(Sorengetal.2003,2004).Wedescribethesetwospecimensas
newspeciesofCahimagm:<tis.
CalamagrostiscoahuilensisRM.Peterson,Soreng&Valdes-Reyna,sp.nov.(Figs.
1,2).T\rr-MHXICO.Cc:)AtlUlLA.SierraMadreOriental,32miSEofSaltilloand8
miSI:ofJamconroadroSierraLaViga,3240m.29Sc]:)1990,RM.Pctersoi].C.R.
Aundblc&j.Vcildcs-Rcyua10051b{l\o\xy\'\PF:.US'j.
ACalamii\^i'osliimipunisci'niiR3r.antlicrls1-1.2mmlongis.ligulisIcrclai-\'i,i;aiis,rliucliibus
scaberulis,\'aginaapicalighibra\'clscabi'cllaaninirsc.panicuhsaHquaniuindensisscclnonspicae
similibiLS,viridis.reccdit,
Caespitciseperennialwithintravaginalandextravaginalshootinitiation.Culms
(22-)40-100cmrall,erect,glabrous;internodesglabrous.Sheaths6-28cmlong,
shorterthanthemternodes,glabrous,oltenlibrousbelowwithage;margins
smooth;cataphyllsandK^wersheathsglabrous;summitglabrousorminutely
antrorselyscabrous.Ligules5-8mmlong,membranousoltenlacerate,Hrmer
below,nearlysmooth,apexobtusetoacute.Blades8-20cmlong,2-4mmwide.
Hat.apicallyacuminate,glabrous,scabrousabo\'e.Panicles(7-)9-20cmlong,
0.5-1.2cmwide,contracted,somewhatdensebutnotspike-like,greenish;ra-
chisscaberulous; inlK^'escence branchesmostly 2-10cm longbelow,the
tbrwaoncpheers,noadsec.eSnpdiiknegleatnsd5t.i8g-h7t.h2'mapmprelosnsge,d,1-mtolsotwlesr'eIdl,ortiiglhetrloyusanpeparrebsasseed,otnoethoer
branches,darkgreenish;pedicels0.6-4 mm long,ascending,scaberulous;
rachilla2.4-3mmlong,coveredwithstillhairs,thehairs0.5-1mmlong.Glumes
5.8-7.2mmlong,lanceolate,aboutccjualorsubequalinlength,longerthanthe
PETERSONETAL.JWONEWSPECIESOFCALAMAGROSTISFROMMEXICO 313
hQ.l.CalamagrostiscoahuHensis{Peterson,Annable&Valdes-ReynaJ005/6).A.Habit.B.Inflorescence.C.Sheath,ligule,
andblade.D.Spikelet.E.Lowerglume,dorsalview.F.Upperglume,dorsalview.G.Floret,lateralview.H.Lemma,lateral
view.I.Lemma,dorsalview.J.Paleawithrachilla,dorsalview.K.Stamens.I.Pistil.M.Lodicules.N.Caryopsis,dorsal
view.
314 BR1T.ORG/SIDA21(1)
-C.divaricata
200miles A-C.coahuilensis k V1 /,Zacatecas''I\SaPontoLsuiis"\^^^T.a,maulipas(
Fic.2.DistributionofCalamagrostiscoahuilensisandC.divaricatainMexico.
floret,membranous,1-vemed,scaberulousalongveni;marginshyaline;apex
acute.Lemmas5-5.7mmlong,lanceolate,membranous,yellowish-green,con-
spicuously5-veinednearbase,scaberulous,awned;apexacute,entireorbifid;
awn8~10mmlong,goldenbelowandpurplishabove,bornenearthebaseon
thelower1/6,insertedinagroovebelowandtwistedandonce-geniculateabove;
callusobtusewithwhitehairs,thehairs0.8-1.8mmlong.Paleas5-5.6mmlong,
aboutaslongasthelemma,hyaline,2-veined,theveinsscaberulous,green;apex
acute,entire.Lodiculesca.1mmlong,hmceolate,lobed,glabrous.Stamens3;an-
sthteirgsma1-s1.2,2fmeamthelroyn,g,whpiutripslhe..COavrayroypscae.s02.-22m.5mmlmongl,onggl,abfursoiufso;rsmt,ylleisgh2t,gsreepeanriasthe.;
Phenology.—FloweringinlateAugust,September,andearlyOctober.
Distribution—Ccilamagmsliscoahuilensisisknown(romthemountains
ofCoahuilaandNuevoLeongrowingoncalcareousslopeswithAbiesmexicana
Martinez, Pinusculmirncola Andresen &Beaman, P. hartwegii LindL,
Hesperostipaspartea(Trin.)Barkworth,PoarupreehtiiPeyr,Holodiscusdiscolor
(Pursh)Maxim.,Quercusgreggii(A.DC.)Trel.,andscatteredPopulustremuloides
Michx.
Additionalspecimensexamined(par/Viypes):MEXICO.Coahuila:municipiodeArteaga,nearsummit
ofCoahuiion.S\'-of.SaiiAnioniodel.asAlazanasandSFofSaltillo.3f20m,17Oct1989.P.M.Pctcr-
siui.J.W(/dcs-Rcv/Kifv/.A.V^i/lcin-((/8.5'J9{ANSM,US):29Aug1986,/.A.Mel)()iui/tilTi;XJ.NiievoLeon:
municipiodeGaleana,CerroelI'otosi.3600m,3Aug1989,A.Garcia-Arevalo66(ANSM,CllDlRj;
cumbredeCerroPorosi.ca.Galeana.29Aug1986,/A.M<:Donald(TEX);LaderaS,26Jul1985,J.A.
McDonald(THXJ;/.Ochoa-CuiUcnunil9S.iICOCA).
PETERSONETAL.,TWONEWSPECIESOFCALAMAGR0STI5FROMMEXICO 315
Calamagrostis divaricataP.M.Peterson&Soreng,sp.nov.(Figs. 2, 3).Type:
MEXICO.DURANGO.SierraMadreOccidental,ca.3miSofHwy40atMexiquillo,
ArroyoPasoResbaloso(23°42'46.2"N-105°39'45.1"W),2520m,14Sep2003,P.M.
Peterson,M.S.Gonzdkz-Elizondo&G.Tena-Gonzdlez17774CiiOLOTYri-:US!;
ISOTYPES:ANSM!,CHDIR!,MO!,RSA!,US!).
sApiCcaLihluivsa3v.,4m-s4t.3impymingllocnigiSsc.rgilbun,mies,\3i.i4e-al4.[3lmanmiculloinsgi-.'si,—\u0ncivmcnliast.is,Icrmammaitsirbelulsex3i.s8,-e4l.i3usmismellodnug'iasr.icaartiisst.a
iiLsertasu|iera1/4-1/3,recedil.
Looselycaespitoseperennialwithshortrhizomesandextravaginalshootini-
tiation.Cuhiis52-96cmtall,erecttoslightlydecumbentnearbase,glabrous;
internodesglabrous.Sheaths8-20cmlong,shorterorlongerthantheintern-
odes,glabrous;marginssmooth;cataphyllsandlowersheathsglabrous;sum-
mitglabrous.Ligules2-3.6m.mlong,membranousoltenlacerate,decurrent
below;apextruncate,ciliolate.Blades15-60cmlong,1-3mmwide,flatorinvo-
lute,apicallyacumitiate,glabrous,scabrousabove.Panicles9-16cmlong,4-10
cmwide,ovate,open,lax,sparselyflowered,greenish;rachisscaberulous;in-
florescencebranchesmostly2-8cmlongbelow,thebranchesdelicate,ascend-
ingandspreading,nakednearbase,whorled;lowerinflorescencenodeswith
3-6 branches.Spikelets3.4-4.3mm long,1-flowered,spreading from the
branches,yellowish-green;pedicels1-5mmlong,ascendingtoreflcxedand
spreading,scaberulous;rachilla1.6-1.9mmlong,coveredwithstiffhairs,the
hairsupto1.5mmlong.Glumes3.4-4.3mmlong,lanceolate,aboutequalin
length,shorterorlongerthanthelloret,membranous,l-vemed,scaberulous
alongvein;marginshyaline;apexacutetoacuminate.Lemmas3.8-4.3mmlong,
lanceolate,membranous,yellowish-green,5-veined,scaberulous,awned;apex
acute,entire;awn4-6mmlong,yellowish,borneontheupper1/3or1/4,straight
ortwistedandonce-geniculate;callusobtusewithshortwhitehairs,thehairs
0.2-1 mm long.Paleas3.8-4.4mm long,aslongorslightlylongerthanthe
lemma,hyaline,2-veined,theveinsscaberulous,green;apexacute,entire.Lodi-
cules0.7-0.8mmlong,lanceolate,lobed,glabrous.Stamens3;anthers1.8-2.2
mmlong,yellow.Ovary0.2-0.4mmlong,glabrous;styles2,separate;stigmas
2,feathery,whitish.Caryopses1.8-2.5tnmlong,fusiform,lightbrownish.
PhcMoIog3/.—FloweringinSeptetriber
Distribution.—Calamagrostisdivaricataisknownonlyfromthetypelo-
calitygrowingonmoistslopesandmossyclillswithPinuscooperiC.E.Blanco,
jRdurangensisMartinez,PfljyacahuiteC.Ehrenb.exSchltdl.,Quercussideroxyla
BonpL,ArbutusoccidenlalisMcVaugh&Rosatti,CupressusarizonicaGreene,
andMuhJenbcriiiaalaiuosacVasey.
DISCUSSION
Calamaii^rostiscoahuilcnsisremainedundetectedbybiologistsloralmost19
years.ThefirstcollectionsofthisspecieswereapparentlymadebyMcDonald
316 BRIT.ORG/SiDA21(1)
0.5mm
h<c3Xalamagrostisdivaricata{Peterson,Gonzdlez-Elizondo&Tena-Gonzdlez17774).LHabltZAnMiscence.C.Sh&ath,
ligule,andblade.D.Spikelet.E,Lowerglume,dorsalview.F.UpperGlume,dorsalview.G.Lemma.dorsalview.H.Lemma,
ventralview.I.Paleawithrachilla,dorsalview.J.Palea,dorsalview.K.Stamensandpistil.L.Gynoecium,mature.M.
Lodicules.
PETERSONETAL.JWONEWSPECIESOFCALAMAGROSTISFROMMEXICO 317
in1985fromtheCumbredeCerroPotosi.Allspecimensthatwehaveseenfrom
CoahuilaandNuevoLeonthatwerepreviouslydeterminedasC.purpurascens
orC.pringleiareC.coahidlensis.Therefore,C.purpurascensisnotfoundin
Mexico. Calamagrostis coahuilcnsis is morphologically similar to C.
purpurascens,butcanbeseparatedfromthelatterbyhavinganthersthatare
shorter(f-1.2mmlong),ligulesthatarenearlysmooth,ascaberulousrachis,
sheathsummitsthatareglabrousorminutelyantrorselyscabrous,andgreen-
ishpaniclesthataresomewhatdensebutnotspikelike(TableI).Populationsof
C.coahuiknsisareseparatediromtheclosestknownlocalityofC.purpurasccns
intheSangredeCristoMountains,TaosCounty,NewMexico(Allred1993)by
over800mi. McDonald(1990)andGarcia-ArevaloandGonzalez-Elizondo
(1991)firstreportedC.purpurascensfromCoahuilaandNuevoLeon,Mexico.
ApparentlyManuelGonzalez-Ledesma,JohnReeder,andCharlotteReederiden-
tifiedthegrassesforMcDonald(1990)sincetheyappearintheacknowledg-
mentsforhavingreviewedthatfamily.Thisisnotsurprisingsincemmostchar-
acteristics the rangeof variation in C.coahuilcnsisoverlapsthatof C.
purpurasccns.AnadequateillustrationiOchoa983)ofthenewspeciesappears
inBeetle's(f987)treatmentofthegrassesofMexico,althoughhereferredtoit
asC.pringlei.
ItissurprisingthatC.divaricataisknownonlyfromasingle,recentcol-
lection since it occurs near a rather heavily used tourist destination.
CalamagrostisdivaricataseemsmorphologicallyalliedtoCpringleiandcan
bedifferentiatedfromthelatterbyhavingwiderpanicles(4-10cm)with
mm
branchesreflexedspreadinganddivaricate,shorterspikelets(3.4-4.3 long),
shorterglumes(3.4-4.3mmlong)thatareboth1-veined,andshorterlemmas
(3.8-4.3mmlong)withanawninsertedonupper1/4to1/3(Table1.).
TheinfragenericclassificationofCalamagrostishasnotbeencritically
tested,anditisnotusuallydiscussedfortheNewWorld,otherthantheaccep-
tanceofthesegregategenusDeyeuxuibysomeSouthAmericantaxonomists
(RugolodeAgrasar 1978, 1998; Villavicencio1995).Thegenus(including
Deycuxia)isdividedintoatleastloursubgenerawithmanysections,subsec-
tions,andseries(Rozhevits&Shishkin1963;Tzvelcv1976;Wasiljew1960).All
oftheseRussianagrostologistsplacedC.purpurascensinCalamagrostissect.
Deyeuxia(ClarionexRBeauv)Rchb.,andWasiljew(whoseclassilicationwas
world-wideinscope)placedC.pringleiinthesamesection.Severalinfrageneric
taxawereacceptedfortheNewWorld(Sorengetal.2003).Basedoncallushair
length(1/2orlessthelemmalength),lemmasmembranous,andpresenceola
well-developedrachiUaextention,bothofthenewspeciesappeartobelongin
Calamagrostissubgen.Deyeuxiasect.IJeyeuxia.Akeylorseparatingthetwo
newspeciesfromotherspeciesolCahimagrosiisinnorthernMexico(Chihua-
hua,Coahuila,Durango,NuevoLeon,Sinaloa,andTamaulipas)lollows.
Table1.SalientfeaturescomparingCalamagrostiscoahuilensis,C.divaricata,Cpringlei,C.purpurascens,andCvalida.
Characters C.coahuilensis C.divaricata C.pringle C.purpurascens C.valida
Cataphylls&lowerleaf glabrous glabrous denselyhirtellous glabrousor glabrous
sheathabaxialsurface scaberulous
Leafsheathsummit glabrousorminutely glabrous glabrous glabrousorminutely Denselyhirtellous
abaxialsurface antrorselyscabrous retrorse-Strigulose
Leafblade&ligule glabrousornearly glabrous glabrous scabrous sparselyhirtellous
adaxialsurface smooth
Inflorescencewidth 0.5-1.2cm 4-lOcm 2-4cm 0.8-1,5cm (15-)4-10cm
Inflorescence ascendingand ascending, ascending,loosely ascendingand ascending,appressed
branches, closelyappressed; reflexedspreading appressedor closelyappressed, tobasespreading;±
arrangement& ifloriferoustobase todivaricate,not spreading;not spike-like; floriferoustobase
spikeletplacement floriferoustobase floriferoustobase +floriferoustobase
Spikeletlength 5.8-7.2mm 3.4-4,3mm (4.5-)5-5,8mm 5-9mm 4-6.5mm
Spikeletcolor greenish yellowish-green palegreentopurplish yellowish-purple yellowish-purple
rraacchhiillllaalhaeinrgtlhength 02,.54--13rmTmim 01..86--11..59mmmm 11.-52-2mmmm 11.-82-3mmmm 21-.53-2mmmm
Glumeslength 5.8-7.2mm 3.4-4.3mm (4.5-)5-5.8mm 5-9mm 3.4-6.5mm
Upperglume, one one three one (one)three
numberofveins
Lemmalength 5-5.7mm 3.8-4.3mm 4.5-5mm 4-7mm 3.4-5mm
Lemmasurface smooth scaberulous scaberulous scaberulous smooth
Lemmaveins,aspect conspicuous inconspicuous inconspicuous inconspicuous inconsp./conspicuous
Lemmatalawninsertion base,lower1/6 upper1/4to1/3 lower1/3tomiddle lower1/6to1/3 nearmiddle
Lemmaapex entireorbifid entire entire bifid twoorfoursetaeor
withage teeth(prolongation
Callushairlength 0.8-1.8mm 0.2-1mm 0.2-1mm 0.7-2mm, o1f.3v-e2i.n8s()-3.5)mm oso
occasionallyabsent o
Antherlength 1-1.2mm 1.8-2,2mm 2.2-2.4mm 1.5-3.5mm 1.4-2.2mm
Anthercolor purple yellow yellowish-purple purpleoryellow yelloworpurple :=
PETERSONETAL.JWONEWSPECIESOFCALAMAGROSTISFROMMEXICO 319
KEYTOTHESPECIESOFCALAMAGROSTISINNORTHERNMEXICO
1. oPranoinclelsow0e.r5-11/.65ctomnweiadre,lcoownetrra1c/4t;eda,ntdheenrssel1y-f1l.2owmermed;lolnegmmaawnCianlsaemrategdroatstbiassecoahuilensis
1. sPaenritceldesfro1.m5-l1o0wecrm1/3w,idmei,ddnlaer,raonwdtuopopperen1/a4;ndantlhoeorsesly1.f4-l2o.w4ermedm;lloenmgm.aawnin-
2. Lemmaapexwithtwoorfoursetaeorteeth(prolongationofveins);callu5hairs
1.3-2.8mmlong;rachillahairs2-3mmlong;leafblade,ligule,andsummitof
sheathsparselyhirtellous Calamagrostisvalida
2. hLaeirmsma0.a8p-e2xmenmtireloanngd;wlietahfoubtlasdeet,aeliogrutlee,etha;ncdallsuusmhamiirst0.o2f-1shmemathlonggl;arbacrhoiulsl.a
3. Upperglume3-veined;spikelets(4.5)5-5.8mmlong;lemmas4.5-5mmlong,
awninsertedonlower1/3tomiddle;panicles2-4cmwide,thebranches
looselyappressedorspreadingbutnotdivaricate Calamagrostispringlei
3. Upperglume1-veined;spikelets3,4-4,3mmlong;lemmas3.8-4.3mmlong,
awninsertedonupper1/3to1/4;panicles4-10cmwide,thebranchesre-
flexedspreading,divaricate Calamagrostisdivaricata
ACKNOWLEDGMENTS
WewishCOthanktheSmithsonianInstitutions,NationalMuseumoi Natural
History,BiodiversityandInventoryProgram,andResearchOpportunitiesFund
forsupportingtheiieldwork.AppreciationisextendedtoAliceR.Tangerinifor
providingtheillustrations;SusanJ.Penningtontorpreparingthedistribution
map;AlainTouwaideandDanNicolsonforcorrectingtheLatindiagnoses;Kelly
Allredand RichSpellenbergforcheckingthedistributionrecordsin New
Mexico;andTeresaMejia-Saulesforfindinginconsistenciesinthemanuscript.
REFERENCES
Allred,K.W.1993.AfieldguidetothegrassesofNewMexico.DepartnnentofAgricultural
Commur^ications,CollegeofAgricultureand HomeEcononnics,NewMexicoState
University,LasCruces.
Beetle,A.A.,E.ManrioueFgrceck.C.V.JaramilloLuque,MP,GuerreroS.anchez,J,A.MirandaSanchez,
CI.Nunl/Tancrldi,yCA.ChimalHernandez.1987.LasGrannineasdeMexico,TomoII.344
p.COTECOCA,S.A.R.H.,Mexico,D.R,Mexico,
ChimalHernandez,C.A,1987.CalamagrostisAdans.In;A.A.Beetle,E.ManriqueForcek.,C.V.
JaramilloLuque.,M.P.GuerreroSanchez.,J.A.MirandaSanchez.,C.I.NiiriezTancredi,y
C.A.ChimalHernandez.1987.LasGrannineasdeMexico,TotTioII,COTECOCA,S.A.R.H.
Mexico,D.RPp.161-172.
Clayton,W.D.andS.A.Renvoize.1986.Generagraminum:grassesoftheWorld.HerMajesty's
StationaryOffice,London.
Espejo-Serna,a.,A.R.L(')rez-Ferrari,andJ.Valdes-Reyna.2000.Poaceae.In:A.EspejoSernaand
A.R.Lopez-Ferrari,eds.LasMonocotylidoneasMexicanas:unasinopsisftoristica,Partes
IX-XI.Consejo Nacional de la Flora de Mexico,A.C,Universidad Autonoma
Metropolitana-lzapalapa,yComision Nacional paraelconocimientoyusode la
Biodiversidad,Mexico,D.RPp.10:7-236.
320 BRIT.0R6/SIDA21(1)
FiNOT,V.L.,P.M.Peterson,RJ.Sorinc,,andF.O.Zuioaga.2004.ArevisionofTrisetum,Peyritschia,
andSphenopholis(Poaceae:Pooidcac:Aveninae)inMexicoandCentralAmerica.Ann.
MissouriBot.Card.91:1-30.
Garcia-Arevah),A.andS.GoNZALfc/-ErizoNE)o.1991.FlorayvegetaciondelacimadelCerro
Potosi,NuevoLeon,Mexico.ActaBot.Mex.13:53-74.
Grfuter,W.J.M(NmiI,F.R.B.arrie,H.M.Biikihr,V.Demoulin,T.S.Filgueiras,D.H.Nicoison,PC.Silva,
J.E.Skog,PTrlhane,N.J.Turland,andD.L.H.AvvKSvvoRrEi.2000.Internationalcodeofbotani-
calnorTienclature(SaintLuisCode).KoeltzScientificBooks,Kdnigstein,Germany.
McDonald,J.A.1990.Thealpine-subaipinefloraofnortheasternMexico.Sida14:21-28.
McVaugh,R.1983.FloraNovo-Galiciana.Adescriptiveaccountofthevascularplantsof
westernMexico.Gramineae.14:1-436.UniversityofMichiganPress,AnnArbor.
RozHEviTS,R.Yu.andB.K.SHiSHKiN.1963(1934).FloraoftheU.S.S.R.vol.II,XXIV.GramineaeJuss.
NationalScienceFoundation,Washington,D.C.Pp.152-184.
RuGOLODEAgrasar,Z.E.1978.LasespeciespatagonicasdelgeneroDeyeuxiaClar.(Gramineae)
delaArgentinaydeChile.Darwiniana21:417-453.
RuGOLODEAgrasak,Z.E.]998.Deyeuxia.ln:S.A.Renvoize,GramineasdeBolivia.TheRoyal
BotanicGardens,Kew.Pp.181-235.
Soreng,R.J.,PM.Pii[RsoN,G.D,AviDSF,E.J.JuDZiEwicz,FO.Zi.iioaga,T.S.Filgueiras,and0.Morrone.
2003.CatalogueofNewWorldgrasses(Poaceae):IV:subfamilyPooideae.Contr.U.S.
Natl.Herb.48:1-730.
SoRENG,R.J.,G.Davidse,RM.Peterson,F.O.Zuloaga,E.J.Judziewicz,!S,FiLGUEiRAs,andO.Morrone.
2004.CatalogueofNewWorldgrasses(Poaceae).http://mobot.mobot.orgW3T/Search/
nwgc.htmlandClassificationofNewWorldGrasses.http://mobot.mobot.org/W3T/
Search/nwgclass.html
TzvELEv,N.N.1983(1976).GrassesoftheSovietUnion(ZlakiSSSR),partII.OxonianPress,
NewDelhi,India.
ViiiAViCENcio,X.1995,RevisiondergattungDeyeuxiainBolivien.1-304,Ph.D.Thesis,Freien
UniversitatBerlin,Berlin.
Wa5iljevv,W.N.1960.DassystemdergattungCalamagrostisRoth,FeddesRepert,63(31):
229-251.
Watson,L.andM.J.Dallwitz.1992.ThegrassgeneraoftheWorld.C.A.B.International,
Wallingford,U.K.