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Blumea63,2018:130–134www.ingentaconnect.com/content/nhn/blumea https://doi.org/10.3767/blumea.2018.63.02.07RESEARCH ARTICLE

INTRODUCTION

VanoverberghiaMerr.iscurrentlycomprisedofonlytwospeciesnamely V. sepulchreiMerr.fromthePhilippinesandV. sasa­kiana Funak.&H.OhashifromTaiwan(ZingiberaceaeResourceCentre2018).Thetypespeciesofthegenus,V. sepulchrei, is known to be restricted within Northern Luzon to the provinces of MountainProvince(typelocality),Benguet,andIfugao(Funa-koshi&Ohashi2000).Herbariumspecimensandphotographspostedonline(e.g.,Co’sDigitalFloraofthePhilippines:www.philippineplants.org),however,documentthatV. sepulchrei also occursintheprovincesofAntique,Capiz,Quezon,NegrosOc-cidental,Rizal,andSorsogon.RecentexaminationofherbariummaterialandphotographsidentifiedasV. sepulchrei revealed that populations from the latter provinces and some populations fromIfugaoandMountainProvincemayrepresentaseparatetaxon.Toinvestigatefurtherwhetherthesepopulationsaredis-tinct from V. sepulchrei, new vegetative and flowering material wascollectedfromsomeoftheabovementionedprovinces.After comparing these to the protologue of V. sepulchrei and specimensincludingtypes,thisstudyconfirmsthepresenceofaseparatespecieswhichisdescribedandillustratedbelow.Specimensseenonlyasdigital imageavailableonline(e.g.,plants.jstor.org)aredenotedwithanasterisk(*).Forthecon-servationstatusofthenewspecies,theextentofoccurrence(EOO)andareaofoccupancy(AOO)werecalculatedusingtheGeospatial ConservationAssessment Tool (GeoCAT)(Bachman et al. 2011; http://.geocat.kew.org).These datawere then compiled to determine the conservation status of the newspeciesusingtheInternationalUnionforConservationofNature(IUCN)criteria(IUCN2016).Theassessmentisunderreviewandwillbeavailableathttp://www.iucnredlist.org/afterApril2019.Akeytothespeciesaswellasadistributionmapof Vanoverberghiaareprovided.

TAXONOMIC TREATMENT

Key to Vanoverberghia species1.Pseudostem2–3mlong;peduncleyellowishgreen;apices

oflabellumlobesbifid;maturefruitsmid-green.—Taiwan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V. sasakiana

1.Pseudostem4–8mlong;pedunclered;apicesoflabellumlobesentire;maturefruitsdeepred.—Philippines . . . . . 2

2. Laminaoblong;liguleapexrounded;bractspubescentandpinkishwhite;calyxpinkishwhite;corolla tubeand lobeswhite;stylewithspots . . . . . . . . . . . . . . . . . . V. sepulchrei

2. Lamina oblong to narrowly elliptic; ligule apex unevenlytruncate;bractsglabrousandred;calyx red;corolla tubeandlobeswhitetopink;stylespotless. . V. rubrobracteata

Vanoverberghia rubrobracteataDocot&Ambida,sp. nov.—Fig.1–3;Map1

Similar toVanoverberghia sepulchreiMerr.butdiffers in theshapeof thelamina(oblongtonarrowlyellipticnotoblongonly),shapeoftheliguleapex(unevenlytruncatenotrounded),surfaceandcolourofthefloralbracts(gla-brousandrednotpubescentandwhite),colourofthecalyx(rednotpinkishwhite),colourofthecorollatubeandlobes(whiteorpinknotwhiteonly),andabsenceofspotsonthestyle.—Type:R.V.A. Docot 0123(holoPNHno.256337;isoE,NY,SING,USTH),Philippines,Luzon,Quezon,Tayabas,BarangayLalo,MountBanahaw,N14°03.561'E121°31.157', 1432m,12Nov.2017.

Etymology.Thespecificepithetreferstotheredfloralbracts.

Terrestrialherbinlooseordenseclump.Rhizome25–50mmacross,red,stronglyaromaticwhencut,scalesthick,brown.Leafy shoot arching at various degrees, pseudostem4–6mlong,basebulbous,3–5cmacross, red;sheaths glabrous, green;liguleovate,20–30mmlong,coriaceous,glabrous,red,apexunevenlytruncateandentire;petioleterete,10–13mmlong;laminaoblongtonarrowlyelliptic,50–51by11–15cm,veins obscure, dark green above, lighter beneath, glabrous on bothsides,baserounded,marginentire,apexcaudatewitha20–30mmlongflagellatetip.Inflorescence a terminal raceme, pendulous,25–35cmlong;peduncleterete,10–20cmlong,glabrous,deepred,subtendedby2–3persistentbracts;rachis 7–15 cm long, glabrous, deep red;pedicel terete, 3–5mm

A new species of Vanoverberghia (Zingiberaceae) from the PhilippinesJ.H.B.Ambida1,A.M.A.Alviar1,P.S.A.Co1,F.G.M.Concepcion1, C.I.Banag1,2,R.V.A.Docot3

1 DepartmentofBiologicalSciences,CollegeofScience,UniversityofSantoTomas,EspañaBoulevard,Sampaloc1008,Manila,Philippines.

2 ResearchCenterfortheNaturalandAppliedSciences,ThomasAquinasResearchCenter,UniversityofSantoTomas,EspañaBoulevard,Sampaloc1008,Manila,Philippines.

3 Department of Biological Sciences, Institute ofArt andSciences, FarEasternUniversity,NicanorReyesSr.Street,Sampaloc1015,Manila,Philippines;correspondingauthore-mail:dukerudolph@gmail.com.

Key words

least concernnew speciesPhilippinesVanoverberghiaZingiberaceae

AbstractAnewspeciesfromthePhilippines,Vanoverberghia rubrobracteata,isdescribedandillustratedhere.ThenewspeciesismostsimilartoVanoverberghia sepulchrei from which it differs in its leaves with oblong to nar-rowlyellipticlamina,unevenlytruncateliguleapex,glabrousandredfloralbracts,redcalyx,whiteorpinkcorollatubeandlobes,andabsenceofspotsonthestyle.

Published on5September2018

131J.H.B.Ambidaetal.:AnewspeciesofVanoverberghiafromthePhilippines

Fig. 1 Vanoverberghia rubrobracteataDocot&Ambida.a.Habit;b.ligule;c.inflorescence;d.leafapex;e.floweratanthesis;f.maturefruit;g.flower(allfromtypelocality).—Scalebars=1cm.—PhotosbyR.V.A.Docot.Abbreviations:an:anther;br:bracts;ca:calyx;dc:dorsalcorollalobes;fl:flower;lc:lateralcorollalobes;la:labellum;nc:nectaries(epigynousglands);ov:ovary;pe:pedicel;sg:stigma.

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cabr dcfl anlc la pe

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132 Blumea–Volume63/2,2018

cb da g he f

Fig. 2 Vanoverberghia rubrobracteataDocot&Ambida.a.Floralbract;b.calyx;c.dorsalcorollalobe;d.lateralcorollalobes;e.labellum;f.filamentandlateralstaminodes;g.anther(frontview),noticealsothestyleandstigma;h.anther(backview).—Scalebars=1cm.—DrawingbyG.Campos.

Map 1DistributionofVanoverberghia rubrobracteata Docot&Ambida(),V. sasakianaFunak.&H.Ohashi(◆)andV. sepulchreiMerr.(■).

long,slightlypuberulous,red;floral bract spathaceous, tubular at thebase, glabrous, 35–40by5–10mmwhen flattened,red,apexpubescent;bracteoleabsent;flower budscylindric;flowerscongestedalongtherachis,oneperfloralbract;calyx funnel-shaped, 15–18mm long, glabrous, coriaceous, red,apex3-dentate;corolla tube10–15mmlong,glabrous,coria-ceous,whiteorpink;dorsal corolla lobelinear-oblong,55–60by6–8mm,glabrous,whitetopink,apexroundedandcucul-late; lateral corolla lobes linear-oblong,55–60by3–5mm,glabrous,whiteorpink,apexroundedandcucullate;labellum

connatetothebaseoflateralcorollalobes,freepartbifid,thelobessubulate,30–40by3–5mm,white,basepubescent,apices of lobesentire; lateral staminodes filiform, 2–3mmlong,slightlypubescent,white;stamen68–71mmlong,curvedatanthesis; filament canaliculate and enclosing the style for almosthalfitslengthabovethelabellum,53–55by2–3mm,slightlyglandular,cream-white;antheroblong,15–16by2–3mm,sericeous,crestless,thecaepubescent;style4–6cmlong,glabrous,white;stigmacupular,1–2mmwide,white,ostioleelliptic,marginhispid;epigynous glands compressed, subglo-bose,1.5–2mm long;ovary subglobose,4–7by2–3mm,coriaceous,glabrous,deepred.Fruit ellipsoid to subglobose, 20–25by15–20mm,coriaceous,glabrous,deepredwhenmature,calyxpersistent.Seedsubglobose,1–2mmacross,brownwithwhitearil. Vernacularnames—Akbab(Igorotlanguage),Bagombong(Tagalog),andTagbak(Bisaya). Uses—Thefruitsareeatenbythelocalsandwerereportedto have a sweet and sour flavour like V. sepulchrei (Docotetal.2016). Phenology—Flowering: betweenOctober and January;fruiting:betweenFebruaryandMay. Distribution&Habitat—Vanoverberghia rubrobracteata isendemictothePhilippinesandoccursintheprovincesofAntique,Capiz, Ifugao,Quezon,MountainProvince,NegrosOccidental,Rizal,andSorsogon(Map1).Itinhabitsmontaneforestsalongstreamsandravinesfrom1000–1600m. Conservation status — Vanoverberghia rubrobracteata is abundant within the montane forest of the eight localities, three ofwhichareprotectedareas in thePhilippines (e.g.,MountBanahaw-SanCristobalProtectedLandscape).Thepopulationofthespecies,however,maydeclineifexpansionofagricultural(e.g.,vegetableplantations)andresidentialareaswithin theforestsofeach locality iscontinuouslypracticed.Therefore, V. rubrobracteata is preliminary assessed here under the Least Concern(LC)category.

Additional specimens examined. Vanoverberghia rubrobracteata.PhiliPPines,Luzon,*A. Loher 7028(K),Rizal,1906;*A.D.E. Elmer 17095 (BO,P,S,US),Sorsogon,Irosin,MountBulusan,Aug.1916;*A.D.E. Elmer 17383 (BO,P,US),Sorsogon, Irosin,MountBulusan,Sept.1916; D.N. Tandang & R.T. Angeles s.n. (PNH),Ifugao,Banaue,22Jan.2013;R.V.A. Docot 0049 (USTH [2sheets] incl. spirit),Quezon,Tayabas,BarangayLalo,MountBanahaw,25Apr.2016.–Visayas,*M. Ramos & G. Edaño 30734(BO,P),Capiz,MountMadjaas,Apr.–May1918;R.V.A. Docot 0118 (NY,USTHincl.spirit),Antique,Culasi,BarangayFlores,MountMadjaas,17Oct.2017.

133J.H.B.Ambidaetal.:AnewspeciesofVanoverberghiafromthePhilippines

Fig. 3 Vanoverberghia rubrobracteataDocot&Ambida.a.MountainProvince;b.Ifugao;c.NegrosOccidental;d.Antique(a,c:withoutvoucher;b:D.N. Tandang &R.T. Angeles s.n.;d:R.V.A. Docot 0118).—Photosby:a.H.Funakoshi;b.D.N.Tandang;c.P.B.Pelser;d.R.V.A.Docot.

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d

a

134 Blumea–Volume63/2,2018

Vanoverberghia sepulchrei.PhiliPPines, Luzon, P.T. Barnes 947(SING),Benguet,Baguio,May–June1904;*A.D.E. Elmer 8560 (BO,SING,US),Benguet,Baguio,Mar. 1907; *M. Vanoverbergh 956 (BM,US),Bontoc,MountainProvince,19Oct.1910;*M. Ramos & G. Edaño 45045(BO,P,SING),Benguet,Baguio,Mar. 1925; H.C. Conklin & Buwaya I­984 (L [2sheets],PNH),Bayninan,Banaue,Ifugao,6Mar.1963;R.V.A. Docot 0001 (USTH[2sheets]),N17°03.293'E120°57.372',MountData,BarangayAlab-Oriente,Bontoc,MountainProvince,1Nov.2013;R.V.A. Docot 0027 (USTH![3sheets]incl.spirit),MountData,BarangayAlab-Oriente,Bontoc,MountainProvince,9Jan.2016;R.V.A. Docot 0122 (PNH,USTHincl.spirit),MountData,BarangayAlab-Oriente,Bontoc,MountainProvince,5Nov.2017.–CultivatedmaterialfromLyonArboretum,Honolulu,Hawaii:*Anon L­87.0651 (E[4sheets],US)1995;*J. Mood 46(E),15June1998;*J. Mood 47(E),16July1995.

Notes — Vanoverberghia rubrobracteata and V. sepulchrei bothoccurintheprovincesofIfugaoandMountainProvince.Thepopulationofthenewspeciesinthesetwoprovinceswhichare located more northerly, however, are quite distinct from the populations distributed more southerly by having pink corolla tubeandlobes(vswhite)(Fig.3a,b).Sinceonlythecolourofthe corolla tube and lobes was found to be different, this study cannotwarrant the populations from Ifugao andMountainProvincetoberecognizedasaseparatespeciesnoravariety.

AcknowledgementsWethankthecuratorandstaffofL,NY,andPNHforlettingusexaminespecimensintheircare;H.FunakoshiandD.N.TandangofPNHforthephotographsandadvice;P.B.PelserwithfinancialsupportfromthePhilippineBiodiversityConservationFoundation,Inc.(PBCFI)fortheNegrosOccidentalphotograph;S.G.S.Zamudio,J.A.D.Ordas,J.E.C.Olivar,andW.Cabanillasforthehelpduringfieldworks;DepartmentofEnvi-ronmentandNaturalResources(DENR)especiallyDENRCARwithPENROMountainProvinceandDENRRegion IV-AwithPENROQuezon for thecollectionpermits;G.Camposforthedrawings;A.N.Piliforthedistributionmap;BarangayLalo(Tayabas,Quezon),P.S.BangcayaoftheUniversityofAntique(TarioLimRuizCampus),andO.B.Lopezforthehospitalityduringfieldworks;NagaoNaturalEnvironmentFoundationandPhilippineCommis-siononHigherEducation(CHED)fortheresearchgrantstoC.I.B.;DOSTASTHRDP-NSCfortheresearchgranttoR.V.A.D.;ResearchCenterfortheNaturalandAppliedSciences(RCNAS);andtotheThomasianAngiospermPhylogenyandBarcodingGroup(TAPBG)oftheUniversityofSantoTomas.

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