Notes on Inflorescence Structure of Boesenbergia (Zingiberaceae)

2006·0.8 MB·English

by  Sakai, Shoko

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ISSN 1346-7565 Acta Phytotax .Geobot .57 (1) 1:07' -111 (2006)
Short Communication

Notes InfloreseencSetructureofBoesenbergia(Zingiberaceae)
on
SHOKO SAKAIi*and HIDETOSHI NAGAMASU2

JCenterfor Ecologieat Research, 19,oto Universi4) lOtsu 52e-2113, Jtipan; 2Tlie kyot oUitiversit M.iviseum, IZlyoto
Universin S.a;kyo ,1<),o t6o06-8501 ,,1apan,
One-side dspiral arrangement of bract sis describe din detai wlith comparison of distichou osnc in
Boesenbeigi a(Zingibcrace aAses)o,ciation among inflorescence structure, anther dehiscence pat-
terns, and geographi cdistribut iaoren discussed.
Key words: Zingiberoidea ienifiorescen scteructure; distichou osn;e-sided spiral arrangement; Borneo
Boesenbeilgi aO, Kuntze is a relativcly larg egenus arrangement was fir sretported by Cowley ( 1988) for
in the Zingiberace aceurrently includin gabout 80 B. hruneian aCowley. She referred to the arrange-
species. Recent publication sdescribi nmgany new ment only briefl aMnd believe idt to be unique to the
species (Smit 1h987, Poulsen 1993, Larsen 1993, spccies. Thc featur ies not uncommon in the genus,
1997, Cowley 1998, 2000, Saensouk & Larsen however, especially in Borneo. In this paper ,we
2001 , Sakai & Nagamasu 2006) indicat ethat others report on the association between inflorescence
are yet to be describe dB.oesenbefi: ghiaas been structure, anther dehisccn cpeattems and gcographic
regarded as a well-defincd genus characterized by distribut oifo 2n6 species of Boesenbergia .Addition-
the two-ranked (distich oarurasng)ement of the ally, the phylogenetic significance ofthese charac-
bract sand an infloresce nicne which fiower sopen ters is discussed.
from the apex to the base (deternii Wniathtien )t,he
family t,hese characteristic are known only in the Tw'o type sof infiorescences
closely related Hdplochoretna and probabl yin the The two-ranked arrangement of bracts in Boesen-
more distant lreylated Caulokaen\lfle rBioae,sen- bergi ais commonly referred as disticho ubsu,t is not
bergi adifTe rfsrom those two genera in it sconcave strictly so since the bract soverlap on one fac eofthe
labellu mand small anther crest (Lars e&n Smith axis but not on the other (Smit h1987). In most of
1972, Smith 1987). the disticho usspecies, the long infiorescenc eis
During studies on the Zingiberaceae in the exerted from the leaf sheath and the two-ranked
LambirHills,Borneo(Saka&iNagamasu 1998, is Theflowers from
arrangement visible. open apex
2006), however, we fbund that in many species of to base ,and alternately from right to lef t(Fig s1A.,
Boesenbergi athc bract swere arranged spirally on 2A). TWo vertical rows can bc casily recognized, as
only one side of the inflorescen acxeis. Such an shown by the thin line son the rachis ofthe inflo-
' Correspondin gauthor, E-mail: [email protected] .jp
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TABLE1 , List of species in which inflorescen csteructure was exarnined, Anther dehiscenc epattern asrc classificd int oslit (aiit thhee-r
cac dehiscin gthroughtout length) s,hert slit (thec daeehiscin gby slits much shorter than thecae )and pore (dehisc biyn pgores),
Spccies I]fierescenceAntherdehiscence*Ma etxeamriineadl
Indochina
B. acuminata P.Sirirugsa Distichous SlitSfPoreSlsiutiSmliiztu Setl ialt, s7r9S1l7i t(sKrYSOli, thsorlSol.i)tsrSlitSTSIitSlitsrSlit
B. curtisii (Bak .S)chltr, One-sided S)himiz eut aL S032 (KYO)
B, longijlor (aWiil Klu.nt)ze Distichous funaha et aL 23015 (Tt)
B. Iongipe s(Kin g& Prain) Schltr. Distichous Mcxxwet l75- 79 7 (AAU)
B. (SNla1B1a.k.)Kuntze Disticheus Sbnensen 3639(AAU)
pamula ex et al.
B. petiolat aP,Sirirugsa Distichous MLLxweli 74-631 (AAU, iso.)
B. plicar aHolt. Distichous Cha,weuphol et aL 3638, 3691 (AAU)
B, prainianer (Kin gex. Bak,) Schltr.Distichous Charoeuphol et al, 3987 (AAU)
B. puicherrima (Wall K.u)ntzc Distlchous Kbrr Vl07 (C)
B. ,vtunda (L. M)ansfl One-sided iimweV 76-57P (AAU) ;Latsen J0540 (AAU)
B, tenuispicata K.Larse" Distichous Larsen et aL 43446 (AAU, hDlo,)
B, trangensis K.Larsen Distichous La,wen 44000 (AAU, holo.)
BorneoB,
burttianaR.M.Sm. One-sidcd s]{tPorePoreBPuorrtet8V3S2I5it{SEml,hPoelroe.C)2Short

B.hurneianaJ.Cowley One-gidedCi Dransteld1136(K,holo,)

B, S.Sakai& Nagam. One-sidcd SZikoi399(KYO,type);IVtigamasu672S(KYO)
.flabellata
B. grandijbli (aVla 1Me.r)r, One-sided Nl'euwenhui s939 (BO ,lectotype)
B. grandis R.M.Sm. One-sided A,gent & Kkrby 794 (E ,holo.)
B,hosensiJs.Cowley One-sided Cowfep5s5(E,holo.)

B, ischynosipho nS.Sakai & Nagam. One-sided slit 5tiha i79, 81 (KYO)
B.IambiJ'ensiSs.Sakai& Nagam. One-sided PerePoreSlit5PZeirheai174(KYO,holo.)

B,lyschitoSd.iSaeksai& Nagam, One-sided-**One-sided Sahai414(KYO,holo.)

B, orbiculata R.M.Sm. Rmtsen 257(AAU)
B, parva (Ridle yM)err. Burtt & Martin 4706 (E) ,Burtt & PVhod vB2489 (E),
Sbuhai409(KYO),IVtigamasu6733(KYO)

B. pulchelta (Ridle Mye)rr. Distiehous SlitPeuruusSRmi2dky s.n. (K, type); k)kaw'a & Hotta 563 (KYO)
B, stenoph.vlla R.M.Sm. Onc-sidcd Burtt & PPbods B2219 (E)
B, un eoligena A,D.Poulsen One-sided Short slit' R:}ztlse n25I (AAU, holo.)
B. R.M,Sm. One-sided Slit HlrnseJn13(C,holo.)
variagata
' Superscrip tisndieat ethat descriptio nosf the character states are based en the followin gliteratu rCel;: Cowley (1998 )C2;:
Cowley (2000P):;Poulsen(1993S)m;l: Smith(1987)Sm;2:Smith(1979)Sr;:Sirirugs(a1992V)/;Vhletom(191g).

** Inflorescen csetructure of B. orbiculata could bot be deterrnine ddue to small nurnbers of flower son an inflorescence.
rescence (lar gtreiangle )in Fig .1A , cence with spirally arranged bract swere split ver-
In contrast, other species of Boesenbergia have ticall yinto two. The flower sagain open strictly
infiorescen cweitsh bract sarranged on one side. from the apex to the base ,irrespect iovfe which
This type ofinflerescence is often short, congested, row the brac tis in (Fig sIB., C). Figs .IB and IC
and concealed within the leaf sheath. The bracts illustra tthee overlapping side ofthe infiorescence.
everlqp on one side but not on thc othen The view of The thi nline isn the larg etriangl iendica theorizontal
the non-overlapping side easily causes misunder- rows of flower s(circl ewhsic)h, are part sof the
standing that the bract sare arranged distichously,spiral,
because only the two bract sat the end of each hor-
izonta rlow are visible (Fi g2B,), On the other side, Distributi oonf the two infiorescence types
howeveg the bract soyerlap considerably (Fi g2,C). We Qbserved the infioresce nacrreangement of 26
The bract asre arranged as if a fusifbr minflores-species ofBoesenbergia firQm Indoch{na (Thailand,
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B
FTG. 1. Diagrams showing arrangement of fiowers in infioresccnces ofBoesenbergia, Circle sindicat felower locatio onn rachis ofinfio-
rcscence; inflerescen ciendicate bdy open triangle .(A) Distichou fslower sin two venical rews shown by thi nline sN.umbers rep-
resent order offiowering within infiorescen c(eB. ,C) Arrangement offlowers en B, y7Libel l(aotnae-si sdpieradl, imbricate b)ased
on spirit material (IVZvga m6a72sSu - KYO). Numbers represent erder of fioweri nesgtimated by size {}f fiowe bruds, Circle swith
cross are aborted fiowers s,hadcd circles indicat felowering T.hin tine sundcr flower sshow horizonta r}ows ofspiral arrangement.
(C) diagram of infiorescen csehown in Figs .2B and C.
Burma) and Borneo (Malays Birau,nei) S.ince it is pores ,Hcre we categorize anther dehiscenc epatterns
diMcult to elucidate the spiral arrangement, espe- into slits (anth tehercae dehiscing throughout their
cially in drie dmaterials, we distinguis htewdo types length )s,hort slits (thec daeehiscin bgy slits much
ofbract arrangement: 1) disticho aunsd ,2) denscly shorter than thecae) and pores (dehisc biyn pgores),
imbricat aend verticillate .In the tbrmer type, the Based on our observations, 1 1 ofthe 26 species
fiower sare arranged in two venical rows (Fi gI.A), we examined have disticho uisnfiorescenc wehisl,e
while in the latte rm,ore than two flower sare 15 have an imbricate inflorescenc eI,nterestingly,
arranged almost verticillate in the basa lpart of the most species ofBoesenbergia from Indochina have
infiorescen bcuet, only on one side, and two vertical a disticho uisnflorescen cwhei,le most species in
rows cannot be clearly recognized. Borneo have an imbricate infiorescenc e(Tabl 1e).
We also examined the correlation between Additionall yon,e-sided species includ eboth slit
inflorescen scteructure and anther dehiscenc peat- and pore type anther dehiscenc eb,ut only slit type
terns. Vlariatio inn anther dehiscenc heas been rec- dehiscenc eis known in the disticho uspsecies. The
ognized since Valeto n(1918 T)h,c thecae of some correlation suggests that brac tarrangement is an
species open by terminal pores b,ut in others the the- important character in the intragener icclassification
cae dehisce throughout their length T.he pores are ofBoesenbergia and fbr considering the taxonomic
not true pores in most species, becaus eslits usually limi tQf the genus.
run downward from the pores on the inne rface of Recent molecular studies have questioned the
each theca (Smit 1h987). RarelM the anthers dehisce monophyly of Boesenbergia. Kress et al. (2002)
by slits about half the lengt hof the thecae, This studied the phylogeny ofthe entirc family and rec-
may be an intermedia ctoendition between slit sand ognized two clades in Boesenhergia; one with B,
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Fia 2 Photegraph sofmfloresLenccs with dLsuchou s(A) and enc sided spLral aiTangement effio-ers (B ,C), bars = 2 cm (A) Boesen
bergia pulcheila ,herbarium sheet (Kokawa & Hbtta 563 KYO) (B ,C) B faibeUa tspant, material (IVdgama 6b7u28
KYO)
pulchell"im arwal )l Iimntz acnd B longmb,u (Wal )l We are gratefu t1o the curators of AAU, BO, C, E, K
Kuntze (= C=uKumoizpha tongij7b (FuWal )l A S Rao and TI who kindl ypermitte dus to examme herbarium
& D M Verma), and the other with B rotunda (L ) spccimens This study is partl syupported by grant sfrom
Mfaonrsmfe r Atlwlo t hsrpeeec sipeesci ehsa sa rdei fsrtomi cInhd ooiuncfslhomreasc,e nacne,d the tTRheeecs hcJnaaorplocaghnIyenss e(uM#tiu1nt4ifes5ot4rHr0 uy6omf4a 3 Cn#,ui1lt6ty4u05r0e 0,S6Np)a,otru trPsc r,(ScucPei2ce2t n)oc,te atnhde
and and a
the latter has an imbricate infiorescence Grant for the Biodiversi tRyesearch of the 21 st Century
Ngamriabsakul et at <2004 a)lso reported two COE (Al4) J,apan
clades, one with B basispicat aK Larsen ex
Smrugsa, B gelatinosa K Larsen ,B longij7ora References
and B aff longijlo raand, the other with B auTan-
tiaca RM Sm and B corrlata RM Sm All four Cowley, J 1988 Two new species of BoesenbeTgia
species m the former group are from Indochma, (Zmgibcrac fcraocm )Brunei Darussalam Kew Bull
53 623-629
and both ofthe latte grroup are fi:o mBorneo [Ib 2 000 Threc ncw gmgcrs from Bornco Kew Bull
determme if the two types of mfiorescence found in 55 669-678
thi sstudy correspond consistently to the two possi- Kresb,W J,L M Prince &K J WiUiams 2e02 The
ble phylogenetic groups, and to determme the tax- phylogeny and clasgification of the gmgers (Zin-
onomy of the two groups, furthe rstudies on the gibcracca e)eyidence from molecular data Am J
Bot 89 1682-1696
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beigi ausing larg esamples from differe nrctgions Larsen ,K 1993 BoesenbetrrgoimaT hteaniuilsapnicdNaioard (ZJiBnogtilb3era-
ceae) a new species
and other reldted gencra are essential 281 283
1997 Further the Boegenbergia
studies in genug
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April 2006 SAKAJ & NAGAMASU: Inflorescence ofBoesenbeigia 111
(Zingibera cNeorade. )J.. Bot 17: 36i-366, Sakai, S. & H. Nagamasu. 1998. Systemati cstudies of
& R. M, Smith .1972, Notes on CatdokoemptZiria. Bornean Zingiberace aIe ,Amomum in Lambir IIills,
NotesRoy.Bot.Gard.Edinburgh32:287-295. Sarawak.EdinburghJ.Bot.55:45-65.

Ngamriabsakul C,., M. Newman & Q. C. B. Cronk .2004. & , 2006, Systemati cstudies of Bornean
The phylogeny of tribe Zingiberace abeased on ITS Zingiberaceae V. Zingiberoideae of Lambir Hills,
(nrDNA a)nd tmL-F (cpDNA s)equences. Edmburgh Sarawak. Blumea 51 (i npress).
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Poulsen ,A. D. 1993. TWo new species ofBoesenbergia II I(Hedychie Naoet)e.s Roy. Bot, Gard, Edinburgh
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294, Sirimgsa,P.I992.A Boesenbergia
revisien ofthe genus
Saensouk,S.& K.Larsen.2001.Boesenbergiabaimaii, Kuntze(ZingiberaicneTahaei)landN,at.Hist.Bull,

a new species ofZingiberaceae from Thailand. Nord. Siam Soc. 40: 67-90.
J. Bot. 21: 595-597.
Recelved Sleptembe 2r9, 2005; accepted October 3i, 2005
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