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Drosera graomogolensis (Droseraceae), a New Species from the
Campos Rupestres of MinasGerais, BrazilAuthor(s): Tnia Regina dos
Santos SilvaSource: Novon, Vol. 7, No. 1 (Spring, 1997), pp.
85-87
Published by: Missouri Botanical Garden PressStable URL:
http://www.jstor.org/stable/3392080 .
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DroseragraomogolensisDroseraceae),
NewSpeciesfromtheCamposRupestres f MinasGerais
BrazilTaniaReginadosSantosSilva
Departamentoe Botanica, nstitutode Biociencias,Universidade e
SaoPaulo,CaixaPostal11641, 05422-970, SaoPaulo,SP,Brazil
ABSTRACT. Droseragraomogolenszs . Silva sp.nov. is described
romthe region of Grao-Mogol,MinasGerais,Brazil.The species is
included nsectionDroseraand is related o D. villosa A.
St.Hilaire.The morphologicalharactershatdistin-guish it
fromotherspecies in the section aredis-cussed,togetherwithdetails
of habitat.
According o Silva (1994), the genusDroseranBrazilhas a
shortstem, 0.5-1.0 cm
(rarelyong);spatulateeaves(rarelyinear),withstipules
rarelywithout);wo to many lowersocatedon cymein-florescences;
gynoeciumwith3 or 5 carpels,with3 bipartite tyles nearlyto the base
or 5 wholestyles,and 5 or6 lobed, wo-lipped,
lavateorfim-briatestigmas.The fruitsare capsuleswith 3 or
5valves,containingnumerouseeds withreticulateorpapillose esta.In
the courseof floristic tudiesof the
Brazilian"camposrupestres"savanna-like egetation hatoccurs at
elevationsover 600 m in the Brazilianstates of Bahia,Goias,and
MinasGerais), ollec-tionsweremade n themunicipality fGrao-Mogol,in
the northern artof the mountainangeknownas the "Cadeia o
Espinha,co,"tateof MinasGer-ais. A studyof thespecies in
thegenusDroseraortheFlorula fGrao-Mogolonfirmed ne speciestobe
distinct romall otherknown peciesin the ge-nus in its vegetative
ndfloralcharacteristics.Drosera graomogolensis T.
Silva,sp.nov.TYPE:Brazil.MinasGerais:Grao-Mogol,orrego aBonitaon
the wayup to the Morro ambeiro,
7 Sep.1990, z R. S. Silvaet al. CFCR13506(holotype, PF;
sotype,RB). Figure1.Herba15.0-34.0 cm alta.Cauleselongati, .0-7.0
cmlongi.Foliarosulata, inacea,matura endentia,blonga,1.5-3.5 cm
longa,3.04.0 cm lata. Inforescentiae -2,vinaceae,14.0-31.0 cm
longae; lores10-16; pedunculi13.5-18.5cmlongi;ovaria -carpellaria,d
5.5 mm on-ga; styli3, ad 4.0 mm ongi,profunde -partiti;tigmata6,
2-3-lobata.Fructus apsularis, alvis 3;
seminaobo-voidea,reticulata.Herb,15.0-34.0 cm tall.
Stemselongate,3.0-
7.0 cm long.Leaveswine-red, preadingwithage,
forming rosette,oblong,1.93.5 cm long,3.0-6.0cmbroad,villouson
the upper /3 of the upper ur-face, the glandularentaclesradially
ymmetrical,glabrous n the lower /3, lowersurfacevillous,
hetrichomes ilamentous;tipulesrectangular,mem-branaceous, .04.0
mmlong, 1.S2.0 mmbroad,the laciniae 1.S2.5 mmlong.Inflorescences
or2, wine-red,14.0-31.0 cm long,
bearingglandulartrichomes,lowers10-16; peduncles13.5-18.5
cmlong;bractswine-red,inear, owersurfacespapil-lose
withglandularrichomes, aducous;pedicelswine-red,3.04.0 mm long;
sepalswine-red,4.0-6.0 mm long,unitednearthe base,
lowersurfacespapillose,withglandularrichomes,aciniae oval,ca. 4.5
mm long, 1.92.0 mmbroad,acuteat thetips;petalsunguiculate, .5 8.0
mm ong;stamensca. 4.0 mmlong,anthersca 1.5 mm long;gynoe-cium with
3 carpels,ca. 5.5 mm ong, styles 3, ca.4.0 mmlong,bipartitenearly o
the base; stigmas6, 2-3-lobed. Fruitswith 3 valves;seeds
obovoid,testareticulate.
Drosera raomogolensiss characterizedy theelongate tems, he
leavesthatspreadwithage, thelobedstigma,andthe obovoid eeds.The
presenceofspatulateeaveswithpetiolesnotdistinctrom
hebladedifferentiates . graomogolensisromD. in-termediaHayne,D.
cayennensisagotex Diels, D.communisA. St. Hilaire,D.
roraimaeKlotsch xDiels)Maguire& Laundon, . capillaris oiret,
ndD. brevifoliaursh,all ofwhichpossessevidentpet-ioles.Drosera
raminifoliaA. St. Hilairehaslinearleaves, and D. montanaA. St.
Hilairehas leavespressed lose to the ground, short tem,and
nflo-rescenceswith up to 8 flowers.Drosera essilifoliaA. St.
Hilairebelongs o sectionThelocalyx, hichis characterizedy
possessinga gynoeciumwith 5carpelsand5 styleswith
imbriatetigmas.Droseraraomogolensiss similar o D.villosaA.St.
Hilaire,but the latterhas shortstems,a bila-biate
stigma,andfusiformeeds(Fig. 2), whiletheleaves are pressedclose to
the ground.Droseragraomogolensiss placed n subgenusDrosera
ect.DroseraDiels,1906).
Drosera raomogolensiss found n sizablepop-NOVON : 85-87.
1997.
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SilvaDrosera graomogolensis from BrazilVolume 7, Number
1199787
Figure2. Micrographsf seeds (SEM).-A. D. graomogolensis.
Silva(Cavalcantit al. CFCR 510, SPF). B.D. villosaA. St. Hilaire
Lopes 4, SPF).
ulations n the municipality f Grao-Mogol,tateofMinasGerais; t
growson dampor dry sandysoils,betweenrocks, at the floodededges of
streams,oron open groundat greaterheights. It has beenfound n
flower ndfruit n the months f February,June, September, nd
November.
Paratypes. RAZIL.MinasGerais: Grao-Mogol,stra-da de
Grao-Mogol-Cristalia,5 Apr.1981, I. Cordeirotal. CFCR933
(PMA,SPF);16 km oeste da cidade, 17fev. 1968, H. S. Irwin t al.
23452 (UB),ago. 1960, Men-des Magalhaes18340 (UB);Jambeiro 7 km de
Grao-
Mogol,5 nov. 1985, 1: B. Cavalcanti et al. CFCR 8510(SPF);Alto
do Morro ambeiro,lancoda descidaparaoCorrego scurinha, sep. 1990,E
R. S. Silva et al. CFCR13478 (SPF).Literature itedDiels, L. 1906.
Drosera. In: A. Engler,Das Pflanzenreich4. 112: 61-128.Silva,T. R.
S. 1994. EstudosTaxonomicoseDroseraL.(Droseraceae)o
Brasil.Dissertacao e Mestrado.n-stitutode Biociencias,Universidade
e Sao Paulo,SaoPaulo.
