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VIII. Descriptions of Three New Genera of Plants jf the Malayan Herbarium of the late 
. A. C. MarsGAvy. By Prof. OLIVÉR, F.R.S., F.L.S., jc. 
(Plates XLII.-X LIV.) 
d Read April 18th, 1872. 
PTELEOCARPA, Oliv. 
Olacinearum genus novum. 
Flores hermaphroditi. Calyx 5-partitus, lobis imbricatis, fructifer immutatus. Petala 5 in corollam 
profunde 5-fidam connata, lobis patentibus zestivatione imbricatis. Stamina 5, coroll: tubo inserta, 
ejusdem lobis alterna, filamentis filiformibus, antheris linearibus v. lineari-lanceolatis basifixis. 
Ovarium liberum 2-loculare compressum glabrum, basi in discum subæquilatum elevatum continuum ; 
styli 2 subæquales erecti ; stigmata terminalia compressiuscula oblique subspathulata aut vix dilatata ; 
ovula in quoque loculo solitaria pendula anatropa, raphe laterali v. subventrali. Fructus compressus 
samaroideus orbicularis, ambitu late alatus, alis radiatim nervosis, apice bifidus, centro vix turgidus, 
2-locularis. Semina in loculis solitaria pendula elongata compressa, basi angustata, raphe lateraliter 
notata, albuminosa ; albumine uniformi, embryo dimidio brevior; radicula supera cylindrica v. sub- 
clavata; cotyledones lineari-lanceolate obtusiusculz radicula longiores. 
Arbor glabra. Folia alterna simplicia oblongo- v. oblanceolato-elliptica integra petiolata exstipulata. 
bue Inflorescentia terminalis paniculata multiflora. Flores pedicellati, flavi v. coccinei. 
P. MALACCENSIS, Oliv., sp. unica. Glaberrima. Ramuli teretes. Folia breviter et ob- 
tusiuscule acuminata, basi in petiolum angustata, membranacea v. tenuiter coriacea, 
subtus nervo medio subprominente percursa, nervulis secundariis subdistantibus mar- 
ginem versus evanescentibus ; lamina 3-5 poll. longa, 13-2 poll. lata; petiolus gracilis 
3-2 poll longus. Paniculæ terminales tempore florifero folia paulo aut vix supe- 
rantes, ramulis adscendentibus compressiusculis minute puberulis, bracteis minutis 
ovato-deltoideis acutis 35-3); lin. longis ; pedicelli graciles nonnunquam in cymulas 
umbelliformes aggregati, +-4 poll. longi. Flores flavi v. coccinei glabri 3 poll. 
diametro. uy 5-partitus, lobis sul libus ovato-rotundatis obtusis, æstivatione 
imbricatis. Corolla calyce 4-plo longior, gamopetala, tubo brevi, limbo 5-partito 
æquali, lobis oblanceolato-oblongis obtusis. Stamina 5, corollam subæquantia, 
ejusdem sinubus inserta; filamenta filiformia glabra; antheræ basifixæ lineares 
v. lineari-lanceolatze, basi 2-lobatze, 2-loculares, longitudinaliter dehiscentes. Ovarium 
liberum glabrum compressum 2-loculare obscure longitudinaliter suleatum, in 
disco elevato æquilato et subæquilongo insertum, apice in stylos angustatum. Ovula 
in loculis solitaria anatropa pendula. Fructus erectus orbicularis samaroideus 
compressus 2-locularis, ambitu late alatus, apice emarginatus, 11-13 poll. diam., alis 
integris 3-3 poll. latis, radiatim nervosis. Semina in loculis solitaria pendula 
VOL. XXVIII. . 4 A 
