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WUUU,TSNOru

SilO0ff NO

286 STUDIES ONMONSTERBAE (ARACEAE) OFBORNEO I

glaucous,

adaia)ly m^tte olive

green

(in striking

contrast

to

all

other

Sarawak species

in which leaf

laminae

^te

^{adzxtzlly glossy}

medium

to

dark green,

while

abanalTy

palet

and

slighdy

shiny), and

with

the

petiolar

sheath

extending to the

base

of the

apical

pulvinus,

were

encouritered,

both

usually,

but not

exclusively,

in

association

with

limestone.

Anadendrum

Schott,

Bonplandia

5: 45 (1857); Mayo, Bogner

&

Boyce, Genera

of

Araceae 11,3,Map.11,

Pl.

11 (1997).

Snall

climbing hemiepipfutes. I-.eaues

opposite on climbing

shoots,

usually

congested-distichous

on flowering

shoots; petiole pulvinate

apically and basaliy, sheathed

to the

apical

pulvinus in most

species,

sheath persistent or marcesc ^ent; lamina obliquely ovato-oblong, entire;

primary Latenl veins pinnate, running into matginal vein,

^higher

order venation reticulate. Inflorescences 1'

-

⁷

rn

^each flo:a| sympodium;

peduncle relatively long. Spathe oblongo-ovate, boat-shaped,

inflating-

gaping at

female anthesis,

thence opening and remaining erect or

reflexing dudng male

anthesis,

gteenish vrhite to yellowish,

rz;ely

internally

purple-stained,

or bright

green,

rostrate

apt'cdly and much

overtopping the

spadix, caducous

after

anthesis,

rately

marcescent.

Spadix stipitate, cylindric.

Flowers

bisexual, perigoniate;

^perigone

membranaceous,

cup-like,

tepals

truncate,

equalling

or shottet

than

gynoecium; stamens 4,free, filaments relatively short, broad, spathulate,

sometimes extending

during

male anthesis

to

taise the anthers above

the gynoecium; connective

slender, thecae

lineat-elliptic,

dehiscing

by longrtudinal

sLit. Pollen

lrr

pert:ur^te, subspheroidal,

small

(mean

22 pm.), exine psilate or subretiptlate,

ptJae

spinulose tipped

and

solitary, or united into

group

s of 2 - 4 ot more.

^Glnoecium

wtrh

olrary

obconic or obpyramidal,

subquadrangrtlar, 1-iocular,

ovule

1,

anatropous,

funicle short,

placenta basal, stylar

region

as

broad

as

ov^ry, stigma transversely

oblong.

Fruits a

beny, distincdy

truncate

apicalTy, subglobose,

ripening from

gteen

through medium

yellow

to

scarlet

of

orange red. Seed rounded, subglobose, testa smooth, glossy,

embryo

Iarge, endospetm absent.

Anad,end,rum calci'cola Boyce & Wong, sp. noa, 'Lb

^allt'

THE SARA\rAK MUSEUM JOURNAI

PETERC l

Anadendrii

Botneensibus

^<

adultis

basaliter cuneads, ^,

gorgonoidiis bimodulis

(Sumatera) accedit, petioJ:

exserta distinguitur.

- Trpus:

lvlalay'sia, Sa

54.8"r

110o

08' 08.2",

45

\2ngAR-2450

(SAR,

hoio

C /i n bi ng ^{h eniepip} fu'le ^rc'

florvering shoots; climb^:

green. Itaues

on flot'ern:

petiole

5 - 33 cm long.

^ou

ca ^1.

- 2

^cm long; pefio,'-;" -',

conspicuous, long-persr::=

of

sheath

membranou:-:

^;

the extreme margl

^::--=:.

to 8-34x3-i-lcrr.. oblong

lanceolate.

''i:

_-..,

compared with the lel=:

aderrallv

dull.

mame o--.-- ^,

'-,11 '':r-erlile plants. base c-::

:::'r^-,-:lre

shoots,. aper

;f

- - :-.:- -

^.::*:

onman-

^.=:=:

:t-.t-.i -: .:::i jer

^{ie ar-e} s. -

=br:'--

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fttr'c "i:--. :i I

^{1-=1 :l-.-r'i-:}

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subte

lc.: -- -: : ::

each

hi-

- t--: --:1---: ^:

-t t,t-

- x

_{2 cm:}

r,i.1.':..: .:- -r

^.

-

^.

oldest irt iu,.

-:-

₌ ::

-:

^{: . :}

and the

u'hoie

.,. :::: -

r:

: :

-:

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NIS CNO/A.

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UAffId I OEQIOS

IO f

STUDIES ON MONSTERE,AE (ARACEAE) OF BORNEO I

module of the primary

arjs; ^pedwncle extending

during

development,

up to 17 cmlong,

^{ca 3}

mm wide duting

^anthesis,

lztetally

^somewhat

.o-pre.sed, p"1. green, occasionally slighdy glaucous.

^Spadix

stipiiate; ^stipe

to

1.5 cm

long,

3

mm

wide,

very

slighdy

longitudinally

aigled;fertileportion

of

spadix

cylindrical, obliquely insetted on

stipe,

Z

-

^Z.S

x

^{ca 0.7 cm, pale}

yellow

at anthesis, becoming darker ^yellow,

and thence gfeen ^as

fruit

begin

to

develop . spathe

inflating-gaping

^at

female

anthlsis, 8 X

^{1 cm,} pale green,

then

at onset

of

male anthesis

swiftly opening,

lanceolate,

and

conspicuously beaked,

10 X 3

^cm,

pale yellowish

white,

the

interiof

^\r/axy,

exterior

pale glaucous gfeen'

iprth.

late

in

anthesis reflexing and blackening

before

citcumscissile

,i

spathe/spadix inserrion, and fall,ing;Flowers 4

x

₆ mm;perigone mwch

shorter than gynoecium,

translucent

very

pale green; ^gynoecium pale

cfeamy yellov/, stigma

ca 1 mm, lineat,

transverse'

gynoecium latet

-.dio*

^yellow,

later still

^gfeen,

with

^{stigm^thc}

fem

Ifis blackening;

stamens

with filaments fiot extending during male

^{anthesis, anthers}

dehiscing

while still

^{concealed between adiacent flowers'} Infrurtesnnce

up

to

10 together, spreading

to

efect; ^spadix dark green;fruits

flpening

datk

^green

through yellow to

scadet.

Distribution: To

^{date endemic}

to

^Satawak,

but

^there widespread and

with

collections

from

very close to the

Brunei

^and

Kalim^nt^frborder

such

that it is

^almos

t

^certarnTy

distributed thtoughout N' Borneo

^as

fat north

^as

Brunei.

Hzbitat: climbing

hemiepiphyte in

pethumid

^{dense fotest,}

often

on,

but not

restricted to, limestone, ³⁵

-

⁴⁵⁰

m

^alt'

Notes: A highly distinctive

species

bv r.irtue of the large (fot

^the

genus) ^leu.res

with

the laminae abaxialll'glaucous, ^and

the

numefous

inflorescences produced in a strongly bimodulat gotgonoid

synfloresce nce. Anadercdrum ca/cico/ais similat

in

overall

^ppeaf^nce

to

A,ffineSchott(Sumatera)butteadilydistinguishedbythepersistent

p.tiol^,

^sheath,

and the

^anthers

not exseftttlg at

anthesis. Juvenile

plrrr,.

are remarkable by the long,

naffoq

occasionally almost l-ineaf,

lezf lamina.

THE, SARA\(/AK MUSEUM JO ^U RNAL

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IOANUO8IO

T\ Og'lugrild CINVIII NISCNOIN cNg ⁶⁸²

STUDIES ON MONSTEREAE (ARACEAE) OF BORNEO I

13

Dec.

2004, P.C. Boyq _Jeland ak Kisai

& M.

Gibernau

AR-872

(SAR);

Belaga,BeIaga road,

SungarUnan, 02" 55'

40.0"; 1.13" 44' 1.5.4", 12

Oct.

2005, P.C. Bo1a, Jeland ak Kisai & _Jipom

ak

Tisai

AR-|469

(SAF.).

Binnrlu Division:

Tatau,

Bukit

Sarang,

Grand Perfect field

station,

path to Gua Lubang Batu

Rusa

L-45,

^1,2

Jdy

2006, Skornickoua / 14

sab.

AR-20l5

(SAR).

Mid Division: Niah

Suai,

Niah National

Park,

Madu

Tlat7,03o

48'

57.9";1,1,3"

46'18.3",13July

2006,P.C. Bolce et

a/.

AR-/

882 (SAR);

Marudi, Long

Lamz,

Mulu

N.P.,

Trail to Gunung

Muiu Summit,

04"

02'

L8.7";1,1,4o 49'

44.2",29

Sept. _{2007 ,} P.C. Bolce

et a/.

AR-|957

(SAP*);

Marudi, Long Lama, Mulu

N.P.,

Nightwalk

Tnr7,04" 02' 42.2"; 114"

48'

55.5",

3

Oct.

2007, P.C. Boye et a/.

AR-

1999 (SAP.).

Limbang Division:

Nanga

Medamit, Mulu

N.P., Sungai

Empangau,

tributary from

Sungai

Mendalam,04o

13' 41.6";1,1,4" 52'

50.5", 30 Sept. 2007, P.C. Bojtce et a/.

AR-224,

(SAR).

Anad,end.rum

mulaensis Boyce & Wong,

sp.

noa.

Anandrum

muluensis

differt

ab speciebus ceteris laminis

foliorum

adaxrzY glaucis,

basalis cordatis, caulis

florenti

foliis non distichus congestis et staminis

non-exserta. Anandrwn cordatum accedit sed ab eo

foliis

subtus glaucis

atque

in

synflorescentiis

flotenti

ad apicem surculorum non-specialis

differens.

-

Typus: Malaysia, Sarawak,

Miri, Marudi, Long Lama,

Mulu

N.P.,

Trail

to

Deer Cave,}4"

02'

23.8";114o

48' 54.6",60 m asl,

27 Sept.2007, P.C. Boye, et al.

AR-|929

(SAR,

holo).

Plate

III.

Climbing heniepipfute

to two

metres

but

usually

much

less. Stems

weakly

compressed,

ca 5 mm flowering shoots, climbing

shoots

to c - 3 mm dia. glaucous medium green;

^{I-naues scattered}

to

ca 3 - 5 cm

^distant;

petiok 2 - 9 cm long,

canaltculate, pulvinate

aprcally and basally, ^apical puluinus ca ^1..5 cm

long,

strongiy D-shaped

in

cross section,

the

angles sharply defined; petiolar ^sheath extending

to the

base

of the

^apical

pulvinus,

conspicuous, pale green,

turning

yellow, then soon-marcescent, wings up to 3

mmwide.; /aninabtoadly

oblongo

lanceolate

to broadly

cordate, 3

-

¹²

x

^3.5

- 6

^{cm, slighdy}

oblique, base

sub-truncate

(and then

very

slighdy cordate at petiole

insertion)

to cordate, apex acute

with

^a conspicuous tubular mucro ca

1

mm long;

adaxially

dull,

matte

olive

green; abaxtally glaucous-grey,

THE SARAStrAK MUSEUM _J OURNAI

PETER C. I

particulatly on

^juvenile p1a

but half this number on

^s-

rais ed abaxtd)y ;

interprima

*

regularly interspersed

xir

mid-db at ca 60";2-order

Inforescences

ca 3

together

pnman shoots; fitst

nvo

termnal inflorescence

^suL

:,t,

.

>: rl.[]-1

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l::

^rur-enile

fruit before

the

s.,-ii.orescence alv'ar-s Cs;

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axts; pedunc/t ex--e

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2,5 mm lride :i

::edium

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fr= JO '] U![giI EI]AOS 5NOIA. CNV NIS CNS ^l6z

292 STUDIES ON MONSTEREAE (ARACEAE) OF BORNEO I

Notes:

Anadendrum muluensis

is

unusual

in the

genus

in floweting

on undifferentiated shoots

(as compared

with most

species where

flowering occurs on shoots with fans comprised of

^congested-

distichous

leaves).

The leaf

lamtnae

cordate

basaliy

and

giaucous

abaxjally, and stameris non-exserted during anthesis

readily

differentiates

A.

mu/uensis

from

all

other

Sarawak species.

In leaf form, and in carqnng inflorescences on shoots with

scattered leaves, A.

^mu/uensis

approaches A.

cordatum Schott

(Sumatera), and

A.

^{m o n ta n u} m var. ^{c o} rd atu m

Ridl.

@eninsular Malaysia),

from both it differs by

the leaves glaucous abanally and

the

anthers

not

exserting

during

anthesis.

ACKNOWILEDGEMENTS

The collaboration and support of the Sarawak Foresfty

Department,

the Forest Research Centre (I(uching),

The

Semenggoh

Botanical

Research

Cente, and the

Sarawak

Biodiversity

Centre

are much

appreciated.

This study was carded out under

Sarawak

Forestry Department

Research

Permit Nos

NPSfl907.4.2Q)-101

&

NCCD.907.4Q{t-41,,

and Park

Permit Nos 58/2007 &

37

/2009.

REFERENCES

Boyce, P.C.

In

Anadendrum

(Araceae: Monsteroideae:

Anadendreae)

in

press

Thailand. Thai Forest Bulktin (Botary)

Haigh, A., Bogner,J., Boyce, P.C., Gral-um, M.H., Kostelac, C., Croat, T.B.,

Hay,

A.,

Hetterscheid, $flL.A., Keating, R., Lay, L., Mayo, SJ., Mora, M.,

Reynolds, L., Sellaro, M.,

& \fong,

^S.Y

2008 A

new website

fot

Araceae taxonomy

on

www.cate-^r^ce2e.

otg. Aroideana 31: 148

-

^154.

THE SARA\TAK MUSEUM JOURNAL

PETER C

Plare

II: ^ln&rcdlrrn

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I

I OIINUOS

lO Ir:

294 STUDTES ON MONSTEREAE (ARACEA_E) OF BORNEO I

Plate

III:

Anadendrum muluensds Boyce

&

Wong. A. Plant

in

habitat. B.

Flowering shoot. Note that there is no congested {an of leaves. C. Synflorescence,

ventral view: D. Inflotescence at male anthesis. E. Leaf lamina, abaial view to

show glaucous surface. A-E: AR-/ 929. Images @Peter C. Boyce.

THE SARA\rAK MUSEUM JOURNAL