Freycinetia (pandanaceae) of Sumatra

FJ

*

g p p 0

g g g z

S P * Z

P s s " " 3 1 37J,rnQ 9 Q Q s

P s " = S O ~ A H A R A PASARIBU, Freyandn

(Pandanaceae)

of Snmatn, supentised

9 by SRI S. TJITROSOEDIRDJO,

ALEX

HARTANA, MIEN A WAZ,

rYn E8 Q

gs.ag

ELIZABETIIAWIDJAJA

s;ggs.

Q c P r s Q

9 g f 4 5

; g ~ e "

Freychetia Gaud.. is one of the four extant genera of Pandanaceae. The

3 g g ~ 5 @nus consists of approximately 200 species, in which b o a

all

are c~imbers.

W ! Z S R

s - 0

S

,.

,

,

gjhe genus is distributed from Sri Lanka tbrough the mainland of South East Asia 9 g . 0 r U ? rn

,,

@d Malesia floristic region to northern Australia

( Q u d a n d )

and

New

zealand,

8

2

&

2

2

B e r e it is the only member of Pandanaceae existed. The main diversity is within

g

,

Q * Q

c

Q P

g

c Z-

2

&esia, particularly Borneo, the Philippines, and New

Guiaea

Despite its

8.8;

s

&ng diversity in Malesia the diversity of the genus in

Sumatra

is less studied

1 6 Grnpare to neighbouring areas like the Malay Peninsula and Borneo. Eigkk;

S . = . Q The aim of this current study is to

study

the species diversity in

Sumatra

p 9 3 @d adjacent islaads covering the morphological, anatomical, and ecological

5

$ 8

apects in order to have a better understanding on the species delimitation and

g

g $

&tributional patterns.

$

9 % _{result of this present study recognises fourteen species existed in}

-

C zf9

J. Y Q in which four are proposed as new species, namely

F.

berbakensis

3:

E

9 vidjaja, Pasaribu & Hidayat, F. dewiIdeonmr Pasariby F. k r e n r i s Pasariby

Q

0

,

_s md F. scabrosa Pasaribu & Widjaja Twelve species are climbers, wheqeas two

5

8

@scrambling shrubs.

P

3 5 2

The

r d t of phenetic analysis on morphological and anatomical data

b

r suggests that there are three groups of species within the Sumatran species. The

Z E

z

coefficient similarity value is 0.58 and this means that the two groups have 58 %

7J

5

x ?

morphological similarities. Freycfnetia kamiana, F. leuserensis,

E

~ . m ,

g

-9 _{in one} F. imbri-, _chster

E

_{with coefficient similarity of} jawnic4,

F.

scandens, F. scnbrm, _{0.65, whereas} and F. rigicliyolia _{F. ~ ~ o l i a ,} are grouped

x.

3

g

c F. berhkmis,

E

coqfkw, E F.cfistigmata,

and

and

w i h b & z a are clustered in

B

$

another group with coefficient similarity of 0.66.

"

g

=.

The resuhs of anatomical study and SEM indicate that qualitative data

r _{arrangement of stomata, epidermal cells, palisade, and sponge tissue}

8

s 6om transverse section) is relatively invariable within the fourteen

=.

2. ies thus considered

as

more reliable

as

supporting data for species

e

@Limitation compare to quantitative data (such as s t 0 4 size, index, and

9 ency), which is more variable.

E _{The r d of emlogical study indicates that species of Frejcinetia in}

$

3 q m a t r a occupy various types of habitats. Nevertheless, they generally inhabit

B b i d primary and secondary forsts ranging from 5 to 1950

m

altitudes along the

E

7 &san Range. Most of the species are found on lowland at altitudes below f OOO

@th

a d rainfall ranging from 20-2500 to 4 5 0 0 - 5 0 mm per year. eycinetia angustifolia,

F.

i m b r i m

F.

javanica,

F.

rigidijiolia, F. &m and

B

sunmtrma are species that occupied wide ranges of habims. There are at least

C

3

7'

0

3

-.