Areca catechu L. var. batanensis Becc., Philipp. J. Sci. 3: 304 1908. Type: the
Philippines, Batanes Island, 6.vi.1907, Fenix 3834 holotype: FI.
Areca macrocarpa Becc., Phillip. J. Sci. C4: 601 1909. Type: the Philippines, Mindanao,
Zamboanga District, Port Banga, i.1908, Whitford Hutchinson 9103 holotype: FI.
Areca catechu L. var. longicarpa Becc., Philipp. J. Sci. 6: 229 1911. Type: the
Philippines, Polillo Island, 10.xi.1909, Mc Gregor 10470 holotype: FI. Areca catechu
L. f. communis Becc., Philipp. J. Sci. 14: 304 1919. Type: the Philippines,
Mindanao, Misamis Province, Katajan, Mt. Malindang, Mearns Hutchinson 4717 holotype: FI.
Areca catechu L. var. silvatica Becc., Becc., Philipp. J. Sci. 14: 304 1919. Type: the
Philippines, Palawan, Lake Manguao, iv.1913, Merrill 9447 holotype: FI; isotypes: K,
L.
Distribution: Cultivated old world tropics.
6. A
RECA CONCINNA
T
HWAITES
Areca concinna Thwaites, Enum. Pl. Zeyl.: 328 1864.
Type: S
RI
L
ANKA
Ceylon, C. P. 620 holotype: not traced; isotypes: FI, K. Distribution:
Sri Lanka. Notes:
Areca concinna is poorly known and is only represented by its type specimen. Although there are a few specimens of Areca collected from Sri Lanka they are all Areca
triandra .
7. A
RECA COSTULATA
B
ECC
. Areca costulata
Becc., Philipp. J. Sci. 14: 310 1919.
Type: T
HE
P
HILIPPINES
, Leyte, Dagami, viii.1912, Ramos 15236 holotype: FI; isotype: K. Distribution:
The Philippines.
8. A
RECA DRANSFIELDII
H
EATUBUN SP
.
NOV
. F
IG
. 2.
Type: B
ORNEO
, Sarawak, Miri, Lambir National Park, Path from waterfall, 17 m, 1.iv.2008, Heatubun Rebi 901 holotype: K; isotype: SAR.
Diagnosis: Ad subgenerum Arecam inflorescentia structura A. tunku J. Dransf. Lim
Chong Keat affinis, sed caule caespitoso, inflorescentia cremea vel viride, floribus staminatis uniseriatim vel distichis, staminibus antheris dorsifixis, floribus foemineis
solitariis in rachillis differt.
Description: Small, slender, unarmed, monoecious, pleonanthic undergrowth palmlet,
clustering rarely solitary with aerial branching, sometimes decumbent, stilt roots up to 40 cm. S
TEM
2 −3 m tall, 1−2.5 cm diam.; internodes 1−4 cm long, green near tip and greyish
at the base, nodal scars conspicuous, whitish brown. L
EAVES
5 −7 in crown, pinnate,
100 −165 cm long including petiole; sheath tubular, 15−25 cm long, smooth, pale green to
mid green; crownshaft well defined, 30 −40 cm long and up to 2−2.5 cm diam.; petiole
25 −81 cm long, channelled adaxially, rounded abaxially; rachis ascending but not arching,
with adaxial longitudinal ridge, rounded abaxially; blade with regularly arranged leaflets, 9
−23 leaflets on each side; leaflets somewhat descending, 1−2 main veins running parallel from the base to the tip, leaflets near petiole small, c. 30 × 0.9 cm, slightly sigmoid, the
middle leaflets about 46 × 2.1 cm and the terminal 27 −29 × 1.1−1.8 cm, linear, pointed tip
except for the terminal slightly oblique-lobed, papery, green adaxially and pale green abaxially. I
NFLORESCENCE
infrafoliar, erect, 10 −14 cm long at anthesis, protandrous,
branching to 1 order; peduncle 1 −2.5 cm long, cream when young and turning green when
mature; prophyll green, c. 13 × 2 cm, elongate-triangular with pointed tip; rachis cream to green; rachis bracts not persistent; rachillae 5
−7 and 7–11 cm long, very stiff and stout, flattened, elongate. S
TAMINATE FLOWERS
small, triangular, 3.5 −6.3 × 1.8−2.2 mm,
asymmetric, cream to pale green; sepals 3, low, about 1.5 × 1.5 mm; petals 3, triangular, 4.0
−4.5 × 2.4−2.7 mm, striate; stamens 6, c. 2.5 mm × 1.9 mm,; anthers dorsifixed, 2.1−3.0 × 0.5
−1.0 mm, cream-coloured, elongate, longer than the filaments; filaments 1.2−1.5 × 0.4 mm, dark brown; pistillode low, c. 0.5 × 0.5 mm, rounded. P
ISTILLATE FLOWERS
larger than the staminate, triangular, borne on the enlarged rachillae, buds varying greatly in size
depending on stage of development, just before anthesis 15.4 −18.2 mm long and 10−11
mm wide, pale green to green; sepals 3, strongly imbricate, c. 11.8 × 8 mm, triangular, asymmetrical; petals 3, imbricate, triangular, 5.5
−12.6 × 2.5−5.2 mm; staminodes 3−4, irregular dentiform, 0.8 mm high. F
RUITS
elongate, sickle-shaped to ovoid, immature c. 3.8 × 1 cm, apical stigmatic remains, perianth sometimes persistent; epicarp smooth, shiny,
very thin, dark green when young; mesocarp fibrous, c. 2.6 mm thick in immature fruit; endocarp very thin, adhering closely to seed. S
EEDS
elongated with pointed tip, c. 2.4 × 0.43 mm in immature fruit; endosperm ruminate; embryo basal. E
OPHYLL
bifid.
Distribution and Ecology:
Central and Northern parts of Borneo in Central Kalimantan, Sarawak and Brunei Darussalam. This palm grows in primary forest in mixed
Dipterocarp forest. Other palms that occupied the same habitat are Areca insignis var. moorei
