344 
PACIFIC SCIENCE, Vol. XVII, July 1963 
1.8 cm wide, near the middle 2. 8-3. 8 cm wide, 
in section with a broad, central channel, and 
hence M-shaped, the secondary parallel veins at 
midsection 19-20 in each half, prominent, the 
tertiary cross veins visible below, transverse or 
oblique, forming short, somewhat oblong 
meshes, the actual base amplexicaul and un- 
armed, but beginning at 2-2.5 cm the margins 
with prickles 1.5-2. 5 mm long, 4-9 mm apart, 
broad subulate, ascending, pale; the midrib 
unarmed except near the tip; at midsection the 
margins with prickles 2. 1-2. 5 mm long, 7-23 
mm apart, similar; near the 3-8 cm apex the 
margins and midrib below with serrulations 
0.2-0. 3 mm long, 2-6 mm apart, brown; pe- 
duncle terminal, 5 cm long, leafy bracted, bear- 
ing 4 syncarps in a dense spike about 10 cm 
long; syncarps subequal, 5-6 cm long, 3-5 — 4.5 
cm in diameter, ovoid to broadly ellipsoid, bear- 
ing 64-88 drupes, these 19-21 mm long (in- 
cluding the stigma), 7-10.5 mm wide, 6-8 mm 
thick, oblanceoloid with an obtusely convex 
apex, the sides 5-6-angled, smooth, when dried 
brown, the body 15-17 mm long, cuneiform; 
pileus 6-7 mm long, oblate semiorbicular; style 
subterminal, 0.5-1 mm long, vertical except on 
the basal drupes where sharply reflexed distally; 
stigmas on the expanded apical surface, 4—7 
mm Jm diameter, 4-7 -pointed, horizontal or 
mushroom-shaped, papillose, brown; drupe body 
14-17 mm long; endocarp centering in lower 
34, bony, light brown, the inner surface shining, 
the lateral walls 0.5 mm thick, the apical plug 
1—1.3 mm thick; seeds 6-7 mm long, obdeltoid; 
apical mesocarp with a cavity 6-7 mm long, 
with a few white membranes near the margins; 
basal mesocarp sparse, fibrous and fleshy. 
EXPANDED DESCRIPTION OF ALL PISTILLATE 
PLANTS EXAMINED: Plants 1.5-4 m tall; leaves 
55-113 cm long, at midsection with 1 9—2 9 sec- 
ondary parallel veins in each half; peduncle 5—7 
cm long, bearing 2-5 syncarps, these 4-6 cm 
long; drupes 7-13 mm wide, 6-10 mm thick, 
bright yellow. 
DESCRIPTION OF STAMINATE PLANTS: Leaves 
63-70 cm long, near the base 20-21 mm wide, 
near the middle 26-29 mm wide, at midsection 
the parallel secondary veins 22-24 in each half, 
and at midsection the margins with appressed 
ascending serrulations 0. 3-0.4 mm long, 7-12 
mm apart; staminate inflorescence 47 cm long, 
leafy bracted; lowest bract 47 cm long, 2.2 cm 
wide, for the lower 10 cm slightly distended, 
sheathing and paler, the rest foliaceous; floral 
bracts thin, apparently white, the median one 
1 5 cm long, 4.6 cm wide, lanceolate, on the outer 
34 the margins and midrib below with serrula- 
tions 0.1 mm long, 0.2-1 mm apart; the 7 
spikes 3-6 cm long, 12-15 mm in diameter, 
cylindric, dense; fascicle 5-8 mm long, with 
19-22 stamens, the naked common column 3-4 
mm long, rhachis 2-2.5 mm long, clavate; free 
filament tips 1-2 mm long, divergent; anthers 
1.5-2 mm long, linear-oblong, bearing a pale 
subulate projection of the connective 0.2-0.3 
mm long. 
LECTOTYPE: Malaya, "Selangor, on the Tras 
Route at the 20th mile (8775),” 2,000 ft. elev., 
July 1897, H. N. Ridley (SING). Lectotype here 
designated; specimen examined! Isotype ( FI ) ! 
SPECIMENS EXAMINED: Malaya: Perak, Larut, 
top of mountains, open junfgle], 2,000 to 3,000 
ft. alt., April 1883, H. Kunstler 4,166 (cal); 
Haram Parak, June 1884, Scortechini ( CAL ) . 
Pahang: Gunong Tahan, 7 Sept. 1937, E. J. 
H. Corner (SING) ; Sungei Chelia, Chegar Perah, 
14 Oct. 1927, M. R. Henderson 19,370 (sing). 
Penang: Government Hill, Dec. 1895, C. 
Curtis (SING); Waterfall Hill, 500 ft. alt., June 
’88, L. Wray Jr. 2,227 (cal) . 
SECTION Hombronia 
Pandanus irregularis Ridl., FI. Malay Penin. 5: 
76-77, 1925; Henderson, M. R., Roy. 
Asiat. Soc., Malay Branch, Jour. 17: 82, 
1939; (sect. Hombronia) 
Figs. 182, 183 
DIAGNOSIS OF HOLOTYPE: "Leaves long, very 
broad,” 9-3 cm wide, thick and leathery, 1- 
ribbed, 2 -pleated, in section depressed, AA- 
shaped, the secondary parallel veins visible be- 
low, scarcely so above and at midsection 83-92 
in each half, the base amplexicaul and unarmed, 
but beginning at 12 cm up the margins with 
thorns 4.5 mm long, 1-2 cm apart, heavy deltoid 
subulate, black-tipped, ascending; the midrib 
below with similar reflexed thorns 2-3 cm apart; 
