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PACIFIC SCIENCE, Vol. XIX, January 1965 
ligulate, the margins with salient prickles 1-1.5 
mm long, 1-2 mm apart; spikes about 7-10 and 
6-9 cm long, 1.5-2 cm in diameter, densely 
flowered; stamens in fascicles 12-18 mm long, 
with 15-23 anthers; column 7-9 mm long, 
papillose, bearing the anthers at its apex in an 
umbel; free filament tips 2-5 mm long, minutely 
papillose; anthers 3-4 mm long, more or less 
narrow oblong, but tapering upwards, bearing 
at its tip a 0.4-0.6 mm subulate projection of 
the connective. 
LECTOTYPE: Indian Ocean, Christmas Island, 
plateau, Oct. 1904, H. N. Ridley (sing). Type 
examined! Isotype (k) ! 
SPECIMENS EXAMINED: Christmas Island, 
Murray Hill Track, Oct. 1904, (staminate), H. 
N . Ridley (SING). 
Pandanus nativitatis Ridl. (sect. Pandanus ) , 
R. Asiat. Soc, Straits Br., Jour. 45:238- 
239, 1906 
Fig. 217 
DIAGNOSIS OF HOLOTYPE: "Bushy; branches 
about 2. 7-4.7 m. tall; leaves 2 m. or more long,” 
6.4 cm wide, coriaceous, at midsection with 46 
or 47 secondary parallel veins in each half, but 
no visible tertiary cross veins, swordlike, gradu- 
ally tapering to the 12 cm trigonous subulate 
apex, this 10 cm down 4 mm wide, lamina fur- 
rowed above the midrib and with 2 rounded 
pleats, the base not preserved, but near it the 
margins with prickles 1-3 mm long, 2-5 mm 
apart, stout subulate, pale, somewhat ascending; 
the midrib below, beginning at about 27 cm 
with prickles 2-2.5 mm long, 10-24 mm apart, 
slender subulate, arcuate, ascending; at midsec- 
tion the margins with prickles 1-1.5 mm long, 
3-6 mm apart, subulate, appressed ascending; 
the midrib below with prickles 1-1.5 mm long, 
6-11 mm apart, deltoid subulate, slightly ascend- 
ing; the subulate apex with the margins essen- 
tially unarmed; the midrib below with serrula- 
tions 0. 3-0.4 mm long, 2-5 mm apart; pistillate 
inflorescences terminal, bearing one syncarp; 
peduncle more than 12 cm long, 2 cm in di- 
ameter, 3-sided, leafy bracted; syncarp "orange, 
as big as a man’s head.” Phalanges (3 seen) 
5. 3-5. 7 cm long, 5 cm wide, 4.3 cm thick, 
cuneate quadrate, the apex low convex, upper 
2 A free, lateral sutures deep in free part, the 
sides flattish or gently convex, smooth, shining, | 
5 -angled; sinuses of small central apices 2 mm | 
deep, of the larger marginal ones 4-6 mm deep, I 
the depth mostly in the narrow V-shaped bot- 
tom; carpels 9 (but in a double the carpels 23 
and the phalange 8.5 cm wide), the apices of 
the marginal ones broad and retuse, with a 
large concavity distal of the stigma; central 
carpels with apices V 3 -V 2 the size of the others, 
low pyramidal-convex, lacking the apical con- 
cavity; stigma 1 mm long, transversely elliptic, 
flush or oblique, centripetal, creased, brown, 
papillose, proximal crease deep, usually extend- 
ing to the valley bottom; endocarp supramedian, 
bony, dark brown, the lateral walls 3-4 mm 
thick; seeds 11-15 mm long, ellipsoid; upper 
mesocarp forming in the apex of each carpel a 
cavern traversed by several strong fibers; basal 
mesocarp fibrous and fleshy. 
HOLOTYPUS: Christmas Island (Indian 
Ocean), Waterfall, Oct. 1904, H. N. Ridley 
(SING). 
Pandanus Hendersonii sp. nov. (sect. 
Pandanus) 
Fig. 218 
DIAGNOSIS HOLOTYPI: Arbor 2.7 m alta, 
foliis 1.01-1.53 m longis 4-5 cm latis coriaceis 
supra viridibus infra subpallidioribus supra mid- 
nervum sulcatis et cum plicis binis obtusis in 
sectione mediali cum 38-42 nervis secundariis 
parallelis in quoque dimidio nervis tertiis non 
evidentis lamina gladiformata ex basi sensim in 
apice 15 cm longo trigono subulato diminuenti 
eo 10 cm ex apice 4 mm lato basi amplexicauli 
et inermi sed ex 4-5 cm marginibus cum aculeis 
1.5-5 mm longis 3-12 mm separatis subulatis 
pallidis adscendentibus, midnervo infra ex 11 
cm cum aculeis 1.5-2. 5 mm longis 13-21 mm 
separatis crassiter subulatis reflexis, in sectione 
mediali marginibus et midnervo infra cum 
aculeis 2-2.5 mm longis 4-8 mm separatis subu- 
latis adpresse adscendentibus apicibus brunneis, 
in apice subulato marginibus et midnervo infra 
cum serrulis 0.2-0. 5 mm longis 1-8 mm sepa- 
ratis, infructescentia pendenti cum syncarpio 
unico, pedunculo 20 cm et plus longo folioso- 
bracteato, syncarpio 19 cm longo 11 cm dia- 
metro anguste obovoideo-ellipsoideo subtrigono 
cum 70 phalangibus eis 4.5-5 cm longis 2.8- 
4 cm latis 2. 4-3.4 cm crassis pyriformatis 
