Revision of the Genus Pandanus Stickman, Part 22 
A New Species (Section Hombronia) from New Caledonia 
Harold St. John 1 
Numerous botanists in the tropics of the 
Pacific and of the eastern hemisphere have 
assisted the writer by making new collections 
of Pandanus. The new species here announced 
is named in honor of one of these cooperators, 
Prof. H. S. McKee of the University of Sydney. 
Pandanus Mc-Keei sp. nov. (sect. Hombronia') 
Figs. 238-239 
diagnosis holotypi : Arbor 5 m alta ramosa, 
radicibus fulturosis nullis, foliis 1.5 m longis 
proxima basem 7.2 cm latis in medio 6.5 cm 
latis coriaceis supra obscure viridibus infra 
pallide viridibus basi rubra ligulatis gradatim 
ex media ad apicem diminuentibus, basi paene 
latiore exarmata sed ex 11-12 cm marginibus 
cum aciculato-serris 1-1.5 mm longis 1-5 mm 
distantibus eis in puncto nigro, midnervo toto 
exarmato, circa medim marginibus cum serris 
nigris 0.3-0. 5 mm longis 2-6 mm distantibus, 
circa apicem marginibus cum dentibus nigris 
crenulatis 0.1-0. 3 mm longis 1-3 mm distan- 
tibus ; pedunculo folioso, syncarpio solitario 
apicali 36 cm longo 17 cm diametro anguste 
oblongo-ellipsoideo cum circa 286 phalangibus 
ordinatis in helicis et sereis verticalibus, pha- 
langibus 4. 2-4.6 cm longis 2.4-3. 1 cm latis 
1.5- 2 cm crassis rubro-brunneis sed intra pallide 
luteis elliptico-oblongis in medio subcontracts 
parte supera % libera apice concavo in sicco 
brunneis, lateribus minime curvatis et cum 
fissuris multis brunneis longitudinalibus, 5-6- 
angulosis, suturis lateralibus nullis, carpellis 
5-7 in piano unico laterali ordinato, stigmatibus 
1.5- 2. 6 mm latis brunneis cordatis vel obliquiter 
cordatis in latere ad apicem syncarpii obtutis, 
endocarpio in parte % infera et 12-14 mm 
longo osseoso brunneo lateribus 3—4 mm crassis, 
seminibus 6-8 mm longis 2-3 mm diametro 
ellipsoideo, mesocarpio caverno unico 25 mm 
longo pluri-fibroso et cum membranis albis 
1 B. P. Bishop Museum, Honolulu, Hawaii. Manu- 
script received December 3, 1962. 
medullosis formanti, mesocarpio basali fibroso et 
cavernoso 3-6 mm longo. 
description of holotype: Tree 5 m tall, 
branched several times; prop roots none; leaves 
1.5 m long, 7.2 cm wide near the base, 6.5 cm 
wide at the middle, coriaceous, dark-green 
above, light-green below, base red, ligulate, 
gradually tapering from the middle to the apex, 
the base scarcely widened, unarmed, beginning 
at 11-12 cm the margins acicular-serrate, the 
teeth 1-1.5 mm long, 1-5 mm apart, black- 
tipped; the midrib unarmed throughout; at the 
midsection the margins black serrulate, the 
teeth 0.3-0. 5 mm long, 2-6 mm apart; near 
the apex the margins black crenulate, the teeth 
0. 1-0.3 mm long; peduncle leafy bracted; 
syncarp solitary, terminal, 36 cm long, 17 cm in 
diameter, narrowly oblong-ellipsoid, the pha- 
langes about 286, in spiral and in vertical 
rows; phalanges 4.2 -4.6 cm long, 2.4-3. 1 cm 
wide, 1.5—2 cm thick, reddish-brown without, 
light-yellow within, elliptic-oblong, slightly 
contracted at midsection, upper I/4 free; apex 
concave, dull, brownish when dry, the exposed 
sides gently curving and with numerous longi- 
tudinal, brown cracks, 5-6-angled ; lateral 
sutures none; carpels 5-7, in one lateral plane; 
stigmas 1.5-2. 6 mm wide, brown, cordate or 
obliquely so, facing sideways toward the apex 
of the syncarp; endocarp at lower and 12-14 
mm long, bony, brown, the lateral walls 3-4 
mm thick; seeds 6-8 mm long 2-3 mm in 
diameter, ellipsoid; apical mesocarp forming 
one cavern 25 mm long, with an open passage 
above each seed, with numerous, strong, longi- 
tudinal fibers and pale medullary membranes; 
basal mesocarp fibrous and cavernous, 3-6 mm. 
long. 
holotypus: New Caledonia, 7 km. S. of 
Riviere des Pirogues, on bank of creek, 50 m 
alt, 15 Oct., 1955, H. S. McKee 5,229 (bish). 
Isotype (L) ! 
282 
