484 
PACIFIC SCIENCE, Vol. XVII, October 1963 
valleys like mortising angles, the apex rounded 
but from each of two angles a ridge mounts to 
support the stigma on a flattened, overhanging 
process or style; stigma 8 mm long, broadly obo- 
vate, without crease, nearly vertical, brown; en- 
docarp submedian, the central part 4.3 cm long, 
bony, dark brown, and ellipsoid, its lateral walls 
2-3 mm thick, a little below the middle of this 
central endocarp are heavy, pale, lateral shoul- 
ders bearing heavy marginal flanges 3. 5-4. 5 cm 
long; seed solitary, 25 mm long, 9 mm in di- 
ameter, ellipsoid; lateral and apical mesocarp 
continuous, dry and pithy but with longitudinal 
fibers, and this pithy mesocarp also occupies the 
upper half of the area below the endocarp, the 
remaining basal area fibrous and fleshy. 
HOLOTYPUS: Thailand (Siam): Menam Pasak, 
Keng Koi, on rocky limestone hill, Dec. 9, 1923, 
A. F. G. Kerr 7,669 (bk). 
DISCUSSION: P. ohovatus is a member of the 
section Rykia, though with its large, dry, pithy 
drupes it is unique and without a close relative. 
It can be compared to P. borneensis Warb. 
which has the syncarps spicate, 6-8 cm long; 
drupe apex 10-12 mm broad; and the style 2 
mm long. In P. obovatus the syncarp is solitary, 
about 23 cm long; drupe apex 4.9 cm broad; 
and the style 1 1 mm long, horn-like, flattened. 
The type specimen consists of a leaf minus 
the tip, and three fruit halves, yet so unique is 
the species that this much suffices. There are no 
really close relatives known. 
The new epithet is the Latin obovatus, refer- 
ring to the obovate profile of the drupes. 
Pandanus reticulosus sp. nov. (sect. Rykia ) 
Fig. 201 
NOM. VERN.: "toei yai” (— Pandanus big). 
diagnosis holotypi: Licet acaulescens, foliis 
2 m longis 5 cm latis in medio 3.8 cm latis circa 
basem coriaceis reticulatis in sectione mediale 
cum 33 nervis secundariis parallelis fortibus in 
quoque dimidio, nervis tertiis transversis fortibus 
elevatis et reticulam quadratorum vel oblongo- 
rum brevium formantibus, laminis ligulatis sed 
subabrupte in apice circa 10 cm longo caudato 
trigono subulato diminuentibus eo circa 10 cm 
ex apice 5 mm lato, basi amplexicauli et inermi 
pallida sed ex 7-15 cm marginibus cum aculeis 
3-5 mm longis 12-22 mm separatis subulatis 
curvatis fortibus pallidis adscendentibus, mid- 
nervo infra ex 12.5 cm cum aculeis 3-6 mm 
longis 32-65 mm separatis arcuato-subulatis 
reflexis, in sectione mediali marginibus cum 
aculeis 2.8-3 mm longis 14-24 mm separatis 
arcuatis subulatis adscendentibus, midnervo infra 
inermi, in apice subulato marginibus cum ser- 
rulis 0.6-1 mm longis 1-3 mm separatis, mid- 
nervo infra cum serrulis 0. 3-0.8 mm longis 3-4 
mm separatis, pedunculo "brevi,” syncarpio soli- 
tario 7 cm longo 5.5 cm diametro latiter ellip- 
soideo purpurascenti cum 113 drupis, eis 22-26 
mm longis 9-14 mm latis 9-11 mm crassis ob- 
lanceoloideis basi truncata 6-angulosis parte Va 
supera libera, corpore 18-22 mm longo later ibus 
planis, pileo 6-8 mm alto basi 4-5 mm alto 
semiorbiculari vel depresse semiorbiculari rugosa 
exlaevi minime 6-angulosa, stylo 2.5-5 mm 
longo osseoso brunneo lucido compresso proxime 
curvato eis druparum lateralium plerumque 
breviter bifidis sed aliquis basalibus subulatis, 
stigmate 1-1.5 mm longo cordato vel late cor- 
dato brunneo papilloso in apice proximali caver - 
noso affix!, endocarpio mediali 11 mm longo 
osseoso extus pallid! lateribus 0.8 mm crassis 
intra obscure brunneis et lucidis, seminibus 10 
mm longis 8 mm diametro obovoideis, meso- 
carpio apicali aerenchymati cum membranis latis 
transversis albis, mesocarpio basali fibroso et 
carnoso. 
DIAGNOSIS OF holotype: Apparently acau- 
lescent, gregarious on ground among under- 
shrubs; leaves 2 m long, 5 cm wide at the mid- 
dle, 3.8 cm wide near the base, coriaceous, reti- 
culately veined and conspicuously so in outer 
half, at midsection with 33 parallel secondary 
veins in each half, the tertiary cross veins heavy, 
raised, forming a reticulum of squares or short 
oblongs, blade ligulate, rather abruptly narrowed 
to a caudate trigonous subulate apex about 10 
cm long, this about 10 cm down 5 mm wide, the 
base amplexicaul and unarmed, pale, but be- 
ginning 7-15 cm up the margins with spines 
3-5 mm long, 12-22 mm apart, stout curved 
subulate, ascending, pale; the midrib below be- 
ginning at 12.5 cm with spines 3-6 mm long, 
32-65 mm apart, arcuate subulate, reflexed; at 
midsection the margins with prickles 2.8-3 mm 
long, 14-24 mm apart, arcuate subulate, ascend- 
