486 
PACIFIC SCIENCE, Vol. XVII, October 1963 
ing; the midrib below unarmed; on the subulate 
apex the margins with serrations 0.6-1 mm 
long, 1-3 mm apart; the midrib below with 
serrations 0. 3-0.8 mm long, 3-4 mm apart; pe- 
duncle "short”; syncarp single, 7 cm long, 5.5 
cm in diameter, broadly ellipsoid, purplish, bear- 
ing 113 drupes, these 22-26 mm long, 9-14 mm 
wide, 9-1 1 mm thick, oblanceoloid from a trun- 
cate base, 6-angled, upper Va free, the body 
18-22 mm long, with flat sides; pileus 6-8 mm 
high, its base 4-5 mm high, semiorbicular or 
oblately so, the surface roughened, dull, weakly 
6-angled; style 2.5-5 mm long, bony, brown, 
shining, flattened, proximally curved, the lateral 
ones mostly shortly bifid, but some of the basal 
ones with a single, subulate tip; stigma 1-1.5 
mm long, cordate or broadly so, brown, papil- 
lose, in the hollow proximal tip; endocarp me- 
dian, 1 1 mm long, bony, pale without, the walls 
0.8 mm thick, within dark brown and shining; 
seed 10 mm long, 8 mm in diameter, obovoid; 
apical mesocarp an aerenchyma with broad 
transverse, white membranes; basal mesocarp fi- 
brous and fleshy. 
HOLOTYPUS: Thailand, n. e. region, Loei, Phu 
Krading, Tham Saw, common in evergreen for- 
est, 1,300 m. alt., Tem Smitinand 406 (bkf no. 
11,999). 
DISCUSSION: P. reticulosus is a member of 
the section Rykia, as is its closest relative, P. 
bicornis Ridl. of Malaya, a species which has 
the syncarp 15 cm long; drupes 34 mm long; 
style forks spreading and with the tips recurved; 
seed 6 mm long, cylindric; and the leaf margin 
near the base with spines 2.5-4 mm long, and 
2-7 mm apart. P. reticulosus has the syncarp 7 
cm long; drupes 22-26 mm long; style forks as- 
cending or diverging; seed 10 mm long, obo- 
void; and the leaf margin near the base with 
spines 3-5 mm long, and 12-22 mm apart. 
The new epithet is the Latin adjective, reticu- 
losus , with a network, and is given in reference 
to the reticulate venation of the leaves. 
Pandanus thailandicus sp. nov. (sect. Rykia ) 
Figs. 202, 203 
nom. vern.: "toei nam.” 
diagnosis holotypi: Frutex 1.5 m altus 
ramosus, foliis 35-37 cm longis 6-8 mm latis 
subcoriaceis ligulatis plana tis vel marginibus 
paene involutis in sectione mediali cum 13 
nervis secundariis parallelis in quoque dimidio 
parte Vi supera sensim in apice subulato dimi- 
nuenti 10 cm ex apice 4 mm lata in sicco palli- 
dis et infra subglaucis in basi amplexicaulibus 
et integris proxima basem marginibus cum acu- 
leis 1.8-2. 2 mm longis 8-15 mm separatis ad- 
scendentibus arcuato-subulatis stramineis, mid- 
nervo infra cum aculeis 2.2-2. 5 mm longis 8-25 
mm distantibus simulantibus adscendentibus, in 
sectione mediali marginibus cum aculeis 1. 3-1.8 
mm longis 4-7 mm separatis simulantibus sed 
subadpressis, midnervo infra cum aculeis 1.7-2 
mm longis 6-15 mm separatis simulantibus ad- 
scendentibus, proxima apicem marginibus cum 
serris 0. 1-0.3 mm longis 1-4 mm separatis ad- 
pressis cum apicibus subulatis, midnervo infra 
cum serris 0.2-0.6 mm longis 2.5-6 mm sepa- 
ratis simulantibus, pedunculo terminali 7 cm 
longo 3-4 mm diametro folioso-bracteato, syn- 
carpio solitario pendenti 36 mm longo, 35 mm 
diametro elliptico-subgloboso cum circa 230 
drupis, eis 14-1 6 mm longis 4-4.2 mm latis 3 
mm crassis anguste oblanceoloideis 5-7-angu- 
losis lateribus subcurvatis parte Va supera libera, 
pileo conico sed in sicco cum rugis longitudi- 
nalibus, stylo 2.5-3 mm longo crasse subulato 
cartilagineo pallido proximo-curvato, stigmate 
2-2.5 mm longo lanceolato proximo brunneo 
papillose, endocarpio centrali 6 mm longo an- 
guste obovoideo cartilagineo obscure brunneo 
intra lucido lateribus 0.1 mm crassis, mesocar- 
pio apicali lateralique conjuncto sicco et medul- 
loso, mesocarpio basali fibroso et carnoso. 
DESCRIPTION OF ALL SPECIMENS EXAMINED: 
Branching shrub 1.5 m tall; stem 8-10 mm in 
diameter, yellowish, unarmed; prop roots not 
mentioned; leaves 35-50 cm long, 6-10 mm 
wide, subcoriaceous, ligulate, flat or the margins 
slightly involute, at midsection with 13 parallel 
secondary veins in each half, the upper Vi gradu- 
ally tapering to the acute tip, this 10 cm from 
the apex 4 mm wide, when dried pale and below 
somewhat glaucous, the very base amplexicaul 
and unarmed, near the base the margins with 
prickles 1.8-2 .2 mm long, 8-15 mm apart, 
ascending, arcuate subulate, stramineous; the 
nearby midrib below with similar ascending 
prickles 2. 2-2. 5 mm long, 8-25 mm apart; at 
midsection the margins with prickles 1.3-1. 8 
mm long, 4-7 mm apart, similar but subap- 
