Syzygium jiewhoei, a new species from Western New Guinea 
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Table 1 . Comparison of morphological characteristics between Syzygium jiewhoei Hambali, 
Sunarti & Y.W.Low and S. recurvovenosum (Lauterb.) Diels. 
Syzygium jiewhoei 
Syzygium recurvovenosum 
Young twigs 
Prominently quadrangular 
and winged 
Prominently quadrangular 
Lamina 
Slightly bullate 
Unknown 
Secondary veins 
90-100 pairs 
Up to 55 pairs 
Inflorescence 
c. 14-16 cm long 
Up to 9 cm long 
Peduncle 
c. 13-15 mm wide 
Up to 3.5 mm wide 
Style 
c. 8-18 mm long 
c. 4 mm long 
Fruits 
Ovoid to broad-ellipsoid, 4-6 cm 
long, maturing salmon-pink 
Pyriform, 2.3 cm long, 
red (immature) 
garden in Singapore, from which the material for the herbarium was taken. Type 
materials of Syzygium species at BO, K and SING were examined, including type 
images of all Malesian Syzygium species available on JSTOR® Global Plants website 
(http://plants.jstor.org). Provisional conservation assessments are made using the 
methodology proposed by IUCN (2012). 
Taxonomy 
Syzygium jiewhoei Hambali, Sunarti & Y.W.Low, sp. nov. 
Similar to Syzygium recurvovenosum (Lauterb.) Diels but differs in having 90-100 
pairs of secondary veins (vs up to 55 pairs of secondary veins in S. recurvovenosum :), 
14-16 cm long inflorescences with 13-15 mm wide peduncles (vs up to 9 cm long and 
c. 3.5 mm wide in S. recurvovenoswri), and 8-18 mm long styles (vs 4 mm long in S. 
recurvovenosum). - TYPE: Native to Indonesia, Western New Guinea, Papua, Timika, 
Kuala Kencana, living collection cultivated in Mr Tan Jiew Hoe’s garden in Singapore, 
vouchered on 3 July 2016 as Hambali, G.G. s.n. (holotype BO; isotype SING). (Fig. 
1 , 2 ) 
Tree up to 9 m tall, diameter at breast height c. 20 cm, without buttresses. Bark papery, 
peeling, greyish brown. Branchlets glabrescent, green, prominently quadrangular 
and winged when young, becoming terete on older branches. Leaves purple when 
young, opposite and decussate on erect shoots, becoming secondarily distichous on 
lateral branches; blades narrowly elliptic to broadly linear, 60-105 x 14-25 cm, with 
hardly visible minute oil glands; margin entire; base cordate, apex long-acuminate; 
midrib and secondary veins on lower surface prominent, midrib flat and secondary 
veins sunken on upper surface; secondary veins 90-100 pairs, rather abruptly curving 
out from the midrib, intramarginal vein c. 2 mm from the leaf margin; glabrous on 
