Floristic value of Nee Soon swamp 
57 
5. Dioscorea stenomeriflora Prain & Burkill (Dioscoreaceae) 
According to Turner et al. (1994), one specimen was collected from the Central 
Catchment Nature Reserve near the west end of Upper Peirce Reservoir with the 
collection number NRS1632, but we are unable to trace this specimen. Otherwise, 
there is one collection from Changi (. Ridley s.n., Feb 1894 [SING0010181]). It is a left- 
twining climber, with oblong laminas up to 16 cm long, with sagittate bases in younger 
leaves. Secondary veins are distinct and widely spaced. 
6. Lindsaea repens (Bory) Thwaites var. pectinata (Blume) Mett. ex Kuhn 
(Lindsaeaceae) 
This was only collected once previously from Bukit Timah {Ridley s.n., 1893 
[SING0031423]). A low-climbing or epiphytic fern with long-creeping rhizomes, 
quadrangular rachis, and asymmetrical lamina. 
7. Syzygium glabratum (DC.) Veldkamp (Myrtaceae) 
The most recent collection of this species was from the Raffles College grounds (Md. 
Nur SFN 36293, 13 Jun 1939), but previous collections were all from MacRitchie 
Reservoir {Corner SFN 36291, 5 Jun 1939), or the Reservoir Jungle {Corner s.n., 
8 May 1936, [SING 0011827], Corner SFN 29225, 31 Mar 1935; Corner s.n., 20 
Apr 1933 [SING 0011825, SING 0011835]). It had previously been collected and 
listed for Singapore under various names: Eugenia fusiformis Duthie, Eugenia virens 
(Blume) Koord. & Valeton and Syzygium gracile (Korth.) Amshoff (see Turner, 1995; 
Veldkamp, 2003). Syzygium glabratum can be identified by well-spaced main lateral 
veins raised on both sides of the lamina, and extremely dense, minute, dark glandular 
pits or dots over the entire lower lamina surface, which are nested within the cells 
of the fine tertiary reticulations, visible even to the naked eye. It is an uncommon 
tree found from Singapore to Peninsular Malaysia, Borneo, Java, and the Philippines 
(Kochummen, 1978b; Ashton, 2011). 
8 . Syzygium leptostemon (Korth.) Merr. & L.M.Perry (Myrtaceae) 
This species was most recently collected from Bukit Timah {Ngadiman 34994, 15 Jun 
1938; Ridley 11324, 1903), and also from Ang Mo Kio {Ridley 25, Mar 1889). Syzygium 
leptostemon has large elliptic-obovate laminas with well-spaced main lateral veins 
that are raised on the underside of the lamina. The twigs are often angular, distinctly 
orange-brown (sometimes grey-brown), contrasting in colour with the leaves, which 
dry very dark. It is known to be locally common where it occurs, but favours wet 
environments such as floodplains, river banks, and swamp forest (Kochummen, 
1978b; Ashton, 2011). 
9. Syzygium pseudocrenulatum (M.R.Hend.) I.M.Turner (Myrtaceae) 
This species was most recently collected in Singapore from Mandai (Corner, 1978; 
Corner 28090, 25 Apr 1924) and also from an unspecified locality {Ridley 6232, 1894). 
Syzygium pseudocrenulatum is distinct in its thickly leathery, elliptic to oblong-elliptic 
