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Ganl. Bull. Singapore 70 (Suppl. 1) 2018 
a resemblance except for the leaflet margins that are frequently incurved, terminal 
buds that are not covered in resin, and petiolules that do not dry black at either ends. 
The specimen was later re-determined as Dacryodes incurvata by K.M. Kochummen. 
We collected one specimen from one of our plots. 
3. Melanochyla angustifolia Hook.f. (Anacardiaceae) 
This species was also recently collected from the back of the Seletar Range near Old 
Upper Thomson Road (Ali s.n., 1 Mar 2003 [SING0052434]), which is the eastern 
side of the Nee Soon catchment. Distinguishable when dried due to a grooved midrib 
on the underside and wrinkled petiole. The lamina base is cuneate and the leaves are 
well-spaced and not clustered. 
We also collected and identified two varieties that are new to Singapore: 
Knema curtisii (King) Warb. var. curtisii (Myristiceae), which was reported by Lim 
et al. (2016), and Syzygium claviflorum (Roxb.) Wall, ex A.M.Cowan & Cowan var. 
maingayi (Duthie) Chantar. & J.Parn. (Myrtaceae). Syzygium claviflorum var. maingayi 
can be distinguished from the typical variety by its four-angled and winged twigs 
(Kochummen, 1978b). 
Floristics 
By the end of the project, we identified 671 species (or sub-specific taxa, referred 
to here as ‘species’ for ease of presentation; Table 4), of which almost all are native 
(98.4%), and most have been assigned a nationally threatened status (i.e., Nationally 
Vulnerable, Endangered or Critically Endangered; 72.5%). This does not include 
the rediscoveries or new records which would require new national conservation 
assessments. The latter also includes two species which require new assessments due 
to a recent clarification in their identification ( Trichosanthes elmeri Merr. had been 
previously identified as Trichosanthes celebica Cogn.; de Wilde & Duyfjes, 2010) or 
taxonomy ( Utania volubilis (Wall.) Sugumaran; Sugumaran & Wong, 2014). Slightly 
fewer than half (43.1%) of the species are trees represented by at least one stem > 5 cm 
DBH, with similar percentages in the various status categories (Table 4). 
The species are from 117 families. While the distribution of species among 
families in the Nee Soon catchment generally reflects that of the extant Singapore flora 
(Chong et al., 2011) and especially the forest flora (Turner, 1994), the Myristicaceae is 
especially well-represented, with 25 species recorded out of the 36 species considered 
to be native to Singapore (Chong et al., 2009; Lim et al., 2016), of which 22 species 
occurred within our 40 plots (Table 5). Sixty families are represented by at least one 
stem > 5 cm DBH, and Gynotroches axillaris Blume (Rhizophoraceae) is the most 
abundant tree species in terms of stem counts, followed by Baccaurea bracteata Mull. 
Arg. (Phyllanthaceae) and Oncosperma horridum (Griff.) Scheff. (Arecaceae). 
