Floristic value of Nee Soon swamp 
59 
polystachyus Wall, ex MiilLBerol., except that its leaves are generally glabrous and 
the margins are usually entire or sometimes slightly toothed (rather than hairy and 
crenate as in Elaeocarpus polystachyus). 
We also collected Alangium ridleyi King, Gynochthodes rigida (Miq.) Razafim. 
& B.Bremer (= Morinda rigida Miq.), and Willughbeia coriacea Wall., all of which 
were considered by Chong et al. (2012) to be erroneously extinct listings. Alangium 
ridleyi was later reassessed formally by Wijedasa et al. (2014) as Critically Endangered. 
In the case of Willughbeia coriacea , it was mistakenly considered a synonym of 
Willughbeia edulis Roxb. by Turner (1995), and subsequently presumed Nationally 
Extinct under this name. 
Additions to the flora of Singapore 
Securidaca philippinensis Chodat in the Polygalaceae (Tan et al., 2016), and 
Cryptocarya nitens (Blume) Koord. & Valeton and Lit sea resinosa Blume, both in 
the Lauraceae (Chong et al., 2016), have been recently reported as new or overlooked 
records for the flora of Singapore. We also encountered Hopea ferruginea Parijs 
(Dipterocarpaceae) and Sindora echinocalyx Prain (Fabaceae), which will be among 
the new or overlooked records for Singapore from Bukit Timah soon to be reported 
elsewhere (M.S. Khoo, S.C. Chua, personal communications); Aglaia erythrosperma 
Pannell (Meliaceae), which was already reported by Pannell (2013) for Singapore, 
\/ 
although not explicitly stated as a new record; and Hanguana neglecta Skornick. 
& Niissalo (Hanguanaceae), which was first reported for Singapore by Niissalo et 
V 
al. (2014). Leong-Skornickova & Boyce (2015) were subsequently able to locate 
Hanguana neglecta in MacRitchie and Bukit Timah but not Nee Soon, although Nee 
Soon is a historical locality based on re-determined past herbarium records. 
The following three additions to the flora of Singapore from our surveys in Nee 
Soon have not yet been reported: 
1. Aglaia yzermannii Boerl. & Koord. (Meliaceae) 
This is a small rheophytic tree to 5 m tall. The species is easily recognised by its 
slender twigs and petioles which are sparsely or densely covered in yellowish-brown 
stellate scales that appear as shiny coppery dots to the unaided eye, and 3-5 linear, 
linear-lanceolate or narrowly lanceolate leaflets which are sometimes irregularly 
curved. According to Pannell (2013: 155), this species “appears to be restricted to the 
banks of relatively deep stretches of otherwise stony, fast flowing rivers” in Peninsular 
Malaysia. However, our collections of this species were not made from such habitats 
in Nee Soon. 
2. Dacryodes incurvata (Engl.) H.J.Lam (Burseraceae) 
A small to medium-sized tree. It was once collected from Mandai Road (Kiah s.n., 29 
Jul 1940 [SING0053970]) and identified as Santiria laevigata Blume, to which it bears 
