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Ganl. Bull. Singapore 70 (Suppl. 1) 2018 
lamina with conspicuous glandular pits or dots visible on both sides and slightly crenate 
margins. It is endemic to Peninsular Malaysia and Singapore (Kochummen, 1978b). 
10. Trigoniastrum hypoleucum Miq. (Trigoniaceae) 
This species was most recently collected from Bukit Timah Nature Reserve ( Khoo 
KMS 105, 17 Jul 2009), as were previous collections {Ngadiman SFN 36148, 21 May 
1940; Ngadiman 34965 , 5 May 1938; Ridley 10379, 1899). The sole member of its 
genus, this species is recognised by its simple, alternate leaves, which have whitish 
lower lamina surfaces owing to a spiderweb-like covering of appressed hairs, and 
distinct, finely-reticulate venation. Also diagnostic are the minute impressed glands 
that line and thicken the lamina margins and apex. Trigoniastrum hypoleucum is 
also found in lowland rainforests in Peninsular Malaysia, Borneo, and Sumatra (Van 
Steenis, 1949: 58-60). 
11. Uvaria curtisii King (Annonaceae) 
This species was most recently collected from multiple localities: Upper Peirce 
Reservoir ( Gwee SING 2009-461, 17 Nov 2009; SING 2010-127, 19 Jan 2010), 
MacRitchie Reservoir ( Gwee SING 2009-602, 15 Dec 2009), and Bukit Timah ( Gwee 
SING 2010-097, 5 Jan 2010). Prior to this, it was collected in Bukit Timah (, Sinclair SF 
39652, 27 May 1953). The oblong or oblanceolate laminas of this large woody climber 
are covered with soft, rusty-brown, stellate hairs usually 0.5 mm (and not more than 1 
mm) long. Uvaria curtisii is otherwise known only from Peninsular Malaysia (Sinclair, 
1955: 206-207.) 
12. Uvaria lobbiana Hook.f. & Thomson (Annonaceae) 
A recent collection of this species was made from the Nee Soon forest (. Lua SING 
2011-237, 22 Jun 2011). Prior to this, it was last collected from the Singapore Botanic 
Gardens’ Jungle {Ridley 9211, 1898). Uvaria lobbiana is a large woody climber with 
red flowers. Its oblong or oblanceolate laminas have a slightly emarginate base, and are 
glabrous above with sparse stellate hairs below. Uvaria lobbiana is otherwise known 
from Myanmar, Thailand, Peninsular Malaysia, Sumatra, and Borneo (Sinclair, 1955: 
208-210; Turner, 2012). 
We also encountered Elaeocarpus griffithii (Wight) A. Gray (Elaeocarpaceae) which 
was also presumed Nationally Extinct in the Singapore Red Data Book. However, 
there are relatively recent collections from Nee Soon ( Nura et al. NK 207, 26 Jan 1995; 
NK 227, 26 Feb 1995) that were previously overlooked because the species name for 
these specimens in the database utilised during the listing exercise was “Elaeocarpus 
stipularis ”. Hence this should be considered more as an error of the listing rather 
than a true rediscovery (see Chong et al., 2012). Like the more common Elaeocarpus 
petiolatus (Jack) Wall., the apical shoot tips are coated with resin; however, the 
underside of the dried leaf lamina is not visibly covered with scattered black dots, 
and the tertiary venation is densely transverse to the midrib, forming rows of neat 
cells. Corner (1988) also cautioned that it could be easily confused with Elaeocarpus 
