34 
Card. Bull. Singapore 69(1) 2017 
Materials and methods 
The list published here includes accepted names, indicated in bold, of all species 
occurring in Borneo following the guide book checklist by Lamb & Rodda (2016: 
193-197). All taxa are listed regardless of where the type was collected. Under each 
accepted name all known synonyms are listed, again regardless of where the type 
was collected. The protologue of each name has been examined to establish which 
original materials were listed and needed to be located. Literature was obtained on the 
Biodiversity Heritage Library website [http://www.biodiversitylibrary.org], JSTOR 
[http://www.jstor.org/] and in the libraries of the Singapore Botanic Gardens, Royal 
Botanic Gardens Kew and Royal Botanic Garden Edinburgh. 
Types have been located in person or via loans at A, BISH, BM, BO, BRUN, 
CGE, E, FI, G, HITBC, HN, IBSC, K, KEP, KUN, L, OXF, P, SAN, SAR, SING, SNP, 
TO, UC, US, VN, WRSL, Z and on JSTOR Global Plants (https://plants.jstor.org/ 
accessed on 28 July 2016). 
If a suitable specimen is available, a lectotype is selected for names where the 
protologue does not explicitly mention a single type specimen with a direct reference 
to the institution in which it was deposited, strictly applying Art 9.1 & 9.2 of the 
ICN (McNeill et al., 2012). A reference to a single specimen indicated as ‘type’ or 
‘holotype’ in treatments published before 1 January 2001 is considered as effective 
lectotypification under Art. 9.9 of the ICN (McNeill et al., 2012). Schlechter’s 
specimens in B are usually considered to be holotypes (Nicholas, 1992). However, 
for Hoya names this is incorrect under ICN Art. 9.1 (McNeill et al., 2012), as the 
herbarium where the specimens are deposited is not clearly indicated by Schlechter 
and it cannot be ascertained that only a single specimen of the type collection was 
consulted. I have therefore selected lectotypes whenever original material could be 
located. 
Noltie (2005) clarified the type citations of taxa published by Wight. His 
notation of types is followed here. When based on specimens from Wallich the sheets 
usually bear a Wallich Asclepiadaceae number (Noltie, 2005), a number assigned to 
sheets given to Wight from Wallich before Wallich numbers were assigned. These 
sheets, listed in Linnean Society Manuscript SP1284 became part of Wight’s personal 
working herbarium and bear an HRWP (Herbarium Robert Wight Proper) label and 
may also bear a Wight number that is often a species number, an ‘Asclep’ number and 
the later assigned Wallich number. Sheets from Wight’s personal working herbarium 
are to be considered as Wight’s ‘top set’ (Noltie, 2005: 133), they are often annotated 
by Wight himself and may have pencilled sketches of the flowers. These specimens 
are here preferred over other duplicates in the selection of lectotypes. For taxa where 
a single sheet of a taxon was mentioned in Linn Soc Mss SP1284, if the sheet is extant 
and can be easily identified, it is considered a holotype. 
