Names and types of Bornean Hoya 
45 
Cultivated in USA, Hawaii, Oahu, Ka‘a‘awa, vouchered on unknown date as Green, 
T. s.n. (neotype BISH [BISH1016619], designated here). 
Notes : The holotype of Hoya lambii, Green 9905 is not present in BISH and no 
duplicates have been located in other herbaria. A specimen labelled as neotype is 
present in BISH ( Green s.n.) suggesting that the publishing author may be aware that 
the holotype is missing. However, the neotypification has not been published and is 
therefore formally published here. 
Hoya lasiantha (Korth. exBlume) Miq., FI. Ned. Ind. 2: 526 (1857) [20 August 1857]; 
Rintz, Malayan Nat. J. 30: 498 (1978). - Plocostemma lasianthum Korth ex Blume, 
Mus. Bot. 1(4): 60 (1849). - TYPE: Borneo, [ad montem Pamotton insulae Borneo] 
s.d., Korthals, P. s.n. (lectotype U [U1102625] designated here); Mus. Bot. 1(4) Fig. 
14 (1849) (epitype, designated here). 
Notes. The name Hoya lasiantha is usually attributed to Blume (1849: 30) [late 
October 1849] (Stafleu & Cowan, 1976) where it is, however, a nomen nudum as it 
refers only to a specimen labelled Hoya lasiantha in Korthals herbarium. The taxon is 
validated as Plocostemma lasianthum Korth. ex Blume (Blume 1849: 60) [November 
1849] (Stafleu & Cowan, 1976) and later transferred to Hoya by Miquel (1857). The 
authorship of the name is here corrected. 
Blume mentioned a collection in Korthals herbarium from Borneo ‘ad montem 
Pamotton insulae Borneo’. I have located a single specimen matching Blume’s 
description and illustration (Blume, 1849: Fig. 14) with a manuscript annotation by 
Korthals ‘ Hoya lasiantha Borneo’ in L (formerly in U). The label does not have further 
details on the collection locality, but this is common with Korthals specimens (Van 
Steenis-Kruseman, 1950). The specimen is only a fragment with a single mounted 
flower. It is possible that an original complete specimen was in L but may have gone 
missing, or that Korthal’s label may have been mixed during Miquel’s time (Van 
Steenis-Kruseman, 1950), therefore the U specimen is the only available original 
material for lectotypifying Hoya lasiantha. To aid in the application of the name the 
detailed illustration in Blume (1849, Fig. 14) is selected as epitype. 
Hoya latifolia G.Don, Gen. Hist. 4: 127 (1837); Rintz, Malayan Nat. J. 30: 508 (1978). 
- Hoya macrophylla Wight, Contr. Bot. India 38 (1834), non Hoya macrophylla 
Blume (1826). - TYPE: Malaysia, Penang, Wall. Asclep. no. 138[A = Wall. Cat 
8161A (lectotype K [K000895124], designated here) ex parte; isolectotypes CGE (1 
not mixed, 1 ex parte , E [E00179576], K [K000895125]. 
Notes. A suitable lectotype for Hoya latifolia G.Don can be selected from amongst 
material of the two syntypes indicated in the protologue (Wall. Asclep. no. 138[A 
= Wall. Cat 8161 A] and Wall. Asclep. no. 138[B = Wall. Cat 816IB]). Original 
specimens have been found at CGE, E and K. The one here selected as lectotype is 
the only one bearing a Herbarium Robert Wight Proper (HRWP) label indicating that 
it was one of the specimens studied by Wight and on which he based his descriptions 
