Hoya of Papuasia I. 
Ill 
Additional specimens examined. PAPUA NEW GUINEA: Central Province: Boridi, 10 
Oct 1935, Carr, C.E. 13084 (BM, SING [SING0121812]); Boridi, 2 Nov 1935, Carr, C.E. 
14768 (BM, SING [SING0121815]); Boridi, 25 Nov 1935, Carr, C.E. 13500 (BM, SING 
[SING0121814]); Oro Province: Isuarava, 3 Feb 1936, Carr, C.E. 15366 (BM, SING 
[SING0121813, SING0121816, SING0121817]); Eastern Highlands Province: Obura- 
Wonenara, Baira, 25 Jan 2013, Simonsson Juhonewe, N & Juhonewe, F. NS0066H (LAE, 
SING) (living accession NS 13-065); Obura-Wonenara, Kamanangkera, 27 Nov 2013, 
Simonsson Juhonewe, N., Juhonewe, F. & ApaApako NS0079H (LAE) (living accession NS 13- 
092); Obura-Wonenara, Kamanangkera, 27 Nov 2013, Simonsson Juhonewe, N., Juhonewe, F. 
& Apa Apako NS0078H (LAE) (living accession NS 13-093); cultivated plant grown on from 
Obura-Wonenara, Baira, living accession NS 13-064, vouchered at Ukarumpa on 14 Jan 2016 
as Simonsson Juhonewe, N & Juhonewe, F. NS0097L (LAE). 
Notes. A montane species not easily confused vegetatively with any other Hoya spp. 
due to its unusual thick leaves. Amongst other known New Guinean species it most 
resembles Hoya solaniflora but the stems are more vigorous and robust, the lamina 
is larger and very thick (often 1.5-3 mm) and usually breaks easily if bent, and the 
flowers are c. 3 cm in diameter when flattened, whereas H. solaniflora is a more slender 
vine, having laminae 0.5-1.5 mm thick, and the flowers are c. 2 cm in diameter when 
flattened. 
The taxon was long recognised as a new species by Paul Forster and David 
Liddle and the type specimen Carr, C.E. 15904 was already labelled as such by them. 
Hoya edholmiana Simonsson & Rodda, sp. nov. 
Similar to the species in the Hoya ischnopus (Warb.) Schltr. species complex (which 
includes H. dimorpha F.M.Bailey, H. dischorensis Schltr., H. flavescens Schltr., H. 
kenejiana Schltr. and H. montana Schltr.) in having numerous flowers bearing yellow 
densely pubescent rotate corollas on slender peduncles, but easily distinguished by the 
conspicuous bright, raised venation which is lacking in the Hoya ischnopus complex 
and the corollas being slightly campanulate with grooves under each corona lobe and 
1.5 to 2 times the size of the corolla in the Hoya ischnopus complex (measured flat). 
- TYPE: Papua New Guinea, Morobe Province, Skindiwai, Kuper Range, 21 km E of 
Wau, 7°19'S 146°55'E, 1600 m, Nothofagus forest, 24 November 1981, Kairo, A. 405 
(holotype LAE). (Fig. 8, 9) 
Slender liana with white latex in all vegetative parts. Stems cylindrical, 1.5-3 
mm in diameter, greyish green to dark purple, glabrous; older stems often leafless, 
lignified, up to 5 mm in diameter, grey-brown, with peeling bark; internodes 3-20 cm 
long. Adventitious roots numerous along the stem. Leaves petiolate; petiole terete, 
1.5-2 x c. 1.2 mm in diameter, greyish green, glabrous; lamina ovate-elliptic, thin, 
coriaceous, 5-12 x 2-5 cm, dark green to purplish on adaxial surface, light green on 
abaxial surface, glabrous, apex cuspidate to caudate, base round to acuminate, margin 
entire, often undulate, slightly revolute; venation pinnate, midrib depressed on adaxial 
surface, secondary veins 4-6 each side, reticulate or inconspicuous, raised adaxially, 
much lighter in colour when young, anastomosing near the leaf margin, branching 
