Hoya of Papuasia I. 
107 
rounded, sometimes slightly revolute, more evident on dry material, immature leaves 
often reddish-maroon, with 1 basal colleter, globose, 3-4 x 3M mm; venation pinnate, 
midrib depressed on adaxial surface, secondary veins 2-5 each side, light green and 
sometimes slightly elevated, anastomosing near the leaf margin, branching from the 
midrib at 40-90°. Inflorescences one per node, extra-axillary, positively geotropic, 
convex, consisting of (2-)6-12 flowers; peduncle terete, 1-6 cm x 1-2 mm, older 
peduncles forming a rachis from previous flowerings, glabrous or sparsely pubescent; 
pedicels terete, 2-A cm x c. 0.6 mm in diameter, pedicel reddish green. Flower buds 
apically flattened, cream-white, often red near the calyx. Calyx c. 6 mm in diameter, 
lobes elliptic-deltoid, c. 1.5 x 1.5-2 mm, apex rounded or acute, glabrous to sparsely 
pubescent; basal colleters one in each sepal sinus, round to deltoid. Corolla rotate, 
concave, c. 2.5 cm in diameter (c. 3 cm when flattened), pure white to cream-white with 
varying degree of crimson under the corona, often also visible on the outer surface; 
tube 5-6 mm long, lobes ovate, 0.7-1 x 0.7-1 cm, thickly pubescent inside, glabrous 
outside, margin recurved, apex acuminate, recurved. Corona staminal, c. 3 mm high, 
8-10 mm in diameter, fleshy, creamy yellow(-greenish); corona lobes 5, rhomboid 
when seen from above with ovate top and a central deep groove, 4-5 x c. 3 mm, inner 
processes flat to slightly erect, apex acuminate, outer processes flat to slightly erect, 
usually at same level as inner processes, not basally fused with the filament tube, 
with basal revolute margins. Style-head convex, hidden by anther appendages at same 
level or barely exceeding the apices of inner coronal processes. Pollinia oblong with 
sterile edge, c. 920 x 370 pm, corpusculum rhomboid, c. 500 x 300 pm, caudicles 
attached at the sides of corpusculum, c. 120-150 pm long. Ovary conical, often with a 
mammillate tip, c. 2 mm long; each carpel c. 1 mm wide at base, glabrous. Fruits and 
seeds not observed. 
Distribution. Carr collected Hoya carrii (Carr 13084, Carr 13500, Carr 14768 , 
Carr 15366 ) at two sites c. 15 km apart on the Kokoda Track along the border of 
Central and Oro Provinces, at c. 1370 m altitude (4500 ft.). Later, during the first 
author’s fieldwork, two populations were found 25 km apart, c. 340 km northwest of 
the type locality ( Simonsson Juhonewe & Juhonewe NS0066H , Simonsson Juhonewe 
& Juhonewe NS0078H, Simonsson Juhonewe & Juhonewe NS0079H, Simonsson 
Juhonewe & Juhonewe NS0097L ) in Obura-Wonenara, Eastern Highlands Province, 
at c. 1800 m altitude in mossy forests on ridges, flowering in January and November. 
The species seems to be uncommon, but where it is found it is locally abundant. 
Etymology. Named after C. E. Carr (1892-1936), who first collected the taxon in 
1935, and again in 1936, on a collecting expedition supported by the British Museum, 
London, which started in 1934. He died of malaria in June 1936, just a few months 
after discovering the second locality of Hoya carrii. 
Habitat and ecology. Found on ridges at 1400-1800 m, on mature trees or mossy 
undergrowth in primary forests. Not observed in nearby re-growth. In the wild and in 
cultivation in PNG it usually flowers during November - January. 
