Hoya of Papuasia I. 
119 
subsp. juhoneweana 
Pendulous epiphyte with white latex in all vegetative parts. Stems up to 5 m long, 
flexible, (horizontal) pendulous, cylindrical, 1—1.5 mm in diameter, green, pubescent 
with very stiff, spreading 0.5 mm or longer stiff hairs; older stems lignified, up to 
3 mm in diameter, greyish brown, often glabrous; internodes 3-6(-25) cm long. 
Adventitious roots scattered along the stems. Leaves pendulous, petiolate; petiole 
terete, 2-10 x 1-1.5 mm, green, covered with very stiff, erect, 1 mm or longer hairs; 
lamina elliptic-ovate, chartaceous, stiff and brittle when mature, 3-8 x 2-4 cm, bright 
green on adaxial surface, light green on abaxial surface, both surfaces covered by 
very stiff, erect, 1 mm or longer hairs, especially near base and abaxial midrib, apex 
cuspidate-caudate, base round to attenuate, margin entire and revolute; venation 
pinnate, midrib much depressed on adaxial surface, secondary veins 2-5 each side, 
evident and often depressed, giving the lamina a bullate appearance, anastomosing 
near the leaf margin, branching from the midrib at 45-80°; leaf colleters one pair at 
the lamina base, greyish white. Inflorescence one per node, extra-axillary, positively 
geotropic, pseudo-umbellate, consisting of 1-5 flowers; peduncle terete, 1-3 cm x 
c. 1 mm, older peduncles forming a rachis from previous flowerings, new peduncles 
hirsute, often almost glabrous in old peduncles; pedicels terete, c. 2 cm x c. 1 mm 
in diameter, light green, often spotted in purple near calyx, glabrous (sparsely 
pubescent). Flower buds globular with flattened apex, creamy white with pink and 
purple dots. Calyx c. 5 mm in diameter, calyx lobes ovate-lanceolate, c. 1 x 0.7 mm, 
apex acute, purple spotted. Corolla deeply campanulate, fleshy, 2.5-3 cm in diameter, 
cream coloured with a slightly greenish hue in centre fading to a pinkish hue on lobes 
penetrating from the outer surface; tube 1—1.5 cm long x 1.5-2 cm in diameter, lobes 
broadly triangular, c. 1 x 1.5 cm, thickly pubescent inside, usually almost glabrous 
near centre, outside glabrous, margins recurved, apex acute. Corona staminal, c. 5 
mm high, c. 9 mm in diameter, fleshy, cream coloured with a light green protruding 
style-head; lobes round from above, c. 3.5 x 3 mm, inner processes much reduced 
and linear, 0.5 x 0.2 mm, each outer process with a sharp central ridge and a basal 
longitudinal protrusion on each side running from the base of the guide rails up to 
the apex, with basal revolute margins right up to the apex. Style-head mamillate, 
higher than anther appendages. Pollinia oval, 400-500 x 280-320 pm, no sterile 
edge, retinaculum ovoid, 350^100 x c. 300 pm, caudicles attached at the base of 
retinaculum, broadly triangular, 100-150 x c. 100 pm. Ovary conical, c. 3 mm long, 
narrowing down at 2 mm from the base; each carpel c. 1.3 mm wide at base, light 
green, glabrous. Fruit and seed not observed. 
Distribution. Only found near the remote village of Hoboc at 1500-1800 m. Four 
individuals of Hoya juhoneweana ssp. juhoneweana were originally seen, of which 
two had disappeared when their locality was revisited for the last time in 2012 due 
to expanding subsistence gardens and degradation of the riverine forest by the local 
villagers. Hoya urniflora was collected at the same locality and is abundant there. 
