Hoya of Papuasia I. 
131 
Climber or spreading lax shrub or climber; presence of latex unknown. Stems 
cylindrical, 1.5—4 mm in diameter, hirsute, older stems leafless, glabrous; internodes 
2-5 cm long. Leaves petiolate; petiole terete, channelled above, 3-5 x c. 1 mm in 
diameter, sparsely hirsute below, lamina narrowly elliptic, coriaceous when dry, 
(5-)7-10 x 1.7-3.5 cm, puberulous on the abaxial surface, adaxial surface glabrous, 
older leaves glabrous, apex caudate, base acute; venation pinnate, midrib depressed on 
adaxial surface, raised on adaxial surface, secondary veins 4-7 each side, anastomosing 
near the leaf margin, branching from the midrib at c. 60°; leaf colleters not present 
on dry specimens. Inflorescences single-flowered, peduncle extra axillary, perennial, 
terete, 1.5-3 mm x c. 1 mm, older peduncles bearing overlapping scars from previous 
flowerings forming a short rachis, glabrous or sparsely pubescent; pedicels terete, 
1.5-2 cm x c. 0.5 mm in diameter, glabrous. Flower buds conical, with five basal 
humps in line with the corolla lobe sinuses. Calyx c. 2 mm in diameter, calyx lobes 
triangular, c. 0.5 x 1 mm, apex acute, glabrous with basal lanceolate colleters, c. 50 pm 
long. Corolla probably spreading (not possible to verity on herbarium material alone), 
1.5-2 cm in diameter, tube 2-2.5 mm, lobes narrowly lanceolate, 0.7—10 x 2.5-3 mm, 
pubescent inside, glabrous outside, apex acuminate. Corona staminal, stipitate, stipe 
elongated conical-truncate, c. 2 mm high, c. 1 mm wide at base, tapering to c. 0.6 mm 
at apex; corona c. 2.5 mm high, c. 2.7 mm in diameter, fleshy; corona lobes carinate, 
the inner half attached at the back of the anthers, the outer half free, c. 2 x 0.5 mm, 
inner processes acute, slightly bilobed at the tip, outer processes truncate, lacking 
basal revolute margins. Style-head linear with round apex extending above the corona 
lobes and anther appendages, 2-3 mm long. Pollinia ovoid, c. 250 x 180 pm, without 
sterile edge, corpusculum ovoid, c. 120 x 70 pm, caudicles attached at the base of 
corpusculum, thin and narrow, c. 100 x 15 pm. Ovary linear, 1.5-2 mm long, glabrous. 
Fruits linear, 15-20 cm long. 
Distribution. Recorded from a single locality in Papua Province, Indonesia. 
Etymology. Named after its elongated style-head that resembles the traditional koteka, 
or penis-gourd traditionally worn by male natives of New Guinea. 
Habitat and ecology. Unknown. 
Provisional IUCN conservation assessment. Data deficient (IUCN, 2016) as it is 
known only from the type specimen collected 110 years ago. 
Notes. Hoy a koteka is similar to Hoya multiflora Blume in the vegetative morphology, 
as it appears to be a non-climbing epiphyte with thin leaves and lacks basal lamina 
colleters. The general flower morphology is also rather similar as the corolla has 
lanceolate lobes and the corona is stalked with elongated corona lobes. The flowers, 
however, are much smaller in Hoya koteka (corona c. 2.5 mm high, c. 2.7 mm in 
diameter in Hoya koteka vs. > 5 mm high and > 7 mm in diameter in H. multiflora ) and 
