Flora of Papua New Guinea 
Conservation International New Ireland RAP Survey 
10019 Araliaceae 
Osmoxylon novoguineense (Scheff.) Becc. 
New Ireland; near the junction of the Niagara and Weitin River (site 2); 
mature lowland rainforest, in or near transect 1; elev. 240 m, centered 
on coordinates 152 deg 56’ 242” E x 4 deg. 30.210’ S. 
with coll sequence starting Archidendron 9904; common monocaul 
along the Weitin River, c. 10 m straight-ascending stem, approx, 
isodiametric; leaves conferted, palmately lobed (cleft nearly to the 
petiole), coriaceous, glabrous, adaxial surface medium shining green x 
abaxially slightly lighter shiny green, blade segments to c. 70 cm long, 
margins pinnatisect; petiole nearly 50 cm length, base swollen and 
furnished with a series of transversal ridges, axis slightly flattened on 
the adaxial side; stipules prominent, green, forming an axillary ligule 
with 2 carinal crests, typically 4-5 cm long; leaf venation penninerved in 
each lobe, main veins conspicuous, reticulum mostly hidden; 
inflorescence terminal, umbellate through 3 orders, primary rays to 
approx. 35 cm long, inserted over the surface of a dilate and 
somewhat clavate pedestal, entirely glabrous; peduncle with a stipitate 
head of pseudofruits at its summit, each of the lateral branches 
ascending and ending in an umbellule of bisexual flowers, the lateral 
axes distinctly articulate about halfway up, pedicels to c. 15 mm. 
flowers bottled. 
coll: W. Takeuchi & J. Wiakabu 10019 
date: January 1994 
det.: WT 
Flora of Papua New Guinea 
Conservation International New Ireland RAP Survey 
10020 Adiantaceae 
Onychium siliculosum C. Chr. 
New Ireland; near the junction of Malmai Creek and the Weitin River; 
selectively logged lowland rainforest; elev. 150 m; centered around 152 
deg. 57.825’ E x4 deg. 33.271’ S (coll, site 1). 
common terrestrial on roadcut of logging access track; rhizome tufted, 
scales orange-brown, vasculature of 2 lateral bundles uniting upwards 
into an approx. U shape; stipe atropurpureous with 2 light green lines 
down the sides, terete becoming distally canaliculate; rachis green on 
upper surface, brown beneath; fronds pinnately decompound, 
subcoriaceous; lamina light green, underside covered with golden- 
brown spores. 
coll: W. Takeuchi & J. Wiakabu 10020 
date: January 1994 
det.: WT 
