38 
in certain parts by stretches of short *Pteridium aquilinum var. lanuginosum 
or *Gleichenia vulcanica, and in damper places dense mats of Centrolepis 
novo-guineensis. 
Associated with the Cladonia were clumps of °Riedelia montana var. 
arfakensis, and colonies of *Burmannia disticha and *Gahnia psittacorum, 
the latter dwarfed to °50 m. high. Patersonia novo-quineensis in full flower, 
the gleaming white or pale mauve corollas well exposed, was dotted in tufts 
all along the summit, a most interesting first record of a genus known from 
Kinabalu, Mt. Halcon in the Philippines, and Australia. 
A small example of the green °Platanthera elliptica was a remarkable find, 
the species alone being previously known from 8.W. New Guinea, while 
the two new varieties, so abundant in the moss-grown forest of the S.W. 
ridge and the small high mossy forest-patch by the lower lake, were not seen 
on the slopes of Koebré. Patches of the familiar °D). rhomboglossum and 
°D. fruticicola, both as conspicuous as on the marsh, with the magenta 
°“D. infractum, represented the terrestrial orchids in flower, with Glomera 
Gibbsew epiphytic on the upper branches of a wind-swept shrub. 
Didiseus koebrensis with many radiating stolons, near a species already 
collected on Mt. Scratchley in the S.E. supposed to be a variety of 
D. saniculefolius of Kinabalu and Mt. Halcon. Qldenlandia nutans var. 
alpinum was dwarfed to 50 m. “Myrmedoma arfakiana (P1. 8. fig. 6) with 
its slate-blue flowers the size of a shilling, showing all round the formless 
bristly stems, of which the fleshy consistency no doubt resists the fires, grew 
in solitary examples, one of which, about a metre in height, sent out a metre- 
long shoot from the apex at right angles to the main stem. 
Shrubs.—The exposed and wind-swept character of this summit plateau 
was shown in the shrubs, which either spread prostrate over the surface or 
were clipped back into small compact shapes. Hibbertia novo-guineensis, a 
plant with large flowers and spreading habit and very near to H. scandens 
of E. Australia, is the first species in this genus, hitherto known from 
Australia and New Caledonia, to be described for Malaya or New Guinea. 
The ever-present *Backea frutescens took on a prostrate form, Acronychia 
arfakensis, with insignificant white flowers and reddish fruit, was either pros- 
trate or erect, while Myrtus prostrata, with reddish stems and small coriaceous 
leaves, had developed quite dorsiventral shoots, resting on the ground. 
Small erect shrubs were *Henslowia umbellata with yellow foliage, 
Diplycosia Lilianee, and Vaccinium villosiflorum, while the dark green Tel- 
minthodia rotundifolia, the typical °Styphelia Gjellerupii, with white flowers 
and pink berries, and another Styphelia sp., of which the material was not 
sufficiently complete for identification, °Rhododendron angiense, Sericolea 
novo-guineensis with Psychotria vaccinioides, were of clipped compact habit. 
A couple of small trees of Dacrydium novo-guineense dwarfed to about 
4 m., with stiff, Araucaroid, ascending branches, bore many tiny ripe cones, 
re oe 
