128 
Hab. Arfak Mts., S.W. ridge running up to Angi lakes, in forest, 8000’. 
Fl. Dec. 5525. 
Dioicum, epiphytum. Ramuli spiciferi 1 mm. crassi, collenchyma libriforme in 
fasciculos discretos dispositum, fasciculi intramedullare, 1-seriati, canalis lysigenus 
unicus centralis. Limbi in sicco firmi fuscescentes et pellucido-punctulati, superi 
usque ad 5 cm. longi et 2°5 em. lati. Petioli usque ad 5 mm., pedunculi usque 
ad 8mm. longi. Spica matura 7 mm. longa, 4 mm. crassa, in sicco nigra. 
Piper prtosutiyopum C. DC., sp. nov. 
Ramulis tantum in nodis pilosulis, primum levibus postea lineatim lenticellatis ; 
foliis parvis modice petiolatis, limbo ovato-acuminato basi obtuso apice obtusiuscule 
et sat longe acuminato supra glabro subtus haud dense piloso, 5-nervio, petiolo 
piloso basi ima vaginante; pedunculo glabro quam petiolus breviore, spica florente 
quam limbus paullo breviore, rhachi hirsuta, bracteez glabra, pelta rotunda, 
staminibus 2, antheris tetragonis 4-valvatis. 
Hab. Arfak Mts., slopes of Koebré ridge between Angi lakes, 8000’. Fi. 
Dec. 5624. 
Dioicum, epiphytum. Ramuli spiciferi 1 mm. crassi, collenchyma libriforme 
in fasciculos discretos dispositum, fasciculi intramedullares 1-seriati, canalis lysi- 
genus unicus centralis, in ramulis 2 mm. crassis lineatum lenticellatis cellule 
sclerose circum collenchyma.: creberrime. Limbi in sicco subcoriacei fuscescentes 
et creberrime pellucido-punctulati usque ad 42 cm. longi et 2 cm. lati. Petioli 
circiter 5 mm., pedunculi 3 mm. longi. Spice florentes 3 cm. longe, 1 mm. 
crass, bractee pelta 0:75 mm. diam. 
FAGACES. 
Quercus LaurErBacui Seemen in Engl. Bot. Jahrb. xxiii. Beitr. lvii. 54 ; 
Schum. & Laut. 264, t. iv. figs. A-E. 
Arfak Mts., 8.W. ridge, 6000’. Fr. Dec. 6124. 
Distrib, New Guinea (D.S.W., Arfak Mts., 6000’, A. E. Pratt ; (Herb. 
Brit.) N.E.). 
A taJl tree with slender stem. Pratt’s collection consists of a single 
acorn, very striking in size, 6°5 cm. long, with cupule 6 cm. by 5 cm. and 
nut 4°5 em. long and about the same in breadth, enclosed in the cupule for 
1-5 cm. from the base. I came across the same group of irees on the exact 
spot kindly described to me by Mr. Pratt; the ground was strewn with 
acorns of all sizes, of which the one originally collected would represent the 
largest. The leaves are larger than in Seemen’s measurements, with the 
veins pilose on the under surface, but they were coliected from young 
plants. 
UrTicacEa. 
Prprurus PAPUANUS Gibbs, sp. nov. 
Arbuscula vel frutex: ramulis internodiis brevibus, cortice rugoso-lenticelloso ; 
innovationes tomentose. Folia parva, petiolata, lanceolata, sensim angustata, 
acuminata, basi obtusa, integerrima, leviter revoluta, rigide membranacea, supra 
