136 



connectivis apiculatis vel rarius obsoletis. Gynceceum syncarpium, uni- vel bi- 

 loculare, ovula solitaria, ab apice loculi pendula, anatropa ; stylus magnus, pilei- 

 formis. Arbores. Folia opposita vel alterna, coriacea nisi membranacea, penni- 

 nervia. Stipules 0. Flores saepius in racemos dispositi, parvi. 



TRIMENIA ARFAKENSIS Gibbs, sp. nov. 



Arbor parva, ramuli rigidi, subangulati, cortice cinerascente, leviter longi- 

 tudinaliter striato. Folia opposita, petiolata, ovato-lanceolata, acuta, basi in 

 petiolum attenuata, serrata, membranacea, supra nitidula, subtus minute glanduloso- 

 punctata. Inflorescentia pedunculata, axillaris, rufo-tomentosa, quam folia triple 

 brevior. Flores breviter pedicellati, plerumque hermaphroditi, receptaculo parvo, 

 hemispherico. Stamina 10-14, biseriata. Ovarium glandulosum, 1-ovulatum. 



Hab. Arfak Mts., edge of forest by ? lake, 7000'. Fl. Dec. 5743. 



Largest leaves 6 by 2 cm., drying cinnamon-brown ; the midrib 

 generally villous, impressed above and prominent below, red-brown, with 

 many transverse lateral veins. Petiole 6 mm., slender, villous, dark 

 brown. Racemes 1'5 mm. long (including the 5 mm. peduncle), of 3-4 

 pairs of flowers with a single terminal one. Flowers in bud, 4 mm. long, 

 consisting of many spirally imbricating, very caducous scales or perianth- 

 segments (15 were counted in one flower), 5-7 lower ones smaller and 

 strongly keeled, ciliate on margins, the upper larger, petaloid (white), 

 entire. Pedicels 1 mm. Stamens 13 (in one flower), 2'5 mm. in length, 

 with anthers 1 mm. and subulate filaments 1/5 mm. long, the inner series 

 shorter. Ovary 1*5 mm. long, while still enclosed in the perianth-segments, 

 when the immature stigma is grooved by the pressure of the inner series of 

 stamens on the papillae, forming vertical lines growing out later. The 

 papillae cover the stigma on maturity. After the fall of 'the perianth- 

 segtnents, the ovary is 2'5 mm. long. Receptacle minute, + '5 mm. 

 across. 



This plant is nearest T. papua-na Ridl., but differs in the rufous tomentum 

 on the young parts and inflorescence, in the non-acuminate, serrate, and 

 membranous leaves, and the small simple racemes. 



IDENBURGIA Gibbs, gen. nov. 



Flores hermaphroditi. Iteceptaculum parvum, bilaterale. Tepala 4, petaloidea, 

 2 -seriatim imbricata, decussata, subsequalia, caducissima. Stamina 6-9-10, pistillum 

 circumdantia post anthesin caduca, ad apicem receptaculi 1-2-seriatim affixa ; 

 filamenta libera, kta, crassa, brevissima, antherae pro rata magna?, adnatse, lineare- 

 oblongse, loculis parallelis, longitudinaliter dehiseentibus, connectivo piano vel 

 apice apiculato. Ovarium syncarpium, bicarpellatum, oblongum, biloculare, stigma 

 maximum, sessile, pileiforme, apice truncatum, carnosum, sicut ovarium filamentis 

 impressis longitrorsum rugatum ; ovula 2, in quoque loculo 1 ab apice pendulum, 

 anatropum. Fructus ignotus. Arbor vel arbuscula, glaberrima, folia alterna vel 

 opposita, petiolata, glanduloso-serrata, penninervia. Flores pedicellati, in racemos 

 terminales, breves, pauciflores dispositi. 



