  Range of Dacrydium xanthandrum (1). Adapted from a map by  www.expediamaps.com | Dacrydium xanthandrum Pilger 1938Common NamesSabah: kerapui, Dusun, Sensuron, seringoun, Bokan, Mt Alab, arun gunong, Atjeh.Taxonomic notesDescription"Shrub to tree, 2-36 m tall, up to 70 cm diam. Juvenile leaves spreading widely, bent slightly forward, linear-lanceolate, up to 2 cm long, 0.8 mm wide, strongly keeled on the dorsal side, slightly keeled and slightly convex on the axial side, about 0.2 mm thick, apiculate. Adult leaves spreading widely, straight or slightly bent forward but the tips still directed outwards, lanceolate to linear-lanceolate, 6-10 mm long or shorter at the base of the shoot, apiculate, strongly keeled on the dorsal side, slightly keeled and slightly concave on the axial side, 0.5-0.8 mm wide, 0.2 mm thick. Fertile stuctures both terminal and lateral. Pollen cone subtended by a cluster of reduced leaves which are c. 2 mm long, cone 5-13 mm long and 2-2.5 mm diam.; apex of the microsporophyll a lanceolate spur 0.6-1.2 mm long and 0.3 mm wide at the base. Seed-bearing structure subtended by a shoot up to 4 mm long with reduced leaves c. 2 mm long or when terminal sometimes following normal leaves; fertile bracts similar to leaves, spreading, 2-3 mm long; the shiny brown seeds c. 4 mm long, fully exposed, often in pairs" (1)."See comments under D. beccarii. The distinctly bifacially flattened leaves, generally concave on the axial surface, contrast strongly with the fine and distinctly more crowded leaves of D. beccarii. The difference is particularly noticeable on young plants. Fertile structures, like new shoots, are normally produced as is usual in the family after a period of rest but the examples of terminal seed-bearing structures without the usual subtending short shoot with reduced leaves apparently have appeared without the intervening rest period" (1). RangeSolomon Islands (Bougainville); New Guinea (incl. New Britain); Central E. Celebes; Philippines (Mindoro); Borneo (Sabah; Central Kalimantan: Bt. Raya; Sarawak: Mt Mulu, Mt Murud); N. Sumatra (Atjeh); Malaya. "Locally discontinuous... Locally common or even dominant and shrubby on mossy ridges with peaty soils over clay, sand, granite, sandstone, or dacite, or scattered larger individuals in nearby primary forest from (500-) 1000-2700 m" (1).Big TreeOldestDendrochronologyEthnobotanyObservationsRemarksCitations(1) Silba 1986.See also: |
[Dacrydium] [Podocarpaceae] [home] This page is from the Gymnosperm Database |