 Foliage on an ornamental specimen [C.J. Earle, May-1999]. |
Phyllocladus trichomanoides D. Don in Lambert 1832
Common NamesTanekaha (Maori) (1).Taxonomic notesSyn: P. rhomboidalis A. Rich. 1832 (2). "Hybrids have been suspected between P. glaucus and P. trichomanoides, but both species are polymorphic and their life histories have not been adequately worked out" (2).Description"Monoecious tree up to 20 m, trunk up to 1 m diameter; phylloclades alternate, pinnately arranged on whorled rhachides up to 3 dm long. Leaves of juveniles up to 2 cm long, narrow-linear, deciduous; of adults much smaller. Phylloclades 10-15 per rhachis, irregularly and broadly rhomboid, flabellately lobed, cuneate at base; lobes obtuse to truncate, margins minutely crenulate; leaf-denticles small, subulate, 1.5-3 mm long, up to 1.5 mm wide. Male strobili terminal in cluster of 5-10, pedicels 3-10 mm long; staminal portion ca. 1 cm long, apiculus small, triquetrous; carpidia rather thick, marginal on reduced final phylloclades up to 3 cm long, in clusters of 6-8; seeds nutlike, exserted beyond irregularly crenulate cupule, ca. 3 mm long" (2).RangeNew Zealand: N Cape (N Island) and northern Marlborough and Nelson districts, extending to nearly lat. 42° on west of the S Island; in lowland forest (1, 2).Big TreeOldestDendrochronologyFour tree-ring chronologies were collected in the early 1970s by the American Peter Dunwiddie in what was evidently the first exploration of the dendrochronological characteristics of the species (3, 4). Shortly thereafter, the Australians and New Zealanders began work in the area, assembling chronologies for a variety of native gymnosperms and successfully applying them to a variety of problems in work summarized by D.A. Norton, John Ogden and J.G. Palmer (5, 6). Since that time, it has become the most intensively used New Zealand species, used in dating an eruption of the volcano Taupo (7) and a variety of dendroclimatic studies (8, 9, 10).EthnobotanyObservationsRemarksSee also Paleobotany of Australia and New Zealand conifers.Citations(1) Silba 1986.(2) Allan 1961. (3) Chronologies can be found at the Tree-Ring Data Search Page. (4) Dunwiddie 1979. (5) Norton & Palmer 1992. (6) Palmer & Ogden 1992. (7) Sparks et al. 1995. (8) Palmer 1989. (9) Murphy & Palmer 1992. (10) Salinger et al. 1974. |
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