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  • Podocarpus sylvestris
    식물/들꽃-나한송과(Podocarpaceae) 2022. 11. 8. 15:26

    국표에 없다.

     

    Podocarpus sylvestris is a species of conifer in the family Podocarpaceae. It is found only in New Caledonia.

    Podocarpus sylvestris - Wikipedia

    Podocarpus sylvestris

    J. Buchholz 1949

    Syn. (Farjon 1998):

    • Podocarpus ensifolius R. Br. ex Carrière var. latifolius Carrière 1867;
    • Podocarpus novae-caledoniae Viell. var colliculatus N.E. Gray 1958;
    • Podocarpus colliculatus (N.E. Gray) de Laubenfels 2005 (regarded by some as a good species).

    Regarding P. colliculatus, Farjon (2010) says "Gray should have placed this taxon (as a variety) with P. sylvestris, from which it differs only slightly in having somewhat larger receptacles and longer peduncles ... the differences between P. colliculatus and P. sylvestris are minor and not constant in the specimens I have seen." The combination P. sylvestris var. colliculatus, however, has not yet been made.

    Description

    Trees to 20(-30) m tall and 80 cm dbh with spreading branches forming a broad crown, but at high altitudes shrubby, mostly 1.5-3 m tall. Bark brown, thin, more or less tesselated, on large trees becoming thick and fibrous, fissured longitudinally. Twigs round, finely grooved, with small, ovoid buds with 1-2 mm long, imbricate, appressed, obtuse scales. Juvenile plants bear leaves to 16 cm × 18 mm wide. On adult trees and shrubs leaves mostly 5-10 cm × 7-11 mm, coriaceous, straight or slightly curved, oval-linear (widest at midpoint) to linear, tapering to a petiolate base and an obtuse apex. Midrib prominent on adaxial (upper) side, 1-1.2 mm wide, flat on abaxial side. Leaves bright lustrous green above, dull light green below. Stomata in two bands on abaxial side. Pollen cones from clustered buds in axils of leaves or below these, sessile, in groups of 1-3, subtended by small, rounded, imbricate bud scales, cylindrical, 10-20 × 3 mm, yellow turning brown; microsporophylls imbricate, peltate, with erose-denticulate margins, minutely apiculate, bearing two basal, globose pollen sacs. Seed cones axillary and solitary on slender, 7-15 mm Iong peduncles; receptacle subtended by two small bracts, growing to 6-10 mm long, swelling to 5-6 mm thick, maturing to red or red-brown. Seeds including the epimatium relatively large, 10-15 × 7-9 mm, obliquely ovoid with a faint crest, smooth, olive green turning brown. Seed ovoid, smooth, ca. 9 × 6 mm (Farjon 2010).

    This species closely resembles P. lucienii, but that species has blunt bud scale tips, and mostly individual (rather than clustered) pendent pollen cones, and its bark lacks the reddish-brown color of P. sylvestris (de Laubenfels 1960). The leaves of P. lucienii are wider and terminate more abruptly at both ends, even on juvenile plants; the seeds are also larger, and the receptacles are on longer peduncles (Farjon 2010).

    Podocarpus sylvestris () description (conifers.org)

     

    https://youtu.be/QIV-K22eecI

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