The pollen cone is stiff, dense, cylindrical, and solitary; usually being found in the leaf axils. Pollen cone at anthesis 6Ã11 - 8Ã16 mm; basal bracts clasping the cone; microsporophylls with stalk not winged, anthers inserted near head. 2nd rev. Female cone of Agathis Female cone of Cycas globular spirally arranged and appear like a rosette appear on the short branches laterally present around the apex of the monopodial trunk of the female plant reach only up to 5 cm in length up to 30 cm in length 5. Queensland Kauri. These accounts appear to be based on fact and as a result the Forestry Department was forced to allow the logging of trees which would otherwise die and rot in the forest. There are two subspecies, distinguished by distribution and by pollen cone morphology: 1. The distribution of most taxa is confined to a relatively limited space within the vast archipelago reaching from Sumatra and the Philippines to New Zealand, that comprises the genus' range. Cause et al. Leaves small, ovate-lanceolate to lanceolate, 15Ã10 - 60Ã15 mm. A. robusta subsp. This limit was set at 22 feet girth. Male cones 20-50 mm long, stout, cylindrical, female cones globose 50-75 mm diam., cone-scales (carpidia) deciduous, at first broad but then gradually narrowing toward base, bearing one ovule per scale. Fertilisation of the seeds occurs by pollination, which may be driven by the same or another tree's pollen. Basal bracts of male cone forming a firm cupule narrower than cone base. The male (pollen) cones are narrow reddish brown and cylindrical, 2 to 3 inches in length and erect when held on the tree but curled â¦ Agathis or Qld Kauri can live for centuries, but did you know that they were logged for their straight timber too much so by 1922, the Forestry Branch reported: âOf kauri pine the â¦ The timber of this species has had a wide range of uses and more or less corresponds with those of Araucaria cunninghamii. Pollen cone with 2 of the basal bracts enlarged and leaf-like. Fully 80% of the genus has only been described in the years since 1900, so that Agathis could be described as the last major group of conifers to be discovered by modern botany. Only female cones produce seed, which are winged and get carried on the wind after they are released. Keys are provided by Whitmore (1980) and Farjon (2010). jemail("earlecj", "gmail", "com"); Branches horizontal or (when large) turning irregularly upward, leaving circular scars on the trunk after they fall. A. robusta ssp. A. dammara, on the other hand, stands for the first Agathis to attract European attention. Leaf micromorphology in Agathis and its taxonomic implications. Agathis robusta, Queensland Kauri, Tree, [Dammera robusta, Agathis palerstoni], San Marcos Growers. Lowland forests. Stairs carved into an ancient kauri trunk (Ancient Kauri Museum, Awanui, near Kaitaia, Northland, New Zealand) Gum from a â¦ Male (pollen) cones are cylindrical, 2-5 cm long and female (seed) cones are woody, globose, 8-10 cm thick. Nonetheless, the great tree named by Rumphius turned out to be the predominate tropical species of Agathis, and was soon being exploited for its timber and its resins throughout most of its range. Copyright CSIRO. In this research, two-years-old male and female off-shoots of cycad were separated from the adult male and female plants and were treated in natural conditions, uniformly. Male cones oblong, straight, ultimately 3-4 cm long, 10 Plant Common Name. Kauri is a Maori word, applied by that people to Agathis australis and generalized in modern usage to all species of Agathis (Boland et al. Pollen cone basal bracts to 10x30 mm, seed cone scales with a boss on the upper margin. The male and female cones are usually found on the same tree. Pollen cone 8Ã20-10Ã25mm at anthesis; cupule wider than cone base. nesophila occurs in New Guinea. Each of the densely packed scales (3.5-4.0 cm long and 4-4.5 cm wide) usually bears a single seed at its base. Pollen cone a flexuous cylinder 9Ã60 mm at anthesis. Agathis montana in habitat near the summit of Mt. (1998) and integrated molecular, morphological and fossil data by Escapa and Catalano (2013), evaluating relationships within the Araucariaceae as a whole. New Caledonia. Basal bracts forming a loose cupule, at least as wide as cone base except sometimes in. New Zealand. Sun, part shade, best in free draining soil, slow growing, may stay in the juvenile pyramidal shape for more than 50 years This shows a tree 15 cm diameter [C.J. Pollen cone at anthesis larger, 10Ã18-22 mm; basal bracts forming a loose shallow dish, full width of cone or projecting slightly; microsporophylls with broad papery wings extending 1-1.5 mm from head along stalk, anthers attached near the axial end of these wings. AGATHIS robusta. Cycas circinalis, a species endemic to India was the first cycad species to be described and was the type of the generic name, Cycas category. Female (seed) cones are globular, 8-13 cm across, and are borne on short woody stalks. Seed germination time 5 to 7 days. Altitudinal range in NEQ from near sea level to 1100 m. A characteristic tree of drier rain forest where other tree species experience difficulty in attaining large dimensions. Pollen cone 6Ã25-10Ã50 mm. Female and male cones are on different branches on the same tree. 1980. International Journal of Plant Science 154: 187-225. (2012). Pollen cone basal bracts to 4x20 mm; seed cone scales lacking a boss on the upper margin. ~ Male Kauri Cone pendant ~ 48mm tall (1.9 inches). Work to date has shown a fairly high level of agreement in regard to the total number of taxa (19 species), a situation largely due to the high degree of endemism in the genus, though there has been a long history of lumping or splitting around the most variable and widespread species, A. dammara. Kauri: a king among kings. Nearly mature female cone from an Agathis robusta tree in Yatton Park, New Zealand [C.J. Microsporophyll head large, 4-5 mm across at anthesis. The name of the genus comes from the Greek âá¼Î³Î±Î¸Î¯Ïâ (agathis) = ball, with reference to the shape of the female cones; the name of the species comes from the Indonesian one, dammar, of the resin exuded by the tree. Once the seeds are mature, the â¦ Whitmore, T. C. and C. N. Page. Pollen is shed from the cylindrical male cones whilw the more rounded female cones are pollinated by the wind and become scaly, red-brown cones â¦ In confirmation of species identity, the most important characters are those associated with the pollen cone. determination in cycad is possible only after maturity and cone formation. The 'Square Kauri', a large tree of Agathis australis in New Zealand. Pollen cone 6Ã12-10Ã60 mm. Stem completely lacking buttresses.