Arboriculture Glossary of Terms

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Category: All Categories Fungi Reference Terms in Hong Kong Tree Risk Assessment Tree Species

  • g

  • pointed. spur portion of a climbing spurs (see climbi11g spurs).
  • abnormal swelling of plant tissues caused by gall wasps. mites. nematodes. and various insects and less commonly by fungi or bacteria (contrast with burl).
  • complex of tunnels created by insects in plant tissues for feeding. reproduction. and sheltering. The pattern created by these galleries can sometimes be used for pest identification.
  • Various abnormal woody growths that occur on tree stems. branches. trunks. and roots
  • work organization tool in which project schedules are plotted in a bar chart.
  • Common Garcinia
  • mechanism to control the opening and closing of a connecting device (see carabiner and snap).
  • plural of genus (see gemts).
  • funds derived from local property taxes.
  • in entomology. a cohort of individuals _1_.. going through or having gone through a complete life cycle. Under favorable conditions. some pests can have more than one generation per year.
  • (pl. genera) taxonomic group. composed of species having similar fundamental traits. Botanical classification under the family level and above the specific epithet level.
  • taxonomic group. composed of species having similar fundamental traits. Botanical -! classification under the family level and above the species level.
  • synthetic fabric used in landscaping and in landscape or road construction applications as a barrier under mulch or pavement to reduce weed . germination and growth. as a filter to reduce infiltration of fine soil into drainage or aeration structures (including tiles or pipes). as a barrier to separate and prevent infiltration of fill or paving layers (e.g.. to prevent gravel paving from infiltrating a tree root zone). and/or to spread the load of a paving or fill layer and reduce(...)
  • restriction or destruction of the vascular xylem within a root. stem. or branch that causes inhibition of the flow of water and photosynthates in the phloem.
  • geographic information system
  • To give a smooth. glossy surface to a substrate
  • satellite navigation system that provides specially coded satellite signals that can be processed in a receiver. enabling the receiver to compute position; used in mapping locations.
  • global positioning system
  • phase of site development that provides a site with intended grades (contours. elevations. and slopes). Involves cutting and filling. See mass grading.
  • sheet of a complete set of development plans that depicts both original and finished (changed) grades. Essential information in developing tree conservation or preservation plans.
  • to join together tissues from the same or different plants in order to combine desirable characteristics or to effect a repair (bridge graft).
  • The point where the cut surfaces of two plants join to form a living union
  • junction between root stock and scion Wood. Often evident by a thickening of the trunk at the union.
  • Method of plant propagation by attaching a bud or a scion of one plant onto another plant. forming a living union
  • funds provided by an organization to an applicant for a project.
  • untreated waste water (as from sinks. baths. or washing machines) that does not contain human wastes (as from toilets) that can be used for landscape irrigation.
  • Good Rigging Control System
  • design practices that reduce or eliminate the negative environmental impacts of buildings. landscapes. or infrastructure.
  • living plants and natural materials within developed areas. Can be incorporated with gray infrastructure (utilities. paved surfaces. and buildings) to perform important ecological functions. such as stonnwater management. erosion control. temperature buffering. and more.
  • using materials. equipment. and procedures that conserve and protect natural resources. are energy efficient. and protect air and water quality.
  • mulch composed of green (rather than woody) organic matter and not fully composted or decomposed. Also cut or mowed herbaceous material (grasses. etc.) that are left to decompose naturally and improve the underlying soil quality.
  • plantings designed for tops of structures that increase the urban forest canopy.
  • rise in temperature caused by gases or materials suspended in the atmosphere that trap energy from the sun.
  • Scarlet Grevillea
  • Silk Oak
  • in cabling. a mechanical device that grasps and holds a cable during installation.
  • l) 11. the earth's surface and everything beneath it. 2) 11. the grade or elevation of the surface of the earth. 3) 11. a path for an electrical current to reach the earth (earth. in British English). 4) v. to create a path for an electrical current to reach the earth (earth. in British English).
  • in a tree lightning protection system. a copper plate used to form a ground terminal in shallow soils.
  • a metal rod used in grounding a lightning protection system.
  • in a tree lightning protection system. a conductive plate or rod used to create a path to ground.
  • in an electric utility system. the clearance or distance between live or energized conductors and the ground. In the United States. these clearances are specified in the National Electrical Safety Code (NESC).
  • low-growing plants that require minimal maintenance. used in landscaping instead of turf or mulch.
  • electrically connected to the earth. providing a path for the flow of electricity to preventaccidental energizing.
  • 1) 11. the act of creating a path for an electrical current to reach the earth (earthing. in British English). 2) adj. having a path for an electrical current to reach the earth (earthing. in British English).
  • water naturally stored underground in aquifers or that flows through and saturates soil and rock. supplying springs and wells (see water table; contrast with surface water).
  • one or more materials. such as soil. peat moss. perlite. ground bark. or sand. in which plants are grown; especially in nursery production.
  • Longitudinal split in bark due to normal expansion of cambium and xylem (contrast with bark cracks); not considered a defect
  • speed at which something grows per unit of time.
  • rings of xylem that are visible in a cross section of the stem. branches. and roots of some trees. In temperate zones. the rings typically represent one year of growth and are sometimes referred to as annual rings.
  • pair of specialized cells that regulate the opening and closing of a stomate (see stomata) due to a change in water pressure within cells.

  • t

  • The Guidelines for Tree Risk Assessment and Management (TRAM) Arrangement serve to provide technical and performance guidance on tree risk assessment, management, monitoring and maintenance. The key objectives are to: (a) Maximise public safety (b) Establish sustainable tree care practices The Guidelines for TRAM Arrangement are based on international best practices with due consideration to the circumstances in Hong Kong. They should only be applied, supervised and endorsed by qualified(...)

  • g

  • exudation of sap or gum from the bark. often in response to disease or insect damage.
  • the installation of a steel cable or synthetic rope cabling system between a tree and an external anchor to provide supplemental support.
  • hydrated calcium sulfate. Sometimes recommended as a soil conditioner or a source of calcium.