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Urban Forestry Terms
Urban Forestry Test Terms
| Question | Answer |
|---|---|
| Cultivar | cultured variety of a plant reproduced with human assistance |
| classification name that follows the genus name in a scientific nomenclature | Specific Ephithet |
| Family | taxonomic group under the order level and above genus level |
| practice and study of the care of trees and other woody plants in the landscape | Aboriculture |
| Scion | Top part of a graft, with leaves and buds that is grafter to the root stock |
| severe drying out, hydration | Dessication |
| Callus | undifferentiated tissue formed by the cambrium, usually as a result of wounding |
| small pores, between 2 guard cells on the undersides of leaves and green plants, gases exchanged and H2O regulated | Stomata |
| Ramet | freshly grafted tree (scion and attached root system) |
| CODIT | natural defense process in trees by which chemical and physical boundaries are created that act to limit the spread of disease and decay organisms |
| Flush Cut | pruning cut through and/removing the branch collar, causing unneccessary injury to the trunk/parent stem |
| lignified, differentiated tissues produced on woody plants, a response to wounding | Wound wood |
| parenchyma tissues that extend radially across the xylem and phloem of a tree and function in transport, storage and structure | Rays |
| Scaffold Limb | permanent/structural branches that form the scaffold architecture |
| Plant Hardiness | described plants ability to survive adverse growing conditions, ability to tolerate heat, cold, drought |
| seperation of wood at growth rings/rays, usually along barrier zone that forms on the CODIT | Shake |
| Dioecious | species of plants in which male and female flowers are on seperate plants |
| species with male and female flowers are on the same plant | Monoecious |
| Whorl | leaves, twigs/branches arranged in a circle around a point on the stem |
| Topping | inappropriate pruning technique to reduce tree crown size |
| Subordination | prune to reduce the size and ensuing growth of a branch in related to other branches/leaders |
| wood formed in leaning/crook stem/on lower or upperside of branches as a means of counteracting effect of gravity | Reaction Wood |
| Angiosperm | plant with seeds bourne in an overy, 2 large groups: monocotyledons and diocotyledon |
| plants with exposed seeds,cones | Gymonsperm |
| structural support, outside, nutrients up | Xylem |
| Phloem | inside, transports photosynthesis |
| thin walled, living cells essential in photosynthesis, energy storage, protective | Parenchyma cell |
| Branch bark ridge | raised strip of bark at the top of a branch union, where growth push bark into a ridge |
| Epicormic branching | shoot arising from a latent/advenitious buds |
| process of pretreating seeds to simulate natural winter conditions. Seed species undergo an embryonic dormancy phase | Stratified |
| seed leaf, first leaves to form in an embryo | Cotyledon |
| Genotype | genetic makeup of a cell, organism, individual |
| Epigeal germination | hypocotyl elongates, forms a hook, pulling the cotyledons and aprical meristem through soil |
| bark that becomes embedded in a crotch | Included Bark |
| Biomechanics | applies the principles of mechanical design to biological structures |
| reaction wood that develops on the underside of branches/leaning trunks | Compression Wood |
| Tension Wood | in broad leaved trees, reaction wood that forms on the upperside of branches/leaning trunks |
| abnormal condition that impairs the performance of one/more vital functions | Disorder |
| Drip Line | imaginary line defined by the branch spread of a single plant/group of plants |
| physical evidence of a casual agent | Sign |
| Symptom | plant reactions to a disease/disorder |
| Auxin | plant hormone/substrate that regulates the growth and development of plants |
| area of soil around a tree where majority of roots are, provide stability, determined by drip line/dbh | Critical Root Zone |
| Chlorophyll | green pigment found in plants found on chloroplasts. Capture energy of the sun and essential for photosynthesis |
Created by:
mim1989
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