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Elmcare.Com - All About Elm Trees and Elm Tree Care Elmcare.com - All about elm trees and elm tree care. Home | Elm Care Products | Register your Elm | Forum Last Update 17/12/01 Customized Elm Tree Care Kits Did you know a new wild bird seed has been developed and tested that Custom care kits include actually repels squirrels? How Trees Work specialized and innovative soil Click here to learn about Squirrel Proof Wild Bird treatments designed to promote About Elm Trees Seed. root development and the long- Caring for Your Elm term health and vitality of your Elm Tree Diseases elm. A healthier elm will be better able to fight against Dutch elm disease. Elm Tree Links more Quick Elm Facts Elm Tree Registry Visit TreeHelp.com for all of your tree and shrub Register your elm tree to receive customized care care needs advice...more. Return of the Stately Elm Writer and broadcaster Jamie Swift examines the Canadian city of Winnipeg's struggle to combat Dutch elm disease. Through the work of community groups like the Coalition to Save the Elms and innovative technology, the city has achieved substantial success... more. http://www.elmcare.com/index.htm (1 of 2) [2/27/02 10:29:57 PM] Elmcare.com - All about elm trees and elm tree care. New Treatments for Elms in History Elm Tree Links Dutch Elm Disease? Look at elms in the context of Links to a growing community of Researchers examine new ways to human history. academics, homeowners and fight this devastating disease. professional tree care experts. Elms in Literature Elm Species Quick Elm Facts Read what some of the world's Elms come in many sizes and leading poets and authors have Discover something new and shapes...learn about them all. written of the elm. interesting about the elm. Thank you for visiting Elmcare.com! Site Map | About this site | Home Tree Registry | www.TreeHelp.com Copyright http://www.elmcare.com/index.htm (2 of 2) [2/27/02 10:29:57 PM] How Trees Work Home | Elm Care Products | Register your Elm | Forum Home > How Trees Work Last Update 30/08/00 What is a ring-porous vascular system? What is the difference between wild-type How Trees Work and cloned trees? Types of Trees Important Facts Structure of a Tree How Trees Breathe How Trees Drink Find the answers to these questions and About Elm Trees more by clicking on one of the topics below: Caring for Your Elm Elm Tree Diseases More Info... Elm Tree Links Important Facts Types of Trees Quick Elm Facts Structure of a Tree How Trees Drink How Trees Breathe Thank you for visiting Elmcare.com! Site Map | About this site | Home Tree Registry | www.TreeHelp.com Copyright http://www.elmcare.com/trees/how_trees_work.htm [2/27/02 10:30:02 PM] Types of Trees Home | Elm Care Products | Register your Elm | Forum Home > How Trees Work > Types of Trees Last Update 30/08/00 Angiosperms vs. Gymnosperms How Trees Work Trees are scientifically divided into two major categories: angiosperms and gymnosperms. Types of Trees Important Facts Angiosperms are flowering plants and their seeds are encased in a protective Structure of a Tree ovary. This division contains the larger number of species can be further How Trees Breathe subdivided into dicots and monocots. Dicots have two seed leaf structures and How Trees Drink include many broadleaf trees such as the elm, maple and oak. Monocots have one seed leaf structure and include species such as the palm. About Elm Trees Caring for Your Elm Gymnosperms, on the other hand, do not produce flowers. Their seeds have Elm Tree Diseases structures such as cones, rather than a protective ovary. Conifers (needle-leaf Elm Tree Links trees) are a major group of gymnosperms. Quick Elm Facts Deciduous vs. Coniferous Trees can also be divided into deciduous and coniferous categories. Deciduous trees are also known as broadleaf trees because the leaves are generally larger and wider than those of conifers. The larger leaf size means a greater surface area for photosynthesis, but it also mean the leaf is too fragile to withstand winter conditions. Therefore, most deciduous trees drop their leaves in autumn. Coniferous trees keep their leaves throughout the year, shedding only the oldest leaves. Usually these leaves are lower down on the tree and do not receive as much sunlight as newly developed leaves higher up. Some of the best-known members of the conifer family are pines, spruces, firs, and hemlocks. The cones of the conifers are its flowers. http://www.elmcare.com/trees/types_of_trees.htm (1 of 2) [2/27/02 10:30:04 PM] Types of Trees Thank you for visiting Elmcare.com! Site Map | About this site | Home Tree Registry | www.TreeHelp.com Copyright http://www.elmcare.com/trees/types_of_trees.htm (2 of 2) [2/27/02 10:30:04 PM] Important Facts About Trees Home | Elm Care Products | Register your Elm | Forum Home > How Trees Work > Important Facts Last Update 30/08/00 Some trees are wild, others are cloned How Trees Work It's easy to think that all trees of a species are alike. This is only true, however, of certain species. Most trees are wild-type trees, meaning that their genetic make- Types of Trees ups are as dissimilar as individual humans. An example of a wild-type is an elm. Important Facts Structure of a Tree How Trees Breathe Other trees have been cloned to produce many trees with identical genes. This is How Trees Drink usually done to guarantee the presence of certain favourable characteristics of the tree. Examples include apple and pear trees. About Elm Trees This distinction is important when treating diseases. In a wild-type tree, each tree Caring for Your Elm will react differently. Elm Tree Diseases Elm Tree Links Quick Elm Facts Some trees are ring-porous, some are diffuse-porous Trees can be divided into ring-porous or diffuse-porous types. This refers to the structure of the vascular system. The vascular system of diffuse-porous trees (such as a birch) is characterized by vessels spread evenly throughout the sapwood. These vessels are Diffuse-Porous produced regularly during the growing season. http://www.elmcare.com/trees/important_facts.htm (1 of 2) [2/27/02 10:30:07 PM] Important Facts About Trees The vessels of a ring-porous tree (such as an elm) are generally larger and concentrated in the outermost layer Ring-Porous of sapwood. These vessels are produced early in the season. This is significant because it affects a tree's susceptibility to vascular wilt diseases. Ring-porous vascular systems are very efficient, but are much more vulnerable to blockage. The elm's vulnerability to Dutch elm disease is an case in point. Thank you for visiting Elmcare.com! Site Map | About this site | Home Tree Registry | www.TreeHelp.com Copyright http://www.elmcare.com/trees/important_facts.htm (2 of 2) [2/27/02 10:30:07 PM] Structures of Trees Home | Elm Care Products | Register your Elm | Forum Home > How Trees Work > Structure of a Tree Last Update 30/08/00 How Trees Work Leaves Types of Trees Important Facts The leaves convert carbon dioxide into oxygen and provide the Structure of a Tree tree with energy to grow and fight disease...more. How Trees Breathe How Trees Drink Roots About Elm Trees The roots provide structural stability to the tree and are the means by which it Caring for Your Elm takes up water and minerals...more. Elm Tree Diseases Elm Tree Links Bark Quick Elm Facts Bark is the outer protective covering of tree trunks. The form and structure of bark can differ greatly from tree to tree...more. Thank you for visiting Elmcare.com! Site Map | About this site | Home Tree Registry | www.TreeHelp.com Copyright http://www.elmcare.com/trees/structures/structure_of_trees.htm [2/27/02 10:30:08 PM] How Trees Breathe Home | Elm Care Products | Register your Elm | Forum Home > How Trees Work > How Trees Breathe Last Update 30/08/00 Acting as an enormous "carbon sink", trees soak up carbon dioxide from the air, producing life-giving oxygen in return. In fact, a medium-sized tree generates the How Trees Work same amount of oxygen as each one of Types of Trees us needs to breathe. Important Facts Structure of a Tree In a tree, 'breathing' takes place in the How Trees Breathe leaf. Chlorophyll (the substance causing How Trees Drink the green colour) absorbs the CO2 and uses it along with water to dissolve About Elm Trees minerals taken up through the roots. After the chemical reaction is completed, the Caring for Your Elm leaf releases oxygen and water vapor through its pores. Elm Tree Diseases Elm Tree Links Quick Elm Facts Thank you for visiting Elmcare.com! Site Map | About this site | Home Tree Registry | www.TreeHelp.com Copyright http://www.elmcare.com/trees/how_trees_breathe.htm [2/27/02 10:30:10 PM] How Trees Drink Home | Elm Care Products | Register your Elm | Forum Home > How Trees Work > How Trees Drink Last Update 30/08/00 There are two ways that a tree can take in water: through the leaves and through the roots. How Trees Work Trees absorb small amounts of moisture from the air through their leaves and their bark. Most of their water, however, comes via the roots. Types of Trees Important Facts Water enters the roots through thin membranes at their tips. The tree's vascular Structure of a Tree system draws the water up through the trunk and distributes it to the leaves. The How Trees Breathe leaves use the water to dissolve minerals.
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