What type maple

They are hardy in USDA zones 5 to 8. Norway maple Acer platanoides was brought to North America from Europe in the midth century. It grows in hardiness zones 3 to 7. Though not as large as some of our natives, it is a fast growing, attractive shade tree that reaches 40 to 60 feet tall. However, in much of the country, Norway maple has become a nuisance species that exhibits invasive tendencies.

These trees are prolific seed producers. The seeds spread to neighboring yards and natural areas where they germinate quickly. And the seedlings grow fast. Soon enough the young seedlings cast deep shade, which combined with their dense, shallow root system, blocks out the resources other species need to survive. So they end up forming exotic, invasive monocultures that damage the local ecosystem.

Sugar maple Acer saccharum is a native tree that co-dominates mature northern forests alongside white pine, hemlock and beech. In the landscape it has long been appreciated for its deep shade and amazing fall color. This large shade tree matures at 65 to 75 feet tall, with a rounded canopy. It is widely adaptable to different climates and soil types, and may be the favorite among native types of maple trees in Michigan, the heart of its range in eastern North America. Sugar maple grows in zones 3 to 8.

In warmer southern climates, other types of sugar maple trees perform better. Both southern sugar maple A. Both grow to about 25 feet tall, with smaller leaves than their northern counterpart, and produce good fall color.

Paperbark maple Acer griseum is a smallish tree, often grown as a multi-trunked specimen tree, singly or or in clustered plantings. The compound leaves are made up of three leaflets. This tree offers four seasons of interest: an attractive branch structure, interesting bark that shows up well against an evergreen background, and brilliant fall foliage. The ovate leaflets and papery bark may leave the impression of a birch, but the winged seeds and autumn color, in shades of yellow, orange and red, leave no doubt that this is a maple.

Types or type expressions can be categorized according to the way in which they are defined in Maple. The simplest types are the surface types. These are generally defined in the Maple kernel, and represent superficial or top-level properties of expressions.

For example, type list is a surface type. Testing against a surface type is very fast; surface type tests can be completed in constant time, regardless of the size of the expression being tested. Arbitrarily complicated structured types can be formed by combining simpler, more primitive types.

They allow you to classify expressions based on their deep structure. Testing against this type requires not only that the top-level data type list of the expression be tested, but also that each list member be examined to determine whether it has the correct type posint. Testing an expression against a structured type may require a full, recursive traversal of the expression, so the time required to perform a structured type test often increases with the size of the expression.

Defined types are named types that may perform arbitrary computation. There is no rule of thumb for the performance characteristics of defined types, since they may be very simple or arbitrarily complex.

The following type names, which include surface and structured types, are defined in Maple:. TermOrder deprecated. If a type name is an operator or keyword, it must be enclosed in left single quotes to prevent a syntax error. See the examples below. Some types become active only after a specific package is loaded. Arguments passed to the type command are evaluated normally as for other Maple commands.

While it is rarely necessary to do so in interactive use, Maple programs that seek to be robust should enclose names that appear in type expressions with unevaluation quotes ' to prevent evaluation.

For example, if the name T is assigned the value 2 and is also used as a type name, then type e, 'T' will work correctly, while type e, T will likely fail. In this case, it would fail silently, because 2 is a valid type expression.

In Maple, type expressions are first class expressions. Types can be passed as arguments to, and returned from, procedures and can be stored in data structures.

You can manipulate complicated type expressions just as you would any other Maple expression. Type expressions are , in fact, ordinary Maple expressions. It is only in certain contexts that these expressions are recognized as types. Not all expressions are valid types, however. While at first you may think all bark looks the same, there are a few key traits associated with certain species that can aid in maple identification:.

When you have a naturally-occurring maple species, identification is fairly straightforward. When you are dealing with hybrid cultivars, determining what kind of tree you have can be more difficult. For example, the autumn blaze maple tree is a hybrid of a red maple and a silver maple, and will have characteristics of each parent.

Looking at the leaf and bark will usually give you a good indication of at least part of the parent stock, from which you can consult other resources for more precise plant identification. Accurate maple tree identification can sometimes be an issue if you are concerned about the health and care of your tree, but most maples normally are subject to similar pests and diseases , and most require similar care. Whatever kind of maple you have, you can be sure you have a beautiful, sturdy tree that will give you years of enjoyment as a shade tree, ornamental, or conversation piece.

Garden Everything Trees How to Identify Maple Tree Varieties With over a hundred species and nearly as many subspecies, maple tree identification can be tricky. Basic Maple Tree Identification. Sugar Maple Acer Saccharun. Red Maple Acer Rubrum.

Silver Maple Acer Saccharinum. Box Elder Acer Negundo. Norway Maple Acer Platanoides. Japanese Maple Acer Palmatum. Paperbark Maple Acer Griseum. Leaf Shape You may already be familiar with the distinctive leaf shape associated with most members of the genus Acer. Looking more closely at the details of the leaf will give you a better idea what sort of maple you have: Compound leaves : While the majority of maple species have simple leaves, two notable exceptions, the box elder and the paperbark maple, have compound leaves, with three to five leaflets per leaf stock.

You will be able to easily distinguish between these two species by looking at the bark, detailed below. Very deeply-lobed leaves : The Japanese maple is known for very distinct lobing of the leaves, so much so that they almost appear to be compound leaves.

However, you will note all lobes of this leaf still originate from a single point on the leaf stock and have no stems of their own. There is some variation between cultivars of this tree, but most possess this feature to a greater or lesser degree. Large, 5-lobed leaf : Both the sugar maple and the Norway maple have this characteristic, with the sugar maple leaf having a few large teeth and rounded spaces between the lobes.

The easiest way to tell these species apart using the leaves is to break a leaf off the twig.