Tag: trees (Page 1 of 2)

Seed of the Week: Ash Trees

When I found these keys/seeds, technically samaras, I had no idea what current events they represent.


The samaras are from an ash tree.


Several different species of ash trees grow in Arizona, all in the genus Fraxinus.


Ash trees are prized for their wood. In fact, ash wood is used for baseball bats.


Ash tree leaves are pinnate compound, which means they are made up of leaflets.


The leaves themselves are opposite each other, forming a V-shape with the main branch.

If you aren’t sure whether you have an ash tree, try this Ash Identification page.

The reason ash trees are in the news is because in certain regions they are being attacked by an insect. The emerald ash borer arrived in Michigan in 2002 and has been spreading and killing trees ever since.


(Photograph Pennsylvania Department of Conservation and Natural Resources – Forestry Archive, Bugwood.org found at Forestry Images)

Although the adult beetles are lovely, the larvae or grubs feeding on the trees under the bark is fatal to the tree. People are concerned that the ash trees will experience a similar devastation as occurred with the chestnut trees and elm trees in the past. In fact there is now a great effort being put into saving seeds of the remaining ash trees in the regions effected.

The emerald ash tree borer website has more information about the beetle and its spread. The main thing they are asking people to do is not to move ash tree firewood from place to place, as that moves the beetle larvae that live inside the wood.

We are going to plant some of the ash samaras we found. Sounds like ash trees could use all the help they can get.

What kind of ash trees grow where you live?

Seed of the Week: Silver maple

(I apologize to anyone who gets this as a duplicate via RSS feed. The original post was lost during a recent crash of the server.)

The mystery seed 8 last week was indeed a maple key, a silver or swamp maple (Acer saccharinum) seed to be exact.


Silver maples are commonly grown as ornamental trees in the eastern United States and southeastern Canada. They have lovely, delicate leaves with deeply cut lobes.


It is easy to find silver maple keys because they are the largest winged seeds of the native maples and because the trees produce a lot of them. Many birds and small mammals use the seeds for food.

Hopefully a few of those seeds becomes a new tree.

Tree Leaf Science Activities

Did you do the tree leaf age experiment last spring to see how long tree leaves stay on the tree? Now would be a good time to check your trees. Let us know what you found out so far. Some of the leaves we marked on our orange tree last spring are still on the tree.

If you live where trees are deciduous, you might want to study the next step:  what happens to leaves when they fall off the tree?

First, think about and make a list of what you think might happen. Do you think some might be eaten, or that they will all blow away?


Scientists study the decomposition, or breakdown of leaves, by putting leaves in nylon mesh bags and letting them sit on the ground for long periods of time. The researchers come back every few weeks and pick up a few bags to take back to the laboratory. They open the leaf bags up and see what is happening. They look at things like how much weight the leaves lost, what kinds of critters have been eating the leaves, and how the leaves have lost chemicals (nutrients) over time.

You can make your own leaf bags (also called litter bags).


  • Heavy duty screen door nylon mesh (1 x 2 mm mesh size is best) or the nylon mesh bags that fruits or onions come in from the grocery store.
  • Equipment, such as scissors, for cutting screen mesh
  • Equipment for closing the screen bag: glue gun or sewing needle and thread (soldiering irons can be used by adults).
  • Place you can safely leave leaf bags under trees and be able to retrieve them over time

If you are using the pre-made nylon bags from the grocery store, you can skip this step. If you are using screen door mesh, cut out strips 10 inches (25 cm) wide and cut into 8 inches (20 cm) sections and fold in half. Use the glue gun, needle and thread or soldiering iron to seal two sides. Leave one end open so you can put the leaves in.

Once you have the leaf bags made, go outside and fill them with leaves. Try to use freshly fallen leaves and collect only the leaves from under the trees where you will be leaving your bags. If the leaves are too dry, you can wet them with a bit of water to get them into the bags without crumbling. The grocery store bags will have larger openings, so you might want to use bigger leaves.

Close the bags with hot melt glue, or by sewing or tying them shut. Place the leaf bags outside in a place where you can safely retrieve them. You might consider marking the bags with sticks in the ground or tying the bags to brightly colored tent pegs shoved into the ground.

Now you have to be patient. Check the bags roughly every month and see how they are faring. Leave them under the trees until next year and then be sure to collect them. Open the bags into a tray or pan and sort through the contents. What do you think you might find?

Other fun activities for fall leaf drop season are to put the leaves back on the tree and exploring fall color.

Do you know what kind of tree this is?

We’d love to hear what you find in your leaf bags.

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