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how do your ash leaves grow? part 1

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Since the flowers have fallen off my tree and the leaves have started growing, it just doesn't seem like anything very dramatic is going on out there anymore. It's a little greener; it's a little leafier. But how much greener is the tree each day? How much leafier?

In order to answer this question, I chose a leaf to measure regularly to see how fast it was growing. I looked back at the pictures I'd taken of other leaves and noticed that I'd actually caught a glimpse of this leaf as it started opening on April 29th.

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I started measuring the leaf four days later. (Note that this requires a precarious balancing act of me hanging out the window dangling a camera and a measuring tape 15 feet above the sidewalk, so it's a little imprecise. But I think the growth is significant enough for me to get an idea of how fast things are happening.)

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On May 3rd, my little leaf was already 3/4" long. So, since it was still closed on April 29th, that's 3/4" in its first four days.

Two days later, on May 5th, the leaf was 1 1/8". That's 3/8" of growth in two days!

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And on the next day, May 6th, I struggled with wind while photographing, but was able to measure the leaf at 1 1/4". That's another 1/8" growth in one day!

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On Mother's Day, May 8th, it was 1 1/2" long.

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That would be another 1/4" in two days, or 1/8" per day. Pretty steady growth! I'm guessing that the quicker growth at the beginning comes from the leaves first pushing straight out a good 1/4" in a single bud before the leaves even begin to open.

I actually managed to get some pictures of this initial growth elsewhere! As I was taking the picture on the 6th, I spotted a bud below that was just beginning develop. Some of the tiny buds on the tiniest twiglets haven't done anything so far. At this point, I'd kind of assumed they weren't going to do anything, so I was surprised to see that this one was actually starting to push up it's little brown cap and send green leaves out after all.

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That was taken at noon on May 6th. 25 hours later, at 1pm on May 7th, it looked like this.

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Look at the little bud cap just ready to fall off! A mere 6 hours later, at 7pm on the same day...

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...the leaves were wide open and measured 1/4"!

That is cool!

Lots more measurements coming up tomorrow....

maple leaves

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One week ago, Bud - the little maple tree in front of our house - was just starting to sprout leaves. I was surprised to see them come out of the same buds that had produced all the fabulous tiny green flowers.

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A few days later, I took a peek at the maple down the street where we park our car. It's generally been about a week ahead of Bud, so I was hoping to find some real leaves. And there they were, all shiny and new. They've got that classic maple leaf shape too!

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So I knew there would be lovely maple leaves on Bud this week. This morning I went out on the balcony to get a close look at Bud and was not disappointed.

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Not only is the leaf fully formed, but the flowers have started to sprout or change into the maple "key" seeds (you know, those helicopter shaped seeds that spin down from the tree). I wonder if all of the flowers will produce these keys?

I was curious about other maples, so I went back to visit a maple I'd spotted on the playground a couple of weeks ago. It's not a Norway maple like Bud or the tree by our parking space. I knew this because it was so red! It still looked like a maple though. The buds looked exactly the same and the flowers were very similar. But where Bud is bright and cheery in lime green, this reddish maple was simply stunning.

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Two weeks later and it looks like this:

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Oh my, all the red's gone. There's a definite maple leaf though and some maple keys. Right next to this maple was another with gorgeous winged keys coming off of bright red stems.

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A quick look at the What Tree is It? site (can you tell that I love that site??) helped me see the key difference (ha, ha, I made a tree pun) between these two types of maples: the distance between the two wings of the key.

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The Norway maples have wings that are widely separated, whereas the playground maples have wings that are quite close to one another. What tree is it? says that would make my mystery trees on the playground bona fide red maples!

the anatomy of an ash tree leaf

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Now that they are finally here, just what do my tree's leaves look like?

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Each leaf is made up of seven smaller leaves. These smaller leaves are oval shaped, tapering to a point at the tip and have little ridges along the outside edges near the top. They are arranged, like everything else on this tree, in pairs opposite from each other. You can see above how two are growing left and right and another pair are growing at the top and bottom. And the next set of leaves in the center is repeating that pattern.

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The same pattern is also visible in the shoot below.

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There's a pair of stems coming out, then another pair offset 90 degrees and so on. I noticed this exact pattern in the twig of my tree when I first started watching it back in February. I'm now even more convinced that this growing green shoot will be the extension of the twig for this year.

I returned to the What tree is it? website to see if I could identify my ash tree just based on the leaves. I learned some nifty vocabulary along the way. My tree's leaves can be classified as broad and flat (as opposed to having needles or scales), compound (as opposed to a simple, single leaf), and pinnate (which means all the little leaflets are at different spots on the one stem instead of all coming out of the top), with toothed margins (which means that the edges are serrated not smooth). I hadn't even noticed that last one until I got up to that question in the key. I had to look out the window and take a picture!

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The fact that the leaflets are all the same size and are arranged in an opposite (symmetrical instead of alternate) pattern finally gets me to Ash trees. Hooray!

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But what kind of ash tree is it? (There's green, white, blue, and black.) The following questions in the key involve looking at the size of the leaves as well as some finer structures on them. Since my leaves are not yet fully developed (the largest I can reach is still only 2 1/2" long), I'm going to wait until they are all done growing to continue with the leaf id. To be continued...

shoot

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Since I've been watching the leaves open up on my tree, I've been feeling a little disappointed because I haven't really felt like there was that much change going on. The leaves aren't becoming exponentially larger each day or anything. But then I realized that the leaves were moving farther and farther away from the tips of the twigs.

When the buds began to open last week, they were coming right out of the terminal buds on the tips of the twigs. Look at how they were stretching the bud open!

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Two days later (just before all the flowers fell off), they had begun to pull apart from each other and away from the bud.

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The next day, they weren't much more open, but they seemed a little taller. And the bud had completely disappeared! Perhaps it was stretched too far and fell off along with all the flowers?

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On Sunday, I noticed a clear difference in the height of the leaves.

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They were much farther away from the tip of the twig than before. And in the center, I could see one thick shoot that all the leaves were branching off from.

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Is this how the twig grows longer? Will that thick green shoot in the middle be the continuation of this twig?

from flowers to leaves in one day

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On the very first day of spring, the buds on my tree began to open as if on cue to reveal purple flowers. Today, on Arbor Day, the tree shook off the last of those flowers and transformed itself into a green leafy tree just like the maples that bloomed last week.

Only yesterday, heavy, wilted flowers still hung from all the twigs.

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Small leaves had just begun shooting out at the tips.

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After a rainstorm yesterday evening, the road and sidewalk were littered with the flowers.

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And in the sunshine this morning, the twigs were bare save for stunning open leaves at every tip.

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They're so lovely, they're almost more flowery than the flowers ever were.

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A good day for a tree.

watching the leaves grow

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leaves4_26b.jpg

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(All pictures taken yesterday, April 26, after a week of warm weather, including three days of rain.)

waiting for leaves

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Last week, when we last checked on the leaves of my tree, the little green pistachio tips had just started to open, sending out two tiny green wings.

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Two days later, the wings had stretched out so much that the buds looked like little webbed duck feet.

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(It occurred to me that this structure - a vertical line in the center with two lines coming out at a 45 degree angle on either side - is the exact same structure of all the branches. It was one of the first things I noticed about my tree and inspired my husband's logo tree drawing.)

Yesterday, the center part of the buds started to uncurl just enough so you could begin to recognize tiny leaves in there.

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It looks like three or four leaves huddled together.

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You can see a leaf right there in the center. The leaves on the sides look like hands holding it. Beautiful.

And just this morning, in the corner that gets the morning sun, I spotted one bud where the leaves were beginning to separate from each other and unfurl in what looks like a spiral shape.

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Yippee! I wonder how many leaves are going to be in there. I wonder how big they'll be. Not too much longer now!

open wide

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The little green pistachio buds at the tips of the twigs of my tree are growing like gangbusters! Here's how my twig looked on Friday the 15th.

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And on Sunday the 17th, it opened up!

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And today, it's opening even more!

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A close look at that center section really makes me think there's a leaf in there that is going to uncurl itself. Or maybe it's like an onion with many layers of leaves that will continue to pull away from the center like the first two have.

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It's cool. That's for sure.

now in color

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After looking at this big gray tree for two months, I'm so thrilled that it is finally starting to have color!

The flower clusters glow almost red in the morning light.

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And the sun reflecting off the mossy growth on the bark hints at all the green to come.

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The rain reveals deeper hues in the brown buds and pistachio leaves emerging from the twigs.

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And the camera lens confirms my suspicion that the purple flowers are turning green.

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For more fabulous pictures of trees in early spring bloom, check out this amazing photoblog from a woman following 93 trees for a whole year. Her pictures this month really capture the tiny yet amazing beginnings that make spring so magical. 

the tipping point

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So, remember my little theory about the tips of the twigs getting longer? I've been taking photos of the tips of a couple of twigs to check and see if there's any change. Here's what happened this week.

The first twig looked like this on April 7th...

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and on April 9th...

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and yesterday...

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WHOA! Hold up! That is GREEN. The bud at the tip opened up. Just since the weekend!

Let's look at twig #2. April 7th...

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and on April 9th...

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and yesterday, April 12th...

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Squeee! More green!

I'd been wondering what those terminal buds were going to do. All the side buds have been opening up for weeks, revealing the pretty purple flowers but the buds on the tips, nothing. And now, it turns out that's where the green was hiding.

Once I realized that something was going on at the tips, I started seeing buds like this everywhere. They're all doing this!

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They're like long green tongues coming out.

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There seems to be a twist or fold or something through the middle. Is that a super curled up leaf in there??

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Wow. Wow. Wow.

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About this Archive

This page is an archive of recent entries in the leaves category.

honey locust is the previous category.

maple is the next category.

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