Autumn 2

No calendar-worthy photos, just the nature around the high school where my son was refereeing soccer last Saturday.

Red maple (Acer rubrum) tends to mix its reds with remaining green.

 

 

Some relative of dogwood (Cornus) with blue fruit.

Staghorn sumac (Rhus tomentosa) is a large shrub/small tree with fuzzy stems and large, many-parted leaves.

 

Virginia creeper (Parthenocissus quinquefolia) is a pretty vine
that is even more striking when it turns.

The quaking aspen (Populus tremuloides) nearby had a few leaves turning,

but this gave a distinct yellow cast to trees in the distance.

Speckled alder (Alnus rugosa) basically turns brown in fall.

It's a valuable small tree though, because it has root nodules in which bacteria live

and "fix" atmospheric nitrogen for the plant.  This ends up enriching the soil.

The catkins that will bloom next spring are already present.

Japanese knotweed (Polygonum cuspidatum) is a serious alien invasive.

It produces enormous numbers of offspring, and it's all over the place.

Poison ivy (Toxicodendron radicans), a good, card-carrying native,is mainly invasive

(not to mention annoying) because it is our shadow: it like the habitat "edges"
we create when we clear, build, etc.  But at least it's pretty in the fall!

At the pond edge, cattail (Typha latifolia) leaves are beginning

to die, but leaving their iconic fruits.

Just now in bloom, this aster seems a little incongruous.

Taking the large view, you can see that there's still a lot of color ahead.

Autumn 1

Kinda like I did when spring was busting out all over, I want to try to keep up with the changing panorama of fall in my neck of the 'burbs. Judging from the spring, things will come at me faster than I can say intelligent things about them--which, come to think of it, you might well find refreshing--so I may simply report.

Of course, I'm already behind the curve, since trees have been sneakily changing for awhile now.  But in my defense, much of the color seemed to me a response to drought: we have not had more than a quarter-inch of rain any of the few times t has rained since way back in mid-August, and the plants have been hurting.  

 In late August our big ash looked sick, with every excuse in the world.

 

A month later it looked wilted, and I was getting really worried.

Now she is definitely turning, along with other white ash trees in the neighborhood. (10/2)

 

The trees on a little island in Nippenicket Pond, West Bridgewater a couple of

weeks ago first led me to suspect that autumn was underway: living with their feet 

submerged in the pond as they did, the colors of the red maples (above) 

and tupelo (below) were likely NOT due to drought!

 

My neighbor's big red maple well on its way. (10/2)

Big Daddy, a large red  maple standing in a row of small females,

is going great guns, but will soon be leafless.  (9/29)

Nearby, Little Mama, is still making up her mind to turn, beginning

with the edges of her leaves and her veins and leaf stems.  (9/19, 10/2)

The sugar maples in the neighborhood, like the red maples, are all over the place. 

 

A tree deformed by years of hacking by road crews trying to keep it away from power lines

is now in its glory: it began turning weeks ago.  Sugar maples sometimes turn an amazing  flame-color.

Just around the corner is another tree that is having

an internal disagreement: shall we turn, or not?

In a trio of sugar maples nearby, one tree has already lost half his leaves,

while his neighbors have not yet begun.

A brief explanation of how and why leaves turn the colors they do is here, with the slightly longer and more grown-up version here.  Another nice page that makes it clear that leaves don't just "fall," but are actually pushed.  Not sure about the reason for leaf drop, though.  I have heard two other hypotheses: that trees drop their leaves to avoid drying out, and that it reduces wind stress.   Here's a University of Illinois page that delves a little into the chemistry and biology of leaf color.