The Slough

A busy life, the return of mosquitoes and then the ever more aggravating deer fly, have kept me from the woods -through which I must pass to get to the back slough. The slough, a small natural woodland basin bordered on its west by an old gravel pit, has become wetter over the last decade. Prior owners of the neighboring pit decided it would be more useful filled and so introduced a stream of trucks dumping their fill.  We believe this raised the water table and is the reason our woodland vernal pond supporting silver maples and green ash has become a permanent swamp; one that has dried, only temporarily, a couple of years out of ten. The last of the trees within its bounds has died and the aggressively spreading, wet soil tolerant canary reed grass has taken hold in the newly sunny slough.

Yesterday morning a meso-scale storm passing just to our north provided a strong draft and mosquito-free window to pass through the woods. The last time I gazed upon this rapidly changing two acres it was a pond pushing beyond its bounds. Now, the lower water table of summer has changed it to a burgeoning meadow; the remains of duckweed sitting on a crust of drying muck.

Canary Reed Grass, Phalaris arundinacea

Although I seeded a portion of the slough in December with what is called a detention mix, I'm not surprised to see an abundance of human-bred, hybrid canary reed grass, Phalaris arundinacea.

It is a surprise to see the blue flag, Iris versicolor, I planted two years ago continuing to bulk up, maybe even thrive, despite the competition from so much mad dog skullcap, Scutellaria lateriflora.

This sedge, "weeded" out of a wetland edge of a nearby lakefront residence, has begun to transform the northwestern edge of the slough. I hope to see it "make a stand" against the encroachment of canary reed grass.

I purchased seeds of another grass, prairie cord grass, but have been hesitant to distribute the seeds. It is a native, warm season slough grass that I intended to use as a foil to the cool season canary reed grass. Like canary, it spreads by rhizomes and can be aggressive. Although it grows all over Minnesota, further reading led me to think that the six to eight foot grass may not be the right choice. I'd rather be out ten dollars in seed than dealing with another grass, not currently present, that then spreads too widely. My curiosity, however, gets the best of me -I have tray-seeded a few to see how they grow.

As more storms approached from the north, I pressed on toward the little wetland to see how it has changed since the high water of late spring. Water sheds from the surrounding moraine, draining through two gullies, then filters through two wetlands to pool at the bottleneck that leads to our driveway culvert. Earlier this spring I cleared the growing stand of buckthorn from the floodplain surrounding the bottleneck. Dying ash and falling box elder have opened the canopy here, letting in more sun.

In early June I made an attempt to slow the spread of canary reed grass weakened by five weeks of flood waters. Wearing knee high rubber boots, I cut any grass growing along the perimeter of the open water with a weed trimmer. Although it has come back now that the water has receded, it has done so less vigorously -a rather minor victory. If I want to maintain open water here, or better yet, introduce sedge and other wetland plants, I'll need to continue to fight back the canary reed grass which has a stranglehold on much of the small wetland.

Last Saturday I spent an hour at a nearby natural landscape contractor's end of season native plant sale. Most of my purchases (only $2.50 per plant!) were infill for my prairie plantings, but I did buy a couple of wetland plants. Above, ironweed, Vernonia fasciculata, has a wetland indicator status of facultative (FACW). This means it usually occurs in wetlands -66 to 99 percent of the time. This wetland status and my failure to grow it successfully in my dry Brooklyn garden led me to choose the flood plain as its new home.

My other purchase, broad-leaved arrowhead, Sagittaria latifolia, has a wetland status of obligate wetland (OBL) which means that it occurs in wetlands nearly 100 percent of the time. This plant prefers standing water and at least partial sun, so I placed in the pool that collects at the bottleneck, a stones throw from the ironweed.

We've been in a very wet period, receiving several inches of rain over the last two weeks. The tropical air and daily storms are expected to last through the week. Over the last 24 hours we've received over 3 inches of rain, and another three plus within the last ten days, bringing the water table back up to where it was in late May. This morning, braving the mosquitoes, I ventured to see the arrowhead I planted two days back -but it is missing, most likely it has tipped over into the muck under the rising water.

Sedges Have Edges, Rushes Are Round, Grasses have Nodes...

It all started with a blizzard that pushed us right into excessive heat of summer before May was out. We hadn't had more than a few hours rain over the month, so little that, with the heat, high sun, and drying wind, even succulents were bowing to the ground.

By Memorial Day, rising heat and moisture became the cauldron from which storms could manifest. 

 

Our woods and garden had accumulated three inches of rain by Tuesday. Another five eighths came later that day. This broke the drought, for now, and not everywhere, but in our woods. It also spared two climbing roses that we transplanted along with an arbor from a rapidly shading garden, on one of the hottest days, when rain looked immanent, but wasn't.

Was it the rain, or the freshly loosened soil under the trellis, that brought my first turtle sighting to our clearing in the woods? By early morning, this medium-large sized snapping turtle, Chelydra serpentina, made its way up the slope from one of many watery sites and began depositing her eggs directly beneath the newly moved rose trellis. By mid morning she was gone and around her clutch, Betsy installed a fence to keep out likely predation by raccoons (just steps away is a perma-puddle with not-so-little raccoon "hand" prints scrawled across the bottom). In fifty or one hundred and twenty five days the little ones may emerge from the nest.

The rain also gave a much needed boost to the garlic on both farms. Already stressed by the latest of winters, drought had begun to take its toll. The garlic is about the size it would normally be in early May, although the date is early June. The rain also gave boost to the mass of thistle, grass, and lambsquarters in this new plot, all weeded this past Sunday with one more weeding likely before harvest.

In the other plot, the weed profile is completely different: smartweed, bindweed, and purslane. The garlic is generally larger here, although still less vigorous than should be at this time, with many lost cloves of artichoke, turban, asiatic, and creole. In either of these two plots I picked up my first embedded tick, the wood type, as I wore shorts for the chore, something I have not done before. For all my traipsing around in the woods and elsewhere, I have yet, until this moment, to have a tick embed itself. In fact one would not anticipate that the garlic plots are where I would pick up ticks given how much time I spend in the woods.

In the year old savanna gardens a cool season grass has come up to fill the blanks readily and, although attractive, my suspicion is that it was unlikely to have been seeded with the shortgrass or savanna seed mixes broadcast in these sites a year and half ago. Nothing triggers plant weariness or all out blindness more than grass identification, but grass identification is often needed and difficult.

A last minute reprieve was handed out by the folks at Minnesota Wildflowers, a site dedicated to visual identification of native Minnesotan plants and those we find among them. In this instance, my picture post on their FB page lead to an ID a few days later, prompting me to immediately begin pulling. I hazarded the guess that it came with the poor quality straw purchased from a local farm supply. It was only in those areas where I had spread the straw for erosion control that the new weed, Cheatgrass, Bromus tectorum, as well as common oats had sprouted.

It's only then, after a positive ID, that traits of a weedy species appear to express themselves clearly. Each day since, I continue to find more inflorescence hidden among the other forbs and grasses. Like any impressive weed, this grass exhibits the ability to grow from the base of other plants and set seed at heights of only an inch. At the same time, this winter annual (cool season) grass can take advantage of rising CO², thereby increasing its biomass, indigestibility, and fire threat. Not long after, I begin to see other grasses that appear similar to Cheatgrass, but maybe taller or with smaller inflorescence, maybe smoother stems or less blue coloration in the leaves and stem. What then?

Can you tell the difference between these two grasses? Side by side, you may notice differences, but in the field grasses can blur together.

Spot the different grasses in there? From this picture, it looks to be all forbs, but it is likely 40 to 50% grasses. As the shortgrass mix I scattered here two winters back consisted of predominantly Side-oats Grama, Bouteloua curtipendula, and Little Bluestem, Schyzachyrium scoparium, a sensible guess would be that some of these grasses are present. Little bluestem is fairly easy to identify as a warm season, low growing, bluish bunch grass -not the predominant grass here.

Upon closer inspection, the grasses become more visible. Non-weed, perennial grasses tend to grow slower than annual weed grasses, but also slower than the annual forbs such as the first-year predominant black-eyed susan. In this second growth season, the grasses are making themselves known and the black-eyed susan are spread more evenly and less thickly. The site also has plants that I have cell-tray seeded and planted last summer and fall as well as more mature plants transplanted from other locations.

This grass, blooming now, is scattered through the site. It may be Fowl Manna Grass, Glyceria striata, but then again, I'm not sure. To become an expert in grass identification, one must make solid observations. The easy part is cool season, warm season or bunch or spreading, but in an ascending order of difficulty we have dull or shiny, pubescent parts or not, ligules formed this way or that, leaves folded or flat, sheaths fused or unfused, and on. It helps to know general things about a species, such as preferred habitat or weed status, but that only opens the door to more complex examination.

It is clear that the creatures appreciate these clearings repopulated with food and shelter. The milkweed planted two summers ago have begun to establish solidly among the grasses, monarda, goldenrod, asters, and much more.

These sites are a favorite of large and small dragonflies, monarchs, toads, and moths such as this Xanthotype species.

What's this? A new concept in contemporary landscape architecture? No, its a sheet of thick plastic designed to combat what was once grass, but now is one hundred percent creeping charlie, Glechoma hederacea.

It only took three years for it to go from sporadic lawn weed to total ground cover and the reason is largely due our garden choices. Putting vegetables in the lawn area, where we had our only sun, or making a hedgerow along the driveway edge created shade that charlie took advantage of. The wet weather over the last two years and our heavy clay soil worked well with our yard plans to bring us this new idea in lawns.

Why is it that a monoculture of grass is more desirable than a monoculture of charlie? After all, charlie feeds the bees and smells great when crushed (insert someone offering its medicinal value here). Is it a texture thing, a cultural, or visual thing? Lawn grasses, like charlie, are weeds around the world, but maybe we don't see grasses (remember grass blindness...). For us, a creeping charlie lawn comes down to at least three negatives: this "lawn" will always be the spring of more charlie invasions in the woods, the visual texture is off putting, and it's a pain to have to weed this out of every shady nook in the yard and garden.

Charlie hides out in the shady base of perennials, between stones, under dense shrubs, and just about anywhere there is shade and moisture. Its stolons spread in every direction, with a preference to run toward shade. At our place that means downhill, toward the woods, where it is becoming an increasingly problematic ground cover. Its seeds roll downhill in rainstorms and get stuck in clay-filled shoe treads, but worse is how its bits and pieces follow raked leaves onto slopes.

I have my eyes on several infestations, one of which looks not all that different from the lawn, but under the canopy of trees on a north facing woodland slope. In fact, charlie is giving garlic mustard that grows there a hard time, but the garlic mustard is much easier for me to eradicate, with or without its help.

After the plastic comes up this summer, the idea is to till the soil, add compost, and place thick sod in its place. It's a good idea if we do not grow vegetables here any longer. Maybe we should grow vegetables here, but add sand and brick between the raised beds? No matter what we do, charlie is instigating a lot more work and we've already plenty of that.

Off Season Woods

Summer is the off season in the woods. This is because the field and home require attention while the weather is right, but also because mosquitos own the woods at this time of year. There is, however, one draw and that is mushrooms. 

There had been an explosion of Jelly fungus on cut logs downslope near the north wetland. It has, by now, yellowed with age, but still a fascinating fungal mass. Mosquitos be darned, in the woods with the camera I took a stroll to see what else was going on.

 A mysterious white fungus or mycelium between two logs.

An incredibly striking red slime mold on upright cut log faces. Anything this red within the green understory grabs your attention.

The channel connecting the north wetland to the southern, great wetland runs with rain water. We cleared this area of most garlic mustard two months back and the Jewelweed is beginning to take off. Now, let me get out there and clear those branches.

Recent storms haven't been terribly windy. Still this large limb, about two feet in diameter at the base of the break came down. It's Basswood, Tilia americana, not the strongest of trees, and prone to hollowing of the stem at height. One nearly came down on me as I walked the woods in March. Just pop and drop! Lucky for me I was distracted by the sound of running water which altered my path. A minute later I watched the large, single stem tree break about 12 feet up and fall over onto the path I was about to walk.

In the back woods I find another Basswood down (that's three this year alone). Those that have fallen are the oldest of the Basswood in our woods and two have been large, multi-trunked trees. Basswood can be easily identified by its multi-stem growth habit -its the sure fire way to ID the tree in winter, when young, or with similarly barked trees. We're not big fans of Basswood trees, largely because of their weak wood and propensity to fall without notice (a local woman died under this tree species recently). Incidentally, the tree reminds me of my former position in an architecture lab where basswood was the model building wood of choice. I'll take oaks, ash and maples over bass any day.

The back swale hasn't had time to drain down with all the recent heavy rains. It appears this area will be wet year in and year out and I should rethink my attitude towards it. Several years of heavy rains have kept the soil water logged and the trees standing in water that aren't already dead are only hanging on by a thread. When cold weather comes we may have to tackle some of the larger standing trees, leaving woodpecker stumps that won't fall immediately, but when they do they shouldn't take anyone out.

Open Season Fungus

These morels were brought to us by our hunter. He foraged them from our woods after a couple hours of chainsaw work clearing old timber fall on the trails. We dried them for future cooking.

Now that it is raining, mushroom season opens in earnest. Oysters and jelly fungus are appearing, and soon enough there'll be chickens on oak timbers.

Taking Spring

At the morning table with coffee, I was a bit taken by the sudden appearance of a green tree among the gray. When did this happen? 

A basswood, apparently young, but one never knows as trees will linger under the shadow of larger trees for years.

It looks to be algae growing over lichens only on the north-northeast side of the tree. That it is only this tree is surprising. There are plenty of trees with this exposure, many also slim and lack vigor.

Of course, there are other greens on trees. Like these mosses at the base of a nearby white oak, Quercus alba.

_____________________

Although only forty something, the breezes were a moist balm. Rain was on the way, the first rain of spring, and likely the first since October. I lingered outside wearing only a sweater. Toms pace the slough casting their garbled opinions. A red squirrel spits its rattling chastisement. Trilling robins blaze high limbs. The dimly lit woods is colored by sound. The animals take spring sooner than we do.

Vernal Pond

There's been a lot of rain this spring, creating what may be the deepest vernal pool in the swale. On it, a coating of duckweed.