Category Archives: Forest

Catkins – Drooping & Dropping

For just a few days in the spring, male catkins —- slim clusters of drooping flowers (often crudely described as worm-like strands) drop from the forest canopy. Their female counterparts (usually chunkier and upright) remain in the tree, awaiting a good wind to impregnate them with the pollen from the males. Fertilized female catkins will produce seeds. In an oak tree, they bear acorns.

In Westwoods, the ground is strewn with male catkins from oaks and silver birch. They are extremely delicate so that any disturbance (such as picking one up to examine it) releases bright yellow pollen. The naked eye cannot see how gorgeous these flowers are but take a look at these enlarged scans!

Oak tree Catkins
Oak tree Catkins
Silver Birch Catkins
Each of these strands has over 300 separate flowers.
Detail of an Oak tree Catkin
Detail showing individual flowers of an Oak catkin.
Detail of Silver Birch Catkin
Detail showing individual flowers of a Silver Birch catkin.

Rotten Designs

Rotting wood is my new passion. Where I walk in Westwoods has a greater share of dead trees than most other forest areas. It used to be dense with Hemlocks until they were killed by the wooly adelgid infestation. Now the forest floor is covered with downed trees and branches. It is truly a mess. I used to think it was ugly. But I started to see the standing stumps and logs as carved sculptures. Then I looked closely at some fallen logs and was mesmerized by the patterns. Some are made by fungi, some by boring beetles, and some by weather. Enjoy this gallery of rotting wood.

An Image Sealed With a Kiss

Crustose lichen on fallen log

I knew of course that I was photographing a log, but when I saw the isolated details through my camera, I was mesmerized by an abstract world of shapes and colors. Looking at the image afterwards, however, I began to see the white blobs as central characters. Then the characters became animals. Finally, one of the animals kissed the other.

I now know that the kissing blobs are a form of crustose lichen. Crustose lichens, as their name implies, form crust-like structures – in this case, on a rotting log. All lichens are made up of algae or bacteria (the plant part that provides the photosynthesis) and fungi (the part) that provides structure. The black outline of these blobs — a painterly effect of nature — is due to the wearing away of top structural layers, exposing the underlying threads (hyphae) that attach the lichen to the log. Learning the science of the image didn’t spoil it for me. It’s semi-abstract quality was sealed with the kiss.

Paper Wasps in Winter

Nest of Paper Wasps
Wasp hotel with 225 living units.

I found this amazing structure on the ground near my house. Its former inhabitants — paper wasps – had probably been living right under my nose all year in this attached unit under my porch. I counted 225 hexagonal rooms – a major hotel! The hotel is shaped like an umbrella (we are seeing the underside in the picture) with a roof constructed with layers of homemade paper — organic matter that the wasps harvested, then mixed with their saliva, and formed into sheets.

Now, with temperatures in the teens, the wasps are either dead or hiding in crevises or inside my house. Unless there was an unusually plentiful food supply and easy access to warm quarters, the worker wasps would have sacrificed food and shelter (in other words, their lives) for their Queen. When the Queen reemerges, she will discover that her nest is gone. But, if she liked the location (and I hope she did), her offspring will build in the same place. So I’ll be looking out for another creative addition to our house in the spring of 2022.

Something Swallowed the Tail of this Swallowtail

Eastern Tiger Swallowtail
A Swallowtail with missing hindwings and a triangular bite out of its right forewing.

Hopefully this lovely Eastern Tiger Swallowtail had achieved the ripe old age of about two weeks and had therefore lived a full life, for it couldn’t possibly survive much longer. I found it in the middle of the trail. Both hindwings were missing and its right forewing was damaged. Normally, in the presence of a person, a butterfly would fly away, but this one hopped. Its left forewing, still intact and operable, fluttered with each attempted takeoff so that the butterfly lifted a few centimeters on the jumps. When it was safely off the path and in the leaf mulch, I walked away with a pang in my chest – a familiar and necessary reminder of death that is one of the many offerings of walking in a forest.

An American Toad Experience

American Toad
Illustration of Toad Anatomy

I’ve seen plenty of toads as they were hopping away to escape my foot. But this toad froze in its tracks. As I bent down to take its picture, I experienced a mixture of shock, disgust, and concern, for it appeared to have holes in its back, each filled with brown seeds.

That evening, I settled into my comfy armchair to read about toad anatomy. The holes in its back are called dorsal blotches or spots and the “seeds” are actually warts. Toad identification includes counting how many warts are in the spots. One or two per spot and it’s an American Toad. More warts per blotch, then it might be a Fowler Toad. Interbreeding is common between the two species, which probably explains why our toad has one or two warts in most of its spots, but one spot appears to be crowded with maybe five warts. So this is probably not a purebred American Toad (a Yankee?) but one with a bit of Fowler in its past.

The two oval sacs behind the eyes are the parotoid glands that secrete bufotoxin, a substance that ranges from mildly irritating to poisonous, depending on the species. The American Toad’s protective secretion is on the mild side, a fact that for most people is reassurance that their curious dog may vomit, but probably won’t die. But for others, it’s a matter of self-interest, for toad-licking is making a comeback!

Toad-licking is a real thing, but most toad abusers these days milk the glands and then dehydrate the bufotoxin so that it forms a powder that is suitable for smoking. Apparently, the most satisfying hallucinogen comes from the Colorado River Toad. Symptoms of ingesting toad serum include unresponsiveness or having convulsions or vomiting. Yet so many toad users report having a religious experience (“being one with God”) as well as enduring positive feelings that Johns Hopkins University is researching the use of toad venom to treat depression.

Like all good experiences, getting high from smoking toad serum has been overdone. Advice from an addiction center website: If you or someone you know is abusing Toad Venom, there is help available.

Chicken of the Woods

Chicken of the Woods
Chicken of the Woods

This bright orange mushroom is so named because it tastes like chicken. You would think that it’s similar to another more commonly known edible mushroom, Hen of the Woods, but the two fungi named after a female fowl are only distant cousins. After watching an informative video by the same upbeat mushroom aficionado who taught me about Turkey Tail, I was able to check all the boxes for laetiporus sulphureus. Chicken of the Woods grows in layers on dead trees. It is velvety, thick, and fibrous. Its topside is orange with delicate yellow edges, and importantly for its identification, its underside is yellow with microscopic pores. I scanned a sample and enlarged it by a factor of 20 in order to be sure of those pores.

I once vowed that I would never forage mushrooms, but I felt confident enough to harvest a chunk of the alluring fungus, sauté it according to the Chicken of the Woods recipe by the Sophisticated Caveman, and eat it. It was delicious! And indeed tastes like chicken.

(If there are any blog posts following this one, you will know that I survived.)

Turkey Tail – NOT!

Violet Toothed Polypore Fungus
Violet Toothed Polypore

Just before leaving for a three-week vacation, I took some photos of a fungus covering a fallen dead hardwood tree. While I was in California, I watched a video by a charismatic fungal enthusiastic, Adam Haritan, who made it clear that my fungus was either Turkey Tail or a Turkey Tail look-alike and that the only way to know for sure would be to examine its underside.

If the underside was white and had tiny pores, my fungus was trametes versicolor, commonly known as “Turkey Tail.” If it was more beige and smooth, it was stereum ostrea with the pitiable moniker “False Turkey Tail.” If it was slightly purple and had a toothy structure, it was trichaptum biforme – “Violet Toothed Polypore.”

During the three weeks, I realized two things: 1) that I was subconsciously rooting for my fungus to be what mycologists call true Turkey Tail and 2) how prejudiced I was being. After all, “False Turkey Tail” was so-named only because of its resemblance to the topside of trametes versicolor, not because it had some nefarious motives as an imposter. And besides, Turkey Tail itself was named because of its resemblance to an actual turkey’s tail. And the poor Violet Toothed Polypore, which is in fact the most common of the three species, had the role of a third child, mentioned for its relationship to the other two.

When I arrived home, I headed to the log in question, picked off a piece of the overlapping fungus and flipped it over. It was clearly violet and toothy. As I celebrated the identification of Violet Toothed Polypore, I felt a tinge of disappoinment in myself for feeling a tinge of disappointment that it was not true Turkey Tail.

Yellow!

Yellow Stagshorn
Small Stagshorn fungus reaches a height of only four inches and is tapered on the ends of the spires.

This bright yellow fungus (calocera cornea if you care to know), commonly known as Small Stagshorn, is a petite relative of Yellow Stagshorn. It grows on rotting stumps and buried roots, quickening their decay. In a forest of greens, browns, and greys, its yellow spires scream out for attention. “Look at me!” When I first spotted a clump in a muddy bog, it seemed so audacious that I was immediately suspicious of its motives and didn’t dare to even touch it. Reading about it later, I learned that Stagshorn is in fact edible in the sense of being “non-toxic,” although it is both bland and gooey so that it is generally used only as a garnish. Even if it were described as being delicious, I would never dare to actually ingest it in case I was wrong in the classification, although I did go back to touch it. Who could resist when the various adjectives used to describe it read like an entry in Roget’s Thesaurus –- waxy, slimy, sticky, gelatinous, jelly-like, and viscous. Personally, I found it to be slightly icky.

Yellow Stagshorn growing on a stump

Eastern Skunk Cabbage

Symplocarpus Foetidus: smelly fruits


Skunk Cabbage Spathe

It’s March and there are hundreds of baby skunk cabbages in the creek along the Blue Trail. The “baby” is actually a reddish purple or mottled yellow shell (the spathe) that holds a cluster of flowers attached to a spike (the spadix). The spathes are miraculous little space heaters that keep the prenatal buds between 60° and 70° and as a side-effect, can melt snow or ice. This thermogenesis is accomplished by metabolizing starch that had been stored in the roots over the winter. A few weeks ago, several of these pointy gnomes were peeking through the snow.

Next to the purple shell, there’s what appears to be a second spathe that’s green, though it’s actually a curl of green leaves. These will unfurl to be a large stinky adult skunk cabbage. The plants have evolved to smell like dead animals to attract early garbage-loving pollinators such as some flies and beetles while repelling early forest carnivores such as deer and rabbit. The fetid odor is actually a good thing for us humans, since the leafy greens look good enough to eat, but would in fact make a poisonous salad.

Mottled Yellow Skunk Cabbage

Oak Apple Galls

Oak Apple Galls
Oak galls that housed wasp larvae. Note the escape hole!

I found these mysterious balls attached to an oak tree in the winter. They are galls– abnormal growths of a part of a plant that has been injected with insect eggs. In this case, the galls were destined to be oak leaves before they were injected with wasp eggs. Instead of developing into leaves, they grew into these lumpy spheres, each protecting a single a wasp larva.

Apple galls are so named because they start out resembling green apples. The wasps who make these particular galls are nicknamed “oak apple wasps.” A oak apple wasp starts life as a larva feeding on the roots of an oak tree. During the second spring of its life, it matures into a wasp without wings which climbs the oak tree and injects an egg into the veins of a leaf. The egg contains chemical instructions that turn the leaf into a protective cocoon for a fully mature adult wasp to grow. In the summer, the wasp drills an escape hole and emerges into the big wide world to fulfill its duty, which is to spend the remaining few weeks of its life finding a mate to begin the process all over again.

Blue-green Birch Twig

Birch Twig colored by chlorociboria
Birch Twig Colored Teal by Chlorociboria Fungus
Example of Blue-green wood in Intarsia
Chlorociboria stained wood used in Intarsia.

I occasionally come across fallen birch twigs that are a shocking blue-green color. Fellow hikers have had the same reaction that I had — that the color does not look natural ; someone must have dyed the wood.

When Museum curators saw that same hue in artwork by Italian furniture makers working in intarsia –- elaborate designs made with inlaid wood –- they too thought that the wood was dyed. However, scientific analysis of the artwork showed that the blue-green wood is an example of spalting – the coloring of wood by a fungus, in this case, the elf-cup Chlorociboria aeruginascens. Fifteenth and sixteenth century artists used the green wood to depict grass, leaves, bird feathers, animal eyes, and luxurious clothing. Back then, chlorociboria-infested wood was as valuable as precious metals.

Intarsia with blue-green wood
Intarsia with blue-green wood

Sutures on a White-tailed Deer Skull

White-tailed deer skull

This white-tailed deer might have been taken down by a coyote or died a natural death.

 

Although the skull is damaged, the zig-zag markings on the top are beautifully intact. Similar to spalting, which is a network of lines marking fungal boundaries in wood, these cranial sutures mark boundaries between bones.

When the deer was young, the sutures were fibrous areas that allowed the bones to expand. They also indicate stresses placed on the skull by chewing. In male deer, the largest sutures (the coronal pair that meander horizontally across the top of the skull) indicate the presence of antlers. The smaller wiggly line in the back of the skull is the lambdoid, and the vertical one extended towards the mouth is the sagittal suture.

Sutures on Deer Skull

Three Feathers in a Week

Three feathers; Cooper's Hawk, Northern Flicker, Blue Jay

I found these three feathers in the span of two weeks. The thing is — I wasn’t looking for them. When gifts from nature seem to fall from the sky onto my path, I can’t help but take it personally. Probably I was just looking more closely or maybe it was molting season. Whatever, these feathers buoyed my spirits.

Cooper’s Hawk, Northern Flicker, and Blue Jay

Using this feather identification tool from the U.S. Fish and Wildlife Service, I determined that the large striped feather was from a Cooper’s Hawk, the yellow from a Northern Flicker. And, though I couldn’t find the blue one, I think it’s from a Blue Jay.

Cooper's Hawk
Cooper’s Hawk
Northern Flicker Bird
Northern Flicker
Blue Jay
Blue Jay

Bird images from website AllAboutBirds

Revelation in a Piece of Wood

Slice of Spalted Wood
Spalted wood from a sawn tree.

This sliver of maple wood cut from a tree that fell over the Red Rectangle Trail looks like a map of some unfamiliar world so I was surprised to learn that it is exactly that. The squiggly black lines superimposed on the circular growth rings look like meandering rivers. Known as zone lines, they mark territorial boundaries between species of fungi competing for the dead wood. I felt a little sad to learn about this self-serving behavior of micro-organisms. The sadness made me realize that, even though I swear I never thought about it, I had assumed that fungi would share.

For more information on this process known as spalting, visit the Woodland Trust website or meet “Dr. Spalting” herself.