Intestine seaweed

There’s a species of seaweed that grows along the coast here in Cohasset with the scientific name Ulva intestinalis; so named because it looks like intestines. A common English name for it is Gutweed, though I’d rather call it Intestine seaweed.

Anyway, it’s one of my favorite seaweeds. How could I not like something that looks like little green intestines?

Strands of green tubular seaweed lying on a rock.

Jack-in-the-pulpit

Today while walking in the Attleboro Springs Audubon Sanctuary, I saw Jacks-in-the-pulpit (Arisaema triphyllum) in bloom. The dramatic striped spathe shelters a spadix on which the flowers are born. This is one of my favorite native flowers — we used to grow them when we lived in the rental share in Concord center — and seeing their blooms today prompted me to learn a little more about them.

According the Extension service of North Carolina State State University, individual Arisaema triphyllum plants can change between male and female from year to year: “This unique plant, which is pollinated by flies and gnats, has the ability to change gender.  A plant that starts out as male can spontaneously change to female the next year and vice versa. …”

Or, according to another source, first year plants only produce male flowers; then the plant becomes hermaphroditic, producing both male and female flowers. In any case, as is so often true, our stereotypical human norms around gender and biological sex being determined from birth do not apply to all organisms (the stereotypes don’t even always apply to human organisms).

A fascinating plant. Makes me want to start growing Arisaema triphyllum again.

Jack-in-the-pulpit (Arisaema triphyllum). Note the two trifoliate leaves, the striped spathe, and the pale green spadix inside the spathe.

Urban gulls…human shouting…

In the Mass Audubon class I’m taking, tonight’s lecture was on birds. We learned about a scientific paper titled, “Urban gulls show similar thermographic and behavioral response to human shouting and conspecific alarm cries” (Frontiers in Ecology and Evolution, 20 Sept. 2022). Equipment used in this research included a plush Cornish pasty and a child’s baby carriage with an infrared camera hidden inside it. No, I am not making this up. Apparently some ornithologists manage to have a sense of humor while doing serious science.

Young owl

I was out for a walk at dusk in nearby Wheelwright Park, and heard a strange sound coming from a nearby tree — a sort of whiny “cheep” kind of sound. I looked up, and there was a juvenile Great Horned Owl about 10 meters up.

The fading light made it hard to see much, but the bird appeared to have well-developed flight feathers. The prominent ear tufts which are characteristic of adult Great Horned Owls were just starting to form. And the plumage was a lighter color than adult plumage. So my guess is that this was a young owl out for one of its first forays from the nest.

As I stood watching it — and trying to take photos with my smartphone — I thought I heard another owl cheeping from a tree farther away. It seems like there were two young owls out trying out their new wings.

An owl sitting on a branch partway up a tree, at some distance from the camera. The light is dim, and the photo is pixelated and of poor quality.

Spring chorus

On Friday when I went for a walk in Whitney Woods here in Cohasset, the marshes were silent. On Saturday, I heard a chorus of frogs calling from a couple of marshes and one vernal pool. When I returned on Sunday, the temperature had dropped 20 degrees, from about 54 degrees to the mid-30s. There were a lot fewer frogs calling on Sunday, but some were still singing away. They sounded like a bunch of ducks gabbling together.

Whenever I tried to get close enough to see them, all I ever saw was a circular ripple where a frog slipped underwater. Nevertheless, identification was relatively easy. Here’s the description of the voice of the Wood Frog (Rana sylvatica) in the Peterson Field Guide to Reptiles and Amphibians: “A hoarse clacking sound suggesting the quack of a duck.” Another source says: “from a distance, a chorus [of Wood Frogs] sounds like a gathering of miniature ducks quacking.”

I’ll let you decide if they sound like ducks or not. Here’s my lo-fi audio recording:

Sign of spring

I went for a walk at the Norris Reservation in Norwell, Mass., today. Walking around Gordon’s Pond, I saw Skunk Cabbage (Symplocarpus foetidus) beginning to sprout. Perhaps two dozen tightly curled green and purple spathes dotted the ground on either side of the boardwalk. One of the spathes had opened, revealing the spadix inside, with tiny little flowers blooming on it. This is the first native flower I’ve seen since the Witch Hazel bloomed in December.

A close-up of a Skink Cabbage inflorescence inside its purple-and-green spathe.

Eagles

We went out for a walk along the river that runs through Oshkosh, Wisconsin, today. A Bald Eagle soared overhead, landed in a tree, and soared off again when we got too close. Then a couple of minutes later, there was another Bald Eagle ahead of us, sitting in a tree.

It was breathtaking to see Bald Eagles that close. But we shouldn’t be seeing any eagles over the river in Oshkosh in January. Instead, the river and the lakes should be fully frozen over, driving the eagles to Lake Michigan to find open water for hunting. It has been such a warm winter, the river is almost completely ice-free. So while I love seeing the eagles, we’re seeing them because of global climate change, which is not a cheerful thought.

Lichen

Granitic rock with a gray-green crustose lichen growing on it.
Porpidia albocaerulescens?

This crustose lichen caught my eye while out walking today. I was especially taken by the dramatic apothecia, those dark gray spots outlined in a very dark gray. Unfortunately, I didn’t bring my hand lens with me, so I couldn’t take a good close look at the apothecia. But here’s what they look like when I blow up the photo:

Close-up of the above photo, showing the cup-like apothecia a little bit better.

I believe this lichen is Porpidia albocaerulescens, which is sometimes called the Smoky-eyed Boulder Lichen. However, identifying crustose lichens accurately seems to require a rock hammer (to get the sample off the rock) and a chemistry set (to carry out the chemical tests used for identification).

#FungiFriday

Asters

For the past month and a half, I’ve been looking for flowers in the aster tribe (Tribe Astereae). I’ve always liked asters. I don’t know why. There’s something about the off-white and pale lavender colors that gets to me.

Flowers in tribe Astereae, probably genus Symphiotrichum

I guess it’s a kind of spiritual experience when I see asters in bloom. Whatever “spiritual” means.

Flowers in tribe Astereae

I’m not able to tell which species of aster I’m looking at. In the genus Symphiotrichum alone, there are 27 species native to New England. Go Botany has a dichotomous key for Symphiotrichum. However, for some species the key requires 14x magnification of the bracts and disk flowers, but all I have is a 10x hand lens.

Flowers in tribe Astereae, probably genus Symphiotrichum

Nevertheless, I should sit down with one of these plants and try to work through the key. Not that it matters what species I’m looking at. Not that it will make the flowers any more (or less) beautiful. But why not observe them more closely?