Quick Carderock Update

I had a quick look around the Carderock area on Friday (March 29), and saw the following plants blooming or budding. Also had fun taking closeup shots.

Arabidopsis lyrata (lyre-leaved rockcress): a few flowers  –>

 

Boechera laevigata (smooth rockcress): buds
Cardamine angustifolia (slender toothwort): buds

<–Cardamine concatenata (cut-leaf toothwort): flowers

Claytonia virginica (spring beauty): lots of flowers
Dicentra cucullaria (Dutchman’s breeches): a lot of buds, a few flowers

 

 

Dirca palustris (leatherwood): full bloom –>

 

 

 

<–Erythronium americanum (trout lily): gobs of leaves; 5 flowers

Lindera benzoin (spicebush): flowers

 

 

 

Mertensia virginica (Virginia bluebells): lots of buds, just a few open flowers    –>

 

 

 

<–Micranthes virginiensis (early saxifrage): full bloom

The next few weeks should be spectacular.

Late March

Things are still moving along slowly in the Potomac Gorge, but with warmer weather coming I expect the show will really get going soon.

On March 25 I found large patches of harbinger-of-spring blooming near Billy Goat B.

 

The bluebell buds should open in the next few days.

 

 

 

 

A few cutleaf toothwort are out, and lots of spring beauties, of course. Spicebush is also starting to bloom.

 

 

 

And there were several bloodroots flowering near Old Angler’s.

See LW’s comments on the last post for an update of the area around Carderock.

Slowly

Thanks to a heads-up from a friend, I was able to get out to Billy Goat C for a little while a few days ago and shoot harbinger-of-spring. Still not much else to report, except more spring beauties are opening. Also happy to report that parks personnel are applying herbicide to lesser celandine, a particularly nasty invasive alien that hides behind cheery yellow flowers; plants quickly form a monoculture and are difficult to eradicate.

I also hiked about 2/3 of Billy Goat B. High water made it tricky in one spot, and I bailed before getting to the area where the worst damage is, but the trail has finally reopened. I saw nothing blooming there except spring beauties. But with warm weather, plants will emerge and bloom fast.

Interested in finding bloom dates for particular species? Scroll to the top and pull down the menu for plants by either common name or binomial to see observed bloom times in past years.

I Am So Ready

What a winter this has been! Temperatures bouncing around, crazy amounts of rain, or sleet, or snow, or any combination of the three… My favorite trails are all a mess of slick mud.

<–a single harbinger-of-spring plant emerging on March 6, 2019

blooming (February 28, 2018) –>

 

 

 

 

Nonetheless I’ve taken a few quick hikes to see if anything’s coming up yet. Last year on March 5, round-lobed hepatica was blooming on the Cabin John Trail, along with a single incredibly early Virginia bluebell. This year on March 5, I saw a single clump of hepatica leaves, without buds.

^ one spring beauty with two buds, March 6, 2019

blooming (April 10, 2018) –>

 

 

On the Billy Goat trails last year I saw the earliest harbingers-of-spring and spring beauties on February 28. This year on March 6, I saw a single harbinger plant barely up, one spring beauty with two buds, a single golden ragwort budding up, and quite a few Virginia bluebell plants poking out of the mud.

^ golden ragwort in bud, March 6, 2019

 blooming (April 5, 2017) –>

 

 

 

It’s going to be an interesting year. Flood damage in the Potomac Gorge is the worst I’ve seen in six years of monitoring the area. Alien invasives are starting to emerge from the mud and sand; did the floods do any real harm to those populations? Will that allow the natives a chance to grow better, or were they equally affected?

^ Virginia bluebells emerging from the mud, March 6, 2019

a stupidly early Virginia bluebell opening on March 5, 2018 –>

 

Hang in there, friends –spring is almost here.

Virginia bluebells carpeting the floodplain (April 10, 2017)

Compressed (part 2)

Here are some of the showier spring ephemerals to watch for in the Potomac Gorge this week.

In the floodplain close to the river, Virginia bluebells (Mertensia virginica; left) are approaching peak bloom. Mixed in with them in a few places are Dutchman’s breeches (Dicentra cucullaria; below right), which you might also find on moist, rocky outcroppings.

Trout lilies (Erythronium americanum; above left) like moist soils, too. Generally I see them in the transition areas between floodplain and slopes.

Further upslope are cut-leaf toothworts (Cardamine concatenata; left).

 

On drier slopes watch for scattered patches of bloodroot (Sanguinaria canadensis; below).

 

 

Look for twinleaf (Jeffersonia diphylla; below) in moist, rocky areas. They like limestone soils, so aren’t as widespread as these other species, but where they do grow they they tend to grow en masse.

Spring beauties (Claytonia virginica; below) are just about everywhere.

 

 

 

 

More tomorrow.

On the Last Day of Winter

Today is the first day of meteorological spring* (astronomical spring is still three weeks away), but as of yesterday, the 28th of February, the wildflower show had already begun along the Potomac. Barely.

Claytonia virginica (spring beauty; Montiaceae)

Just a few dozen of these were up in sheltered locations.

This one specimen of Packera aurea (golden ragwort; Asteraceae) already had well-developed buds. Often this species will retain leaves through the winter, and many low-lying leaves were visible, but I saw none of the tall growth yet. In the same location last year just a few flowers were open on March 23, with peak bloom about April 13; in 2015, I saw the first ones March 24, with peak bloom in mid-April.

Erigenia bulbosa (harbinger-of-spring; Apiaceae)

More about this in an upcoming post. Can you see it sheltering there under the maple leaf? That’s one plant with about 14 flowers!

A few alien species are starting to bloom: Veronica hederifolia (ivy-leaved speedwell) and Cardamine hirsuta (hairy bittercress).

And, I saw one clump of Mertensia virginica (Virginia bluebells) foliage emerging, but that makes a boring photo.

*more on meteorological seasons from NOAA