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

Our Earliest Aster

In much the same habitat as Virginia bluebells grows our earliest-blooming aster family species: Packera aurea (formerly Senecio aureus), commonly known as golden ragwort or golden groundsel. It starts blooming about the same time as the bluebells, but in the Potomac Gorge area seems to hit peak bloom just after the bluebells do.

Though they grow together, I’ve noticed that golden ragwort may have a bit more tolerance for slightly drier soils than the bluebells do. In some areas I can see that the land closest to the river is carpeted in bluebells, while a short distance away – on the other side of the trail, for example, where the land starts sloping upward – the carpet changes to ragwort.

Golden ragwort is a colony-forming perennial forb that grows to about two and a half feet tall. The flowers are borne on a corymb ( a more or less flat-topped cluster) and have the typical aster family arrangement of ray flowers and disk flowers.

 

The basal leaves are oval with a cordate base and have scalloped edges and long petioles.

 

 

 

The stem leaves are completely different: narrower, deeply lobed, and sessile or clasping.

 

 

Golden ragwort is one of 57 Packera species native to North America. Look for it growing in moist to wet woodlands in the mid-West, mid-Atlantic, New England, a few parts of the South, and eastern Canada.

The Earliest of the Asters: Golden Ragwort

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Packera aurea (formerly Senecio aureus); Asteraceae

Based on a few years’ observations, I’ve concluded that about one in five flowering plants in the Potomac Gorge are in the aster family.  But most of them won’t start showing up until summer.  Golden ragwort is always the first.

It’s an interesting plant.  The basal leaves appear first: toothed, rounded to oval and indented at the base, they are totally different from the stem leaves, which are elongate and deeply lobed.

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The buds are deep purple, opening to golden blossoms.

Golden ragwort forms vast stands in moist bottomlands throughout the eastern US and Canada, blooming about the same time as wild blue phlox and as the Virginia bluebells start to fade.

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