Flowering Dogwood

20150429-20150429-_DSC0111Cornus florida; Cornaceae

This graceful, small ornamental tree is a native of eastern US forests, where it grows in the understory. It ranges from southern Maine (where it’s endangered), Vermont (where it’s threatened) and New York (where it’s exploitably vulnerable) to Texas.

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Some dogwood facts:

  • Dogwood is the state tree of Missouri, the state flower of North Carolina, and the state tree and flower of Virginia.
  • The United States sent 3000 dogwood saplings to Japan on the 100th anniversary of Japan’s gift of the cherry trees which grace our national capital.
  • Dogwood is pretty easy to grow and is a common landscape tree in the eastern US, but it is prone to pests, including borers, powdery mildew, cankers, crown rot, and the dreaded anthracnose, a fungal disease caused by an organism believed to have been introduced to the US in 1978, but of unknown origin.
  • Dogwood is considered a soil improver, because the leaves decompose much faster than other trees’ leaves do.
  • The wood is extremely hard and shock-resistant.  Pacific dogwood makes great firewood because of its high BTU value, though it is difficult to split.  (I can’t find any similar data for C. florida, though.)

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And, see those little yellow things in the center?  Those are the flowers.  The white parts that look like petals are actually bracts (modified, colored leaves).

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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