Spring Green

Spring green among the trees, Frick Park, 8 April 2021 (photo by Kate St. John)

10 April 2021

This week Pittsburgh’s sugar maples are clothed in spring green flowers while the oaks remain bare. Most trees bloom long before leaf out so their leaves won’t block the pollinators. These flowers take full advantage of the wind.

Sugar maple flowers, Schenley Park, 9 April 2021 (photo by Kate St. John)

Did your allergies kick in this week? The trees are throwing off lots of pollen with little rain to lay the dust.

Insect-pollinated flowers will follow soon. On 3 April pawpaw flowers (Asimina triloba) were still tiny buds in Schenley Park but by the time they bloom the stems will be long and flexible. The dark maroon fetid-smelling flowers will hang like bells to attract flies and beetles. Click here to see a pawpaw flower.

Pawpaw flower bud, Schenley Park, 3 April 2021 (photo by Kate St. John)

Eastern redbud flowers (Cercis canadensis) had not opened in Schenley as of 7 April, but they showed promise.

Redbuds, Schenley Park, 7 April 2021 (photo by Kate St. John)

Spring cress (Cardamine bulbosa) was blooming at Raccoon Wildflower Reserve on Easter Day.

Spring cress, Raccoon Wildflower Reserve, 4 April 2021 (photo by Kate St. John)

And Virginia bluebells (Mertensia virginica) were open in Schenley Park on 9 April.

Virginia bluebells, Schenley Park, 9 April 2021 (photo by Kate St. John)

This winter I noticed that when moss grows up the base of saplings it looks like leggings on the trees. At Raccoon Wildflower Reserve I found an entire group of saplings wearing mossy leggings. Click here to see the whole group. (Anyone know what this mossy phenomenon is?)

Mossy “leggings” on saplings, Raccoon Creek Wildflower Reserve, 4 April 2021 (photo by Kate St. John)

Spring green will continue in the coming weeks as tiny leaves pop open and more trees bloom.

(photos by Kate St. John)

1 thought on “Spring Green

  1. Nice photos and article Kate! I’ve been noticing the mossy “leggings” and wonder how long they take to develop and how it starts. I’ll have to keep an eye out for more of them and do some research. Thanks for your on-going blog.

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