Category: Invasive Species

Hoarfrost

The cold temperatures of winter can create such works of wonder. Often so delicate they can’t be touched for fear of destruction.

Occasionally the beauty makes me forget that what I am looking at, such as these rose hips of Multiflora Rose (Rosa multiflora), is something that I work diligently to rid my woods of. A very aggressive invasive that has the nerve to mimic our native blackberries during their times of blooming. But frosted during the cold of winter it has its charm. AND take a look at that image again. There is an undulating line of frost that starts on the left, about 1/4 of the way down that goes to the right, from that first rose hip, on to the second and then the third as it drops and then ends. THAT is a spider web also decorated with frostiness.

The berries of Smooth Sumac (Rhus glabra) with its frost rivals ANY image of a Cardinal in the snow. Glorious red with stark white. Perfection.

With the hoarfrost the needles of Virginia Pine (Pinus virginiana) each get their own personal set of needles.

The leaves of young White Oak (Quercus alba) don’t drop as most deciduous leaves do in the fall, but hang onto them until late spring. That gives them the chance to be dressed up. To be decorated by the spines of ice. The artwork of Mother Nature.

Jeffersonia or Twinleaf

Jeffersonia (Jeffersonia diphylla). In 1792 the botanist Benjamin Smith Barton named this plant after Thomas Jefferson. In 1807 Jefferson had Jeffersonia growing in one of the oval flower beds of Monticello. I’m proud to have something in common with my neighbor Thomas.

Within a matter of four weeks I’ll be searching for these little signs of life. Hints of spring sprouting up from the garden’s soil.

It took missing the arrival of Jeffersonia for a few springs before I etched into my memory to be on the alert. They arrive when there is still snow around. In my gardens generally mid to late March.

Jeffersonia is native to eastern North America but is listed as a threatened or endangered plant in Georgia, Iowa, New York, and New Jersey because of habitat destruction and invasive species.

The flower of Jeffersonia is atop a bare stalk. It’s composed of eight white petals which as a bud were protected by four sepals. Two of those fading sepals can be seen here drooping below the flower, a washed out pale purple with a slight hint of green.

The petals surround yellowish stamens and in the center a green ovary. Quite the fleeting bloom, the petals fall after just a couple days.

A common name for Jeffersonia, Twinleaf, comes from the shape of the leaf. Open butterfly wings. Each pair, one leaf nearly split in two.

The flowers as they decline produce a fruit. A fruit that brings a smile to my heart. Is it a fruit or actually a smiley outer space alien?

The seeds inside this capsule each have an appendage called an elaiosome which attract ants with its lipids and proteins. The ants carry the seeds to their underground nest where the elaisomes are fed to their larvae. After the feeding, the seeds are discarded in the ant’s nest to their “trash room.” The perfect place for seeds to grow. ANT FARMERS! If you would like to add a fancy word to your vocabulary, this whole process of “ant farming” is called myrmecochory.