Species of the Week
Number 30 --
March 5, 2007

In the Species of the Week feature of the Wildwood Web we took a close look at one of the species that lives in Wildwood.  To see the earlier featured species check the Species of the Week archives.

 

Coltsfoot

Tussilago farfara

Coltsfoots, the first showy flower to appear in Wildwood in the spring, are already starting to bloom.  The large, dandelion-like flowers appear in March, poking up through the leaf litter of the previous fall, on fat downy white stalks.  At this time, they have only small, reddish, scale-like leaves on the stems, visible in the picture at left.  Larger, green, heart-shaped leaves, with irregular edges, appear later, after the flowers have gone to seed, and persist through the summer.  The seeds are also dandelion-like, as seen in the picture below.

Coltsfoots, and dandelions, for that matter, are in the Asteraceae, the Sunflower Family.  We met a number of members of that family as Species of the Week, last year.  It is one of the most common families in the Park.  However, members of this family tend to be autumn-bloomers.  Coltsfoot is unusual in blooming early in the spring.  Members of the Asteraceae have two kinds of flowers, as we saw last year.  What most people think of as the flower, is really a cluster of flowers, tubular disc flowers in the center, and long strap-shaped ray flowers around them.  Coltsfoots have both kinds of flowers, about 100 to 300 ray flowers surrounding about 20 to 40 disc flowers.  Both kinds of flowers are bright yellow, as seen in the picture at the bottom.  Interestingly, coltsfoot "flowers" close up at night.

Coltsfoots are perennials, coming up year after year from the roots.  The roots spread each year, forming an ever expanding colony.  In Wildwood, there is a colony in the wide quarried area just past the gate.  It is on the eastern side of this wide area, at the base of the cliffs.  The plants may also be found along Wildwood drive, and along the Riverway, at the north bridge.  There is also a cluster very near Main Street, under the cliffs north of the weeping tufa formation.

     

Coltsfoot is our first Species of the Week that is not native to Virginia.  It is native to northern Africa and temperate Eurasia.  It hitchhiked to America with European colonists and has spread so that it can now be found from Labrador west to Ontario and Minnesota, south to Tennessee, and North Carolina.  It has also made it to Washington state and British Columbia.  It likes disturbed sites and roadsides.  It is especially fond of sandy and rocky soil, and likes calcareous soils like those in Wildwood.  It is considered an invasive weed in some places, meaning that it spreads into native habitats, competing with and forcing out the native plants.  However, in Virginia it appears to be able to establish its colonies only along roadsides and bikepaths, and so does not threaten native plants.

The leaves and flowers of coltsfoot were used to make a tea that was believed to be useful in treating coughs, colds, and bronchitis.  The leaves were also smoked to treat bronchitis and coughs, although it would seem to me that this treatment itself might lead to serious coughing.  An extract of the flowers has been used to dye wool yellow-green.

 
 
  The genus name Tussilago is believed to be derived from the Latin, tussis, meaning "cough," and alluding to its medicinal uses.  The species name farfara comes from farfarus, the Latin name for the plant.  The common name comes from a fancied resemblance of the leaves to the hooves of a colt.  In Quebec and in France, the plant is known as pas d'âne, meaning ass's foot, so the resemblance has been noticed in other countries as well.

Although coltsfoot is not native to this area, it is a beautiful flower and brings cheer and hope when it first appears in the dreary March.  We should welcome its blooms.

GGC

 


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