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Members of Asteraceae that share a smaller number of very similar characteristics are grouped into genera.Each genus is comprised of a number of species that share an even smaller group of similar characteristics.Some people say "Peas", some "Beans", some "Legumes" or "Vetches" or "Milk Vetches".
(Now thats a very good reason for not using common names.) Remember this when you look at plant identification books.
Most authors will tell you that they have made up a number of common names just for publishing in their book.
The first word designates the "genus" to which the plant belongs and the second, called the "specific epithet" or "species epithet", or "species name", gives a name to distinguish this plant from all others in the same genus.
For example, in the name Senecio serra, "Senecio" is the genus and "serra" is the specific epithet.
Very often that made up common name is just a rearrangement of the scientific name, for instance, the scientific name Phacelia fremontii becomes Fremont's Phacelia.6) Plants with common names always have several common names because names vary from person to person, region to region, and country to country.
Thus, using common names frequently leads to misunderstandings and arguments.7) In a number of instances, the same common name refers to several different species, not to one specific plant: There are many "Bluebells", "Paintbrush", "Goldenrod", "Daisy", "Groundsel", "Geranium", "Chickweed", "Fir", "Pine".
Following are the family shifts that affect plants found on this web site. You will notice that a few families have several commonly used names: Asteraceae is called the Sunflower Family, Aster Family, Composite Family, or Daisy Family. There is no organization that sets standards for common names, but the following names are widely accepted across the United States. Even at the plant family level, there is confusion in common names.
Each person makes the decision about how accurate and detailed they want to be in understanding plants. One person says "Sunflower Family", another says "Aster Family", another "Daisy Family", and another " Composite Family".
Johns Wort"), or refer to a plants resemblance to another plant ("False Solomons Seal", "False Hellebore"), or are given because they remind human beings of something ("Butter and Eggs", "Monkey Flower"), or are assigned for some real or imaginary medicinal property ("Lousewort", "Self-Heal").
3) Although I have pointed out that one major problem with common names is that they vary so much, there are some common names that are fairly standard and widely understood: Oak, Pine, Sycamore, Ash, Dogwood, Mullein, Thistle, Poison Ivy.