Daisy, Dandelion, Viola, Mullein; these are names that many of us are familiar with and use in every day language.
Common names can cause confusion when communicating with others especially when discussing edibility and medicinal qualities of an herb so it's important to know and use the botanical name.
Botanical names are italicized and are what we refer to as binomial (two names). The first name is the genera and is capitalized with the species coming second which is lower case.
~Mon