I've been out in Larimer County Parks, checking out sites for spring wildflower walks. I took lots of pictures to get a head start identifying the common plants on those trails. I thought my walks to be "early spring drab" ... then I reviewed my slides.
The trail beckons
south end of Sundance Trail, Carter Lake
The larkspurs (Delphinium species) of North America are tall plants with curiously-shaped flowers in purple, blue or white. (Earlier blog, featuring American larkspurs link)
It was clear when researching American larkspurs that there were similar European plants because, well, the name larkspur is based on the flower looking like a lark's foot, but North America doesn't have a common bird we call a lark. The lark of England, more formally the Eurasian skylark Alauda arvensis,was a well-known and conspicuous bird of farmlands. Its numbers are drastically down recently and farmlands have retreated so perhaps it is not as well known as in the pastlink.
I've been drawing attention to problems in looking up plants online by their common names. Here is one final issue with common names: they are often regional. That means you can find the same name on a different plant if you are in a different part of the United States. Or not find useful websites because on those websites they use a different common name.
For example, looking at plant books from different regions, I find two goatsbeards, Aruncus dioicus (see photos I don't have one of my own) and Tragopogon spp. (above and photos). Aruncus grows across the eastern US., Canada and along the West Coast (USDA maps, description at Missouri Botanic Garden). Tragopogon grows there too, but eastern U.S. books it is called salsify or oyster plant. Aruncus is not found in the central U.S., and in some plant identification books from here, it is Tragopogon that is called goatsbeard. I believe the name goatsbeard for Tragopogon came with it from Europe (see Culpeper, Grieve). Aruncus is an American species, more recently named goatsbeard, for the way it looks. Currently, the USDA plants website has Tragopogon as goatsbeard and Aruncus as bride's feathers while the Flora of North America calls Aruncus goatsbeard and Tragopogon salsify. No knowing what you'll get if you ask for goatsbeard.