The Conversation: String theory: scientists are trying new ways to verify the idea that could unite all of physics String theory: scientists are trying new ways to verify the idea that could unite all of physics Native range: A. hubrichtii, A. taber naemontana, and A.

Understanding the Context

ciliata are widely celebrated North american natives, while lesser-known Amsonia species such as A. orientalis are found around the world. Amsonia is an erect clumping perennial that has beautiful and delicate blue star-shaped flowers that bloom in March, April and May as a cluster. Each flower has four to five petals.

Key Insights

Amsonia is a genus of clump-forming herbaceous perennials with multiple leafy stems growing from a semi-woody rootstock. Plant height varies from 12.5cm to nearly 1.2m. Amsonia is principally a native genus of North America, with one species each in eastern Asia & the eastern Mediterranean. Amsonia commemorates Dr. Charles Amson, an 18th century Virginia physician.

Final Thoughts

There are about 22 species ranging from 1-3’ in height with prostrate to erect stems. Figure 1. Hypothetical distributions for Amsonia kearneyana (red), A. palmeri (purple), A. tomentosa (blue), A. fugatei (orange), A.

tharpii (green), A. longiflora (yellow), A. grandiflora (black), A. peeblesii (light blue), A.