• The Library will be closed on Thursday, July 4th and Friday, July 5th in observance of Independence Day.


  1. Michael Crichton Film Series – Andromeda Strain

    September 9, 6:30 pm - 9:00 pm
  2. How Do I Become an Engineer?

    September 14, 9:30 am - 12:00 pm
  3. How To: Absurd Scientific Advice for Common Real-World Problems

    September 16, 7:00 pm - 8:00 pm
  4. Science Matters Brown Bag Forum: Renew the Blue

    September 18, 12:00 pm - 1:00 pm
  5. The Evolution of the Human Form

    September 18, 7:00 pm - 8:00 pm

Tree Peonies

The peony gardens are located on the northeast side of the grounds and are open to the public from dawn to dusk.

One of the earliest accounts of tree peonies was written by Ou-yang Hisu (1007-1072) and is titled “Record of the Tree Peonies of Loyang.” In this account Hisu says “as for the tree peony, this has no name but is merely referred to as ‘flower,’ meaning that in the empire the tree peony is the only true flower.” This record included names and descriptions of twenty three cultivars about which Hisu says, “… I now record only the most outstanding varieties, and rank them in order.”

Facts About Tree Peonies

  • Linda Hall Library’s collection of tree peonies was started in the early 1970s.
  • Tree peonies are propagated by grafting a tree peony bud onto an herbaceous peony root.
  • Tree peonies are not really “trees” but are deciduous shrubs.
  • In their native habitat in China, they can reach eight to ten feet tall.
  • In the United States they will grow in zones 4-8, requiring some winter weather in order to bloom.
  • The largest shrub on the grounds of Linda Hall Library is about 5′ tall and 5-6′ wide.