The daughter of a Marine Corps band leader and a homemaker, Catherine Foote was born in Washington and was raised there and in Haiti and California.
After graduating from Woodrow Wilson High School in Washington in 1937, she earned a bachelor's degree in 1941 in biology from the University of Maryland, College Park. In 1943, she earned a master's degree in biology from Mount Holyoke College.
From 1943 until the late 1940s, she was a research assistant to Dr. Eleanor Delfs and Dr. Georgeanna Jones in the departments of gynecology and obstetrics at the Johns Hopkins University and Hospital.
She was married in 1948 to Dr. Edward Henderson Richardson Jr., a gynecologist. He died in 2010.
For years, the couple lived on North Wind Road in Ruxton, where Mrs. Richardson amassed one of the largest and most diverse holly collections in Maryland. Her collection numbered nearly 100 hollies, family members said.
Mrs. Richardson, who moved to Roland Park Place in 2009, was a life member of the Holly Society of America and had served as the society's secretary from 1981 to 1991.
She was a past president of the Guilford Garden Club and had served as a horticultural judge and zone chairman. She had also served on the board of the Garden Clubs of America and been a member and officer of the Maryland Daffodil Society.
In addition to horticulture, she enjoyed reading, sewing, cooking and vacationing on Nantucket Island.
A memorial service will be held at 3 p.m. Friday at St. Andrew's Christian Community, 5802 Roland Ave.
Mrs. Richardson is survived by a son, Edward H. Richardson III of Cross Keys; two daughters, Nancy P. Richardson of Towson and Linda R. Parsons of Wichita, Kan.; and three grandchildren.