US Plant Patent PP18238
Appalachian Joy
Dogwood tree named ‘Appalachian Joy’
PUBLIC DOMAIN
Patent expired December 27, 2025. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on December 22, 2025. This patent earned 5 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP18238
- Filed
- December 22, 2005
- Granted
- November 20, 2007
- Expires
- December 27, 2025
- Assignee
- UNIV TENNESSEE RES FOUNDATION
- Inventor
- WINDHAM ALAN S; WINDHAM MARK T; TRIGIANO ROBERT N
Abstract
A new distinct cultivar of dogwood, Cornus florida L., named ‘Appalachian Joy’, is provided. This cultivar is characterized by resistance to powdery mildew, which is superior to most other cultivars of flowering dogwood and similar to ‘Karen's Appalachian Blush’ (U.S. Plant Pat. No. 13,165 P2), ‘Kay's Appalachian Mist’ (U.S. Plant Pat. No. 13,098 P2) and ‘Jean's Appalachian Snow’ (U.S. Plant Pat. No. 13,099 P2). It also is characterized by producing supernumerary (multiple [4-8]) bracts.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct cultivar of Dogwood, Cornus florida L., named ‘APPALACHIAN JOY’, as illustrated and described.
Read the full patent: US Plant Patent PP18238 in full — the complete specification, every figure, and the file history.