US Plant Patent PP7120
Fraxinus pennsylvanica Lednaw
PUBLIC DOMAIN
Patent expired October 3, 2008. This plant is in the public domain — anyone may propagate and sell it.
No term adjustment or disclaimer is recorded against this patent, so this is the full statutory term — twenty years from the filing date.
The record
- Patent number
- PP7120
- Filed
- October 3, 1988
- Granted
- January 23, 1990
- Expires
- October 3, 2008
No cultivar name of record
This patent does not name the plant. Through the 1980s and early 1990s that was still common: naming every new cultivar only became standard practice as plants began to be marketed under brand names. The grant identifies this one by its number and by a written description instead.
Nothing here is missing from our records: the patent itself states no name. Where one exists we show it, and we do not invent one.
Abstract
This new varietal sport of Fraxinus pennsylvanica summit green ash has been produced asexually from a sport branch of `Summit` green ash (Fraxinus pennsylvanica `Summit`) found growing on a tree at Madison, Wis. with the characteristic of many lateral branches growing from a main branch or limb axis. Propagation by me asexually from this sport produced vigorous straight-growing trees with a strong central leader, an adnormally high number of lateral branches, many appearing at three inch intervals on the main stem. These laterals grew in a strongly ascending manner producing semi-lustrous dark green foilage, turning yellow in the fall, and tree crown with a ratio of 15 to 20% of the height in width, much narrower than asexual progeny of Summit ash of the same age and size.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. A new and distinctive variety of Fraxinus pennsylvanica named `Lednaw`, as described and illustrated herein, that differs from all other varieties by the unique combination of: (1) very narrow colunmar growth habit; (2) dense symmetrical crown due to closely spaced, strongly ascending branches that overlap each other; and (3) leaves dark green and semi-lustrous above, paler below, turning yellow in autumn.
Read the full patent: US Plant Patent PP7120 in full — the complete specification, every figure, and the file history.