US Plant Patent PP4761
Euphorbia plant
PUBLIC DOMAIN
Patent expired October 16, 1999. 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
- PP4761
- Filed
- October 16, 1979
- Granted
- August 25, 1981
- Expires
- October 16, 1999
- Inventor
- STIRNADEL ALFRED
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
A new variety of Euphorbia plant, being an asexually-reproduced hybrid of Euphorbia lophogona and Euphorbia milii which produces flowers in biaxial ramification, the clusters of which are up to about 15 cm in length, the flowers being yellowish in color and the bracts being up to 32 in number and from salmon pink to luminous salmon red in color, the plant being further characterized by an "ever-blooming" quality, under suitable environmental conditions. Propagation of this new variety is enhanced by control of environment to provide 1000 lux artificial light for a 121/2-hour day at temperatures from 22°-25° C. and humidity 60-90 percent.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. A hybrid plant of the genus Euphorbia, substantially as herein shown and described and particularly characterized in that it is the result of crossbreeding between a plant of the Euphorbia lophogona species, as the mother plant, and a plant of the Euphorbia milii species, as the father plant, and exhibits the following characteristics: succulent stem with 4 to 5 ridges on which small nodes occur at 2 cm intervals bearing up to 10 red-brown thorns 2 cm in length; blossom clusters up to 15 cm in length form at each new leaf axis and bear up to 32 single blossoms each having two salmon pink to luminous salmon red bracts on light green stalks up to 3 mm in thickness; layered configuration of each blossom cluster whereby, as a rule, two new blossoms develop from each single blossom; the alternately arranged spatulate leaves are slightly pulpy, about 15 cm in length and up to 5 cm in width with a short stalk, said plant being further characterized in that, in the appropriate environment, the plant will bloom uninterruptedly.
Read the full patent: US Plant Patent PP4761 in full — the complete specification, every figure, and the file history.