# Clones, Not Kinds: Imazio Nursery v. Dania Greenhouses and the Narrow Reach of Plant Patents

> The Federal Circuit held that infringing a plant patent requires asexual reproduction from the patented plant itself; an independently bred look-alike does not infringe.

Topic: Patents  |  Author: Lidiia Levitska  |  Source: Intellectual Property Law (outsideipcounsel.com)
Canonical: https://outsideipcounsel.com/blog/imazio-nursery-v-dania-greenhouses-plant-patent-asexual-reproduction/


A plant patent can feel like a paradox: it protects a living thing that reproduces, yet its reach is surprisingly narrow. In *Imazio Nursery, Inc. v. Dania Greenhouses*, 69 F.3d 1560 (Fed. Cir. 1995), the Federal Circuit explained why. In an opinion by Circuit Judge Giles Rich, one of the principal drafters of the 1952 Patent Act, the court held that infringing a plant patent requires asexual reproduction of the patented plant itself. Two plants can be morphologically and phenologically identical and still not infringe, because the statute reaches only the asexual descendants of the patented specimen, not every plant that happens to share its traits.

## At a glance

- **Case:** *Imazio Nursery, Inc. v. Dania Greenhouses; Coastal Nursery, Jess Rodrigues, and Donna Rodrigues*, 69 F.3d 1560 (Fed. Cir. 1995).
- **Court:** U.S. Court of Appeals for the Federal Circuit; opinion by Circuit Judge Rich, joined by Judges Mayer and Lourie.
- **Posture:** Appeal from the Northern District of California, which had granted summary judgment of infringement of U.S. Plant Patent No. 5,336 and found willfulness and awarded attorney fees.
- **Holding:** Under 35 U.S.C. § 161, "variety" means the specific patented plant and its asexual progeny; infringement requires asexual reproduction from the patented plant, so an independently created plant with identical characteristics does not infringe.
- **Significance:** Established that plant patents protect against cloning of the patented specimen, not against independent development of look-alikes, narrowing the scope of plant-patent protection.

## A heather called Erica Sunset

Bruno Imazio, owner of Imazio Nursery, obtained U.S. Plant Patent No. 5,336, titled "Heather Named Erica Sunset," covering a new heather variety he had developed. In 1992, Imazio sued Coastal Nursery and its principals, alleging that Coastal's "Holiday Heather" infringed the '336 patent. The district court agreed. It found that Erica Sunset and Holiday Heather were the same plant both morphologically, in their internal and external characteristics, and phenologically, in their blooming cycle, and concluded that Holiday Heather was an asexual reproduction of Erica Sunset. On that basis it granted summary judgment of infringement, found the infringement willful, and awarded attorney fees.

The case turned on what it means to infringe a plant patent. Coastal argued that even if the two heathers looked the same, Imazio had not shown that Holiday Heather actually descended from Erica Sunset; the similarity might reflect independent development rather than copying. That distinction drove the appeal, and it required the Federal Circuit to interpret the Plant Patent Act's key term: "variety."

## Two readings of "variety"

Section 161 grants a patent to "[w]hoever invents or discovers and asexually reproduces any distinct and new variety of plant." Imazio urged a broad, taxonomic reading: "variety" should encompass more than a single clone, so that a plant patent would cover all plants of that distinct variety, meaning every plant sharing the same essential and distinctive characteristics. Under that view, proving that Holiday Heather matched Erica Sunset's traits would establish infringement.

Coastal pressed a narrower, vernacular reading: "variety" means something different from others of the same general kind, tied to the specific plant the inventor asexually reproduced. Judge Rich's opinion canvassed the statute's text and the 1930 Plant Patent Act's history and adopted the narrow reading. The right protected, the court concluded, is the right to exclude others from asexually reproducing the patented plant, and "variety" refers to that plant and its asexual progeny, not to a botanical category. Plant-patent protection, in other words, is keyed to a particular living specimen and the clones taken from it.

## Why asexual reproduction is the dividing line

Because the protected subject matter is the asexually reproduced plant itself, the court held that infringement likewise requires asexual reproduction of that plant. An accused plant infringes only if it was asexually reproduced from the patented specimen, through cuttings, grafting, or similar means that yield a genetic copy. A plant that someone independently bred or discovered, even one indistinguishable from the patented variety, does not infringe, because it does not descend from the patented plant. Independent creation, ordinarily no defense in utility-patent law, is effectively built into the scope of a plant patent.

That holding undid the district court's analysis. Proof that the two heathers shared the same characteristics did not, by itself, prove that Holiday Heather was asexually reproduced from Erica Sunset, which was the fact infringement required. The Federal Circuit reversed the holding of infringement, vacated the finding of willfulness and the attorney-fee award, and remanded. The practical message for growers and breeders is that a plant patent is a shield against propagation of the patented plant, not a monopoly over a phenotype.

## Open questions

- **How is asexual descent proved?** *Imazio* makes descent from the patented plant the touchstone, but identifying when a specimen is a clone of another, as opposed to an independent match, can be evidentiarily difficult.
- **How distinct must a "variety" be?** The narrow reading ties protection to a specific plant, yet the line between the patented variety and a separate one is not always crisp in living, mutating organisms.
- **What gaps remain for breeders?** Because look-alikes bred independently escape plant-patent liability, the decision left open how innovators should protect plant traits more broadly.

## Implications

- **Plant patents protect clones, not kinds.** Infringement requires asexual reproduction from the patented plant; an identical-looking plant developed independently does not infringe.
- **Identity is not enough.** Showing that two plants share the same morphology and blooming cycle does not prove infringement without evidence of asexual descent from the patented specimen.
- **Independent creation effectively defends.** Unlike utility patents, plant patents leave room for those who separately develop a matching plant.
- **Consider utility patents for broader coverage.** Inventors who want to reach a trait or genotype regardless of descent may need a utility patent, which can cover plants by their characteristics.
- **Litigate the propagation chain.** Plant-patent cases should focus on the chain of propagation and evidence that the accused plant was cloned from the patented one.

## Frequently asked questions

**What did *Imazio* decide about plant patent infringement?**
It held that infringement of a plant patent requires asexual reproduction, meaning the accused plant must be descended, through cloning or similar means, from the patented plant itself. Independently creating a plant with the same characteristics does not infringe.

**Why does the word "variety" matter in the case?**
The court read "variety" in the Plant Patent Act narrowly, as referring to the single patented plant and its asexually reproduced progeny, not to every plant sharing the same essential characteristics. That narrow reading is why a separately bred identical-looking plant falls outside the patent.

**How is a plant patent different from a utility patent on a plant?**
A plant patent under 35 U.S.C. § 161 protects a specific asexually reproduced variety and is infringed only by asexual reproduction of that plant. A utility patent can cover plants more broadly by their genetic or trait characteristics and does not require proof of descent from a particular specimen.

## Authorities and sources

- Full opinion, *Imazio Nursery, Inc. v. Dania Greenhouses*, 69 F.3d 1560 (Fed. Cir. 1995) (Justia): https://law.justia.com/cases/federal/appellate-courts/F3/69/1560/610026/
- FindLaw case report: https://caselaw.findlaw.com/court/us-federal-circuit/1372054.html
- 35 U.S.C. § 161 (patents for plants) (Cornell LII): https://www.law.cornell.edu/uscode/text/35/161
- Casebook excerpt and analysis (H2O / opencasebook): https://opencasebook.org/casebooks/948-intro-to-intellectual-property/resources/17.1-imazio-nursery-inc-v-dania-greenhouses/