Horlau Hydrangea Cultivar Bicolored Flowers and Dark Foliage

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Solution Overview

Problem

Current Hydrangea cultivars lack distinct bicolored flowers, strong stems, dark foliage, small leaves, and a robust root system, which are desirable traits for horticultural interest and durability.

Innovation Solution

The new Hydrangea macrophylla hybrid cultivar 'Horlau' exhibits bicolored flowers, strong stems, dark foliage, small leaves, and a good root system, differing from 'Weesenstein Bicolor' in height and flower bud induction, and was asexually reproduced via cuttings to maintain these characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional Hydrangea cultivars are used, then general growth is maintained, but distinct bicolored flowers, strong stems, dark foliage, small leaves, and robust root system are lacking

Engineering Contradiction:
Improvedistinctive traits retentionVSAvoidhorticultural interest and durability
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by selecting and propagating a mutant plant with altered genetic parameters that produce bicolored flowers (petaloids with distinct color zones), stronger stems, darker foliage, and smaller leaves. These parameter changes in the plant's biological characteristics create the distinctive traits that conventional cultivars lack.

Inventive Principle:
Principle #35Parameter changes

2Stability of the object's composition

If asexually reproduced via cuttings, then distinctive characteristics are retained, but propagation time and effort increase

Engineering Contradiction:
Improvetrait consistencyVSAvoidpropagation time
Core Design Contradiction:
Stability of the object's compositionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by performing asexual reproduction via cuttings early in the plant's development cycle. Rooted cuttings are established in controlled conditions (18°C for 15-20 days for root initiation and development) before being transferred to growing containers, allowing the distinctive traits to be locked in early and maintained through subsequent growth and flowering cycles.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUSPP19804P2Variety of Hydrangea plant named `Horlau`
Publication Date: 2009.03.10 HYDRANGEA BREEDERS ASSOC
  • USPP19804P2 patent drawing

AI summary

A new and distinct bicoloured Hydrangea plant having dark foliage and a fresh fragrance.