Hydrangea SMHMEPSILON Breeding for Lace-Cap Inflorescence and Early Flowering

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Solution Overview

Problem

There is a need for new Hydrangea varieties that exhibit unique horticultural traits such as lace-cap inflorescence, early flowering, and strong continuous blooming, which are not adequately addressed by existing cultivars like Hydrangea macrophylla 'Robert' and Hydrangea 'MAK20'.

Innovation Solution

The development of the Hydrangea hybrid cultivar 'SMHMEPSILON' through open pollination breeding, characterized by lace-cap inflorescence, early flowering, and strong continuous blooming, which differs from its seed and pollen parents in these traits and is stable across multiple generations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If Hydrangea macrophylla 'Robert' is used as seed parent, then strong plant vigor and large leaf size are achieved, but mophead inflorescence type and late flowering are produced

Engineering Contradiction:

Improveplant vigorVSAvoidinflorescence type

Core Design Contradiction:

StrengthVSShape

Solution Approach 1:

The breeding program segmented the selection process by evaluating multiple seed parents with different inflorescence types (mophead, lacecap, panicle) and systematically crossing them with 'Robert' to separate the vigor trait from the unwanted mophead inflorescence type, ultimately selecting lacecap and panicle types that complement the strong plant vigor

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by selecting for specific inflorescence types (lacecap and panicle) in certain plant regions while maintaining overall plant vigor, creating localized floral quality improvements without compromising the strong growth characteristics inherited from 'Robert'

Inventive Principle:

Principle #3Local quality

2Loss of time

If Hydrangea 'MAK20' is compared, then early flowering is achieved, but shorter plant height and smaller inflorescence width are produced

Engineering Contradiction:

Improveflowering timeVSAvoidplant height

Core Design Contradiction:

Loss of timeVSLength of stationary object

Solution Approach 1:

The patent merges the early flowering characteristic from MAK20 with the tall plant height and large inflorescence width from 'Robert' through controlled crosses, creating a composite variety that combines the temporal advantage of early flowering with the dimensional advantages of larger plant size

Inventive Principle:

Principle #5Merging (Combining)

3Shape

If lace-cap inflorescence is selected, then unique floral morphology is achieved, but reduced flower production per inflorescence is observed

Engineering Contradiction:

Improveinflorescence morphologyVSAvoidflower production

Core Design Contradiction:

ShapeVSQuantity of substance

Solution Approach 1:

The patent achieves multi-functionality by selecting lacecap inflorescence types that simultaneously provide unique floral morphology and maintain adequate flower production, creating inflorescences that serve both aesthetic and reproductive functions effectively

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUSPP28698P3<i>Hydrangea </i>plant named ‘SMHMEPSILON’

Publication Date: 2017.11.28 SPRING MEADOW NURSERY INC

AI summary

A new and distinct Hydrangea cultivar named ‘SMHMEPSILON’ is disclosed, characterized by lace-cap inflorescence, early flowering and strong, continuous blooming. The new variety is a Hydrangea, normally produced as an ornamental plant for containers or gardens.