Jefspur Dwarf Amur Cherry Cultivar for Compact Landscaping
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Solution Overview
Problem
Existing cultivars of Prunus maackii, or amur cherry trees, lack compact growth habits and unique characteristics that can enhance their use as landscape plants, particularly in urban settings, where space is limited and distinct aesthetics are desired.
Innovation Solution
The 'Jefspur' cultivar, discovered as a naturally occurring mutation, exhibits a dwarf plant size, compact growth habit, dense crown, larger leaves, darker bronze exfoliating bark, and ease of propagation through tissue culture, distinguishing it from other amur cherry cultivars and providing a unique aesthetic and practical advantage in landscaping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional amur cherry cultivars are used, then they provide adequate growth and survival, but they lack compact growth habits and occupy excessive space in urban landscapes
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a mutant plant with altered growth parameters - specifically shorter internodes and reduced overall size - while maintaining the species' hardiness and adaptability. This creates a dwarf cultivar that fits urban spaces without sacrificing landscape adaptability
2Length of moving object
If amur cherry trees are allowed to grow to their natural size, then they provide full structural development, but they require excessive space and are unsuitable for limited urban environments
Solution Approach 1:
The invention changes the growth parameter of height by propagating a mutant with naturally shortened internodes. The resulting cultivar reaches only 3.6-4.6m in eight years compared to the species' 6-7.6m, providing full structural development in a compact form suitable for urban areas
3Ease of manufacture
If conventional amur cherry cultivars are planted, then they provide standard growth characteristics, but they lack unique aesthetic characteristics for enhanced landscape appeal
Solution Approach 1:
The patent applies local quality by highlighting and propagating specific localized characteristics of the mutant plant - darker bronze exfoliating bark, larger leaves, and denser crown - while maintaining ease of propagation through tissue culture. This creates a cultivar with unique aesthetic qualities that stand out in landscape applications
Data Source
AI summary
A new cultivar of Prunus maackii, ‘Jespur’, characterized by its dwarf plant height, its short leaf internodes resulting in a dense crown with an upright form, its large leaves, its dark bronze trunks with exfoliating bark, its ease of propagation by tissue culture, and its hardiness to U.S.D.A. Zone 2.