Buxus Robbupt Plant Columnar Growth Winter Hardiness
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Solution Overview
Problem
Existing Buxus microphylla cultivars lack a distinct columnar growth habit and consistent deep green foliage throughout the winter, with 'Wintergreen' losing its green color and turning bronze during winter.
Innovation Solution
The new cultivar 'ROBBUXUPT' exhibits an upright columnar growth habit, tight dense branching, and deep green foliage, remaining evergreen through winter, propagated via tip cuttings and stable across generations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If existing Buxus microphylla cultivars like 'Wintergreen' are used, then they provide ornamental value, but they lose green color and turn bronze during winter
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a sport mutation with altered physiological parameters - specifically, the new cultivar maintains chlorophyll stability at low temperatures where other cultivars undergo pigment degradation. This natural genetic variation provides the desired winter green color retention without requiring artificial intervention.
2Shape
If existing Buxus microphylla cultivars are used, then they provide ornamental value, but they lack a distinct columnar growth habit
Solution Approach 1:
The patent applies local quality by emphasizing the distinctive columnar growth habit as a localized structural characteristic of the new cultivar. The upright, narrow form concentrates foliage and branching in a vertical orientation, creating a sculptural quality that distinguishes it from the more spreading habits of other boxwood cultivars while maintaining the species' overall adaptability.
3Device complexity
If existing Buxus microphylla cultivars are used, then they provide ornamental value, but they lack tight dense branching and leaf structure
Solution Approach 1:
The patent applies composite materials by combining multiple desirable traits in one cultivar: tight branching density, small leaf size, and columnar form create a composite structural quality that achieves formal garden aesthetics. The dense foliage structure provides a uniform, textured appearance that maintains its visual appeal with minimal pruning intervention.
Data Source
AI summary
A new cultivar of Buxus microphylla named ‘ROBBUXUPT’ that is characterized by upright columnar growth habit, dense branching and deep green foliage which remains evergreen in USDA Zone 5 winters. In combination, these characteristics distinguish ‘ROBBUXUPT’ from all other existing varieties of Buxus known to the inventor.