Westervelt White Spruce Cultivar Blue Soft Foliage
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Solution Overview
Problem
There is a need for a distinct cultivar of Picea glauca that exhibits unique characteristics such as blue needle foliage, soft texture, and an upright narrow plant habit, which are not found in existing cultivars like 'Blue Wonder' and 'Cupressina', and can be reliably propagated through grafting.
Innovation Solution
The 'Westervelt' cultivar of black hills spruce, discovered as a chance seedling, is characterized by blue, soft needle foliage and an upright narrow habit, distinguished from other Picea glauca plants, and is propagated through grafting, ensuring stable reproduction of these traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional Picea glauca cultivars are used, then green foliage and typical texture are obtained, but blue color and soft texture are not achieved
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a seedling with unique foliar parameters (blue color, soft texture) that differ from the typical green foliage of Picea glauca. Through asexual propagation by grafting, these parameter changes are stabilized and reproduced true to type, creating a distinct cultivar with novel visual and textural characteristics.
2Shape
If a narrow upright habit is selected, then landscape suitability is improved, but the plant may lack genetic stability
Solution Approach 1:
The patent uses asexual propagation by grafting as an intermediary method to transfer the desired narrow upright habit and other characteristics from the selected seedling to new plants. This propagation method ensures genetic stability and true-to-type reproduction, eliminating the uncertainty associated with seed propagation while maintaining the distinctive plant habit.
3Shape
If a new cultivar is developed with unique traits, then aesthetic value is improved, but propagation reliability may be compromised
Solution Approach 1:
Grafting serves as a reliable intermediary propagation method that ensures the new cultivar's unique aesthetic traits (blue soft foliage, narrow habit) are consistently reproduced. This vegetative propagation method maintains genetic fidelity and produces true-to-type plants, establishing reliable propagation for the new cultivar.
4Adaptability or versatility
If distinctiveness from existing cultivars is achieved, then market differentiation is improved, but the cultivar may not be suitable for widespread propagation
Solution Approach 1:
The patent employs grafting as a practical intermediary method for propagating the distinct cultivar. This approach balances the need for maintaining unique characteristics with the practical requirements of propagation, allowing the cultivar to be reproduced reliably while preserving its distinctive blue soft foliage and narrow upright habit that differentiate it from existing cultivars like 'Blue Wonder' and 'Cupressina'.
Data Source
AI summary
A new cultivar of white spruce tree named ‘Westervelt’ characterized by its needle foliage that is blue in color and soft in texture, needles and foliage that is narrow in diameter and size and upright and narrow plant habit with a strong central leader.