Acer palmatum Garnet Tower Upright Growth Habit
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Solution Overview
Problem
Existing cultivars of Acer palmatum var. dissectum exhibit a weeping growth habit and lack a distinct upright form with intense red foliage, limiting their landscape application and aesthetic appeal.
Innovation Solution
A new cultivar, 'Garnet Tower', with an upright growth habit, dissected purple foliage, and stem color that intensifies to purple with sun exposure, is developed through grafting onto Acer palmatum rootstock, offering a unique combination of traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional Acer palmatum var. dissectum cultivars are used, then the foliage coloration is red/purple, but the growth habit is weeping rather than upright
Solution Approach 1:
The patent applies inversion by selecting a branch sport that exhibits the opposite growth habit (upright instead of weeping) while maintaining the desired foliage characteristics. This natural mutation provided the reverse phenotype needed to resolve the contradiction between traditional weeping form and desired upright form for landscape versatility.
Solution Approach 2:
The patent changes the growth habit parameter from weeping to upright through selection of a branch sport mutation. This parameter change creates a new cultivar ('Garnet Tower') that maintains the red/purple foliage coloration while achieving the upright growth habit needed for diverse landscape applications.
2Shape
If Acer palmatum var. dissectum 'Lionheart' is used, then red foliage and upright habit are achieved, but the habit becomes weeping as the tree matures
Solution Approach 1:
The patent applies beforehand cushioning by selecting a branch sport ('Garnet Tower') that is pre-programmed with stable upright growth characteristics from the outset. This natural mutation provides inherent stability to the upright habit, cushioning against the eventual weeping transformation that affects other cultivars like 'Lionheart' as they mature.
Solution Approach 2:
The patent uses inversion by finding a branch sport that exhibits stable upright growth (the opposite of the typical weeping habit) throughout maturity. This natural mutation provides a reversal of the expected developmental trajectory, maintaining upright form rather than transitioning to weeping form.
3Adaptability or versatility
If Acer palmatum var. dissectum with weeping habit is used, then the species characteristics are maintained, but aesthetic appeal and landscape application are limited
Solution Approach 1:
The patent applies local quality by modifying only the growth habit characteristic (from weeping to upright) while preserving the essential species characteristics including dissected foliage, red/purple coloration, and overall Acer palmatum var. dissectum morphology. This localized change enhances landscape versatility without compromising species identity.
Solution Approach 2:
The patent changes the growth habit parameter from weeping to upright through branch sport selection, creating a cultivar that maintains all essential species characteristics (dissected leaves, red/purple foliage, deciduous nature) while achieving improved landscape adaptability through the modified upright form.
Data Source
AI summary
A new cultivar of Acer palmatum var. dissectum, ‘Garnet Tower’, characterized by its unique upright plant habit, it's deeply dissected and purple colored foliage, its purple stems, and its ability to be readily graphed on Acer palmatum rootstock.