SexualSystemKey: The Linnaean Garden Walk
An app that lets garden visitors identify plants using the 18th-century method of counting stamens.
A botanic-garden app that lets visitors identify plants the 1753 way — counting stamens to place a plant in one of the work's 24 sexual-system classes — then shows where modern science puts the same species, turning a garden visit into a lesson in how classification evolved.
Concept
The 1753 work is arranged secundum systema sexuale: 24 classes defined by the number, fusion, and position of stamens, subdivided into orders. SexualSystemKey is a garden-visitor app that makes that arrangement walkable. The visitor picks a plant in the garden, counts stamens and pistils with the app's macro-photo guidance, and descends through the 1753 classes and orders to the genus assigned in the original work — pulling the original Latin diagnosis and trivial name from the digitized treatments. The payoff screen contrasts the two placements: 1753 (class, order, genus) versus modern botany (family, APG IV), showing where the old grouping held and where it broke. The wedge is one thing: experiential education in how biological classification works and how it changed, using the garden's own living collection and the original 1753 text.
Why now
The new dataset [0] provides the machine-readable structure of the sexual system — classes, genera, and the original diagnoses — so the key can be driven directly by the digitized 1753 treatments rather than a modern paraphrase. Major Linnaean institutions such as the Linnean Society of London and Uppsala's Linnaean Garden present the sexual system in exhibits but have no working, text-grounded key; the digitization makes the 1753 arrangement itself usable as a visitor experience.
Written by GLM · 9 Oct 2026
AI assessment
A niche but highly focused educational tool that leverages a specific dataset to create a tangible, historical experience in botanical gardens.
- Evidence strength 5/5
- The idea directly utilizes the machine-readable Plazi dataset of the 1753 Species Plantarum, matching the product's core mechanism to the available data.
- Market pull 3/5
- While the target institutions are prestigious, the user base is limited to museum/garden visitors, and the budget for such a niche educational app may be small.
- Novelty & moat 4/5
- Unlike the other catalog ideas which are research or curation tools, this is a consumer-facing experiential product that transforms a dataset into a physical activity.
- Feasibility 5/5
- The logic is a simple decision tree based on a provided dataset, making the MVP highly achievable for a small team.
- Wedge clarity 5/5
- The wedge is extremely sharp: a specific 'walk' through a garden using a specific historical classification system.
- Simplicity / focus 5/5
- The product is a single, focused utility with one clear purpose, avoiding the 'platform' trap.
Scored by Gemma 4 · 9 Oct 2026. Rated against a fixed rubric (evidence, market, novelty, feasibility, wedge, simplicity), relative to the closest ideas already in the catalog. A prior estimate to compare ideas before real-world signal arrives.
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Who benefits
- Linnean Society of Londonorganization
The Society stewards the 1753 author's own collections and educates about his system; a working sexual-system key is a flagship outreach tool tied directly to its heritage.
- Uppsala University (Linnaean Garden)organization
The garden where the system was originally demonstrated could offer visitors a key that classifies the very plants its curator worked with, grounded in the 1753 text.
- Missouri Botanical Gardenorganization
Its large education program and living collection could turn a garden walk into a classification-history lesson using the app's 1753-versus-modern contrast.
- Botanic Gardens Conservation Internationalorganization
BGCI could distribute the tool to its global network of member gardens as a ready-made education package.
- Natural History Museum, Londonorganization
Its botany galleries and Linnaean-type holdings make the 1753-versus-modern contrast a natural exhibit tie-in.