Iris setosa, known as the beachhead iris, bristle-pointed iris, or a number of other common names, is a species of flowering plant in the genus Iris of the family Iridaceae. It belongs to the subgenus Limniris and the series Tripetalae. It is a rhizomatous perennial found in a wide range across and below the Arctic Circle, including in Alaska, Maine, Canada (including British Columbia, Newfoundland, Quebec and Yukon), Russia (including Siberia), China, Korea, and Japan. The plant has tall branching stems, mid green leaves and violet, purple-blue, violet-blue, blue, or lavender flowers, or, rarely, pink or white flowers.
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- ⭐ Core Definition: Iris setosa
- Iris setosa in the context of Iris flower data set
Iris setosa in the context of Iris flower data set
The Iris flower data set or Fisher's Iris data set is a multivariate data set used and made famous by the British statistician and biologist Ronald Fisher in his 1936 paper The use of multiple measurements in taxonomic problems as an example of linear discriminant analysis. It is sometimes called Anderson's Iris data set because Edgar Anderson collected the data to quantify the morphologic variation of Iris flowers of three related species. Two of the three species were collected in the Gaspé Peninsula "all from the same pasture, and picked on the same day and measured at the same time by the same person with the same apparatus".
The data set consists of 50 samples from each of three species of Iris (Iris setosa, Iris virginica and Iris versicolor). Four features were measured from each sample: the length and the width of the sepals and petals, in centimeters. Based on the combination of these four features, Fisher developed a linear discriminant model to distinguish each species. Fisher's paper was published in the Annals of Eugenics (today the Annals of Human Genetics).
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