bristle-pointed iris
Iris setosa

It is thought that Iris setosa that grows in Canada is slightly different from the Asian form.

The data set consists of 50 samples from each of three species of Iris (Iris setosa, Iris virginica and Iris versicolor).

Therefore, the three species of Iris (Iris setosa, Iris virginica and Iris versicolor) are separable by the unsupervising procedures of nonlinear principal component analysis.

One of the clusters contains Iris setosa, while the other cluster contains both Iris virginica and Iris versicolor and is not separable without the species information Fisher used.