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A sepal (/ ˈ s ɛ p əl, ˈ s iː p əl /) [1] [2] [3] is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom.
The head of the Iris flower data set can be stored as a TSV using the following plain text (note that the HTML rendering may convert tabs to spaces): . Sepal length Sepal width Petal length Petal width Species 5.1 3.5 1.4 0.2 I. setosa 4.9 3.0 1.4 0.2 I. setosa 4.7 3.2 1.3 0.2 I. setosa 4.6 3.1 1.5 0.2 I. setosa 5.0 3.6 1.4 0.2 I. setosa
The dorsal sepal is 10–12 mm (0.4–0.5 in) long, 4–5 mm (0.16–0.20 in) wide and with the petals, forms a hood over the column. The lateral sepals are a similar length to the dorsal sepal but narrower and spread apart from each other.
Scatterplot of the 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. [1]
The stem of a plant, especially a woody one; also used to mean a rootstock, or particularly a basal stem structure or storage organ from which new growth arises. Compare lignotuber. caudiciform Stem-like or caudex-like; sometimes used to mean "pachycaul", meaning "thick-stemmed". caudicle diminutive of caudex.
If all of the petals are essentially identical in size and shape, the flower is said to be regular [3] or actinomorphic (meaning "ray-formed"). Many flowers are symmetrical in only one plane (i.e., symmetry is bilateral) and are termed irregular or zygomorphic (meaning "yoke-" or "pair-formed").
The dorsal sepal is linear to lance-shaped, erect or curved forward, 15–30 mm (0.6–1 in) long and about 3 mm (0.1 in) wide. The lateral sepals are about the same length as the dorsal sepal but much wider, especially near the middle and are parallel to each other or sometimes crossed. The petals are about the same length as the lateral ...
The dorsal sepal and petals are joined to form a hood over the column with the dorsal sepal suddenly curving downwards near its tip which is often brown. The lateral sepals turn downwards and are 11–13 mm (0.4–0.5 in) long, 6–7 mm (0.2–0.3 in) wide and joined to each other for about half their length.