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  2. Leaf - Wikipedia

    en.wikipedia.org/wiki/Leaf

    180° (or 1 ⁄ 2): two leaves in one circle (alternate leaves) 120° (or 1 ⁄ 3): three leaves in one circle; 144° (or 2 ⁄ 5): five leaves in two gyres; 135° (or 3 ⁄ 8): eight leaves in three gyres. Most divergence angles are related to the sequence of Fibonacci numbers F n. This sequence begins 1, 1, 2, 3, 5, 8, 13; each term is the ...

  3. Cotyledon - Wikipedia

    en.wikipedia.org/wiki/Cotyledon

    The cotyledon of grasses and many other monocotyledons is a highly modified leaf composed of a scutellum and a coleoptile. The scutellum is a tissue within the seed that is specialized to absorb stored food from the adjacent endosperm. The coleoptile is a protective cap that covers the plumule (precursor to the stem and leaves of the plant).

  4. Binary tree - Wikipedia

    en.wikipedia.org/wiki/Binary_tree

    A binary tree is a rooted tree that is also an ordered tree (a.k.a. plane tree) in which every node has at most two children. A rooted tree naturally imparts a notion of levels (distance from the root); thus, for every node, a notion of children may be defined as the nodes connected to it a level below.

  5. Monocotyledon - Wikipedia

    en.wikipedia.org/wiki/Monocotyledon

    John Ray (1674), pp. 164, 166 Since this paper appeared a year before the publication of Malpighi's Anatome Plantarum (1675–1679), Ray has the priority. At the time, Ray did not fully realise the importance of his discovery but progressively developed this over successive publications. And since these were in Latin, "seed leaves" became folia seminalia and then cotyledon, following Malpighi ...

  6. Tree (data structure) - Wikipedia

    en.wikipedia.org/wiki/Tree_(data_structure)

    In computer science, a tree is a widely used abstract data type that represents a hierarchical tree structure with a set of connected nodes. Each node in the tree can be connected to many children (depending on the type of tree), but must be connected to exactly one parent, [ 1] except for the root node, which has no parent (i.e., the root node ...

  7. Lettuce - Wikipedia

    en.wikipedia.org/wiki/Lettuce

    There are several types or cultivars of lettuce. Three types – leaf, head and cos or romaine – are the most common. [30] There are seven main cultivar groups of lettuce, each including many varieties: Leaf—Also known as looseleaf, cutting or bunching lettuce, [35] this type has loosely bunched leaves and is the most widely planted. It is ...

  8. Glossary of leaf morphology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_leaf_morphology

    Being one of the more visible features, leaf shape is commonly used for plant identification. Similar terms are used for other plant parts, such as petals, tepals, and bracts. Oddly pinnate, pinnatifid leaves (Coriandrum sativum, coriander or cilantro) Partial chlorosis revealing palmate venation in simple leaves of Hibiscus mutabilis

  9. Binary search tree - Wikipedia

    en.wikipedia.org/wiki/Binary_search_tree

    O (n) Fig. 1: A binary search tree of size 9 and depth 3, with 8 at the root. In computer science, a binary search tree ( BST ), also called an ordered or sorted binary tree, is a rooted binary tree data structure with the key of each internal node being greater than all the keys in the respective node's left subtree and less than the ones in ...