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Paleoethnobotany. Flotation machine in use at Hallan Çemi, southeast Turkey, c. 1990. Note the two sieves catching charred seeds and charcoal, and the bags of archaeological sediment waiting for flotation. Paleoethnobotany (also spelled palaeoethnobotany), or archaeobotany, is the study of past human-plant interactions through the recovery and ...
Heteromeles arbutifolia (/ ˌ h ɛ t ɪ r oʊ ˈ m iː l iː z ɑːr ˌ b juː t ɪ ˈ f oʊ l i ə /; [5] more commonly / ˌ h ɛ t ə ˈ r ɒ m əl iː z / by Californian botanists), commonly known as toyon, is a common perennial shrub native to extreme southwest Oregon, [6] [7] California, and the Baja California Peninsula. [4] It is the ...
Decoupage or découpage ( / ˌdeɪkuːˈpɑːʒ /; [ 1] French: [dekupaʒ]) is the art of decorating an object by gluing colored paper cutouts onto it in combination with special paint effects, gold leaf, and other decorative elements. Commonly, an object like a small box or an item of furniture is covered by cutouts from magazines or from ...
Evolutionary history of plants. A late Silurian sporangium, artificially colored. Green: A spore tetrad. Blue: A spore bearing a trilete mark – the Y -shaped scar. The spores are about 30–35 μm across. The evolution of plants has resulted in a wide range of complexity, from the earliest algal mats of unicellular archaeplastids evolved ...
Most of these plants have true roots and leaves, and many were quite tall. The tree-like Archaeopteris, ancestral to the gymnosperms, and the giant cladoxylopsid trees had true wood. These are the oldest known trees of the world's first forests. Prototaxites was the fruiting body of an enormous fungus that stood more than 8 meters tall. By the ...
Penjing. Penjing, also known as penzai, is the ancient Chinese art of depicting artistically formed trees, other plants, and landscapes in miniature. Penjing generally fall into one of three categories: [ 1] Shumu penjing (樹木盆景): Tree penjing that focuses on the depiction of one or more trees and optionally other plants in a container ...
Plant morphology. Phytomorphology is the study of the physical form and external structure of plants. [ 1] This is usually considered distinct from plant anatomy, [ 1] which is the study of the internal structure of plants, especially at the microscopic level. [ 2] Plant morphology is useful in the visual identification of plants.
Plant tissue culture. Plant tissue culture is a collection of techniques used to maintain or grow plant cells, tissues, or organs under sterile conditions on a nutrient culture medium of known composition. It is widely used to produce clones of a plant in a method known as micropropagation. Different techniques in plant tissue culture may offer ...