Category: G
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Gymnosperm
Seed plants in which the ovules or seeds are not enclosed in an ovary (e.g. cycads, ginkgo, gnetums, yews and conifers). Refers to a group of vascular plants in which the seed is not protected by an ovary or fruit. Pines, firs, and cycads belong to this group. Major clade of seed plants in which…
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Gymnogrammoid
(In ferns) with the sori arranged along the veins of the lamina and without indusia.
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Guttation
Secretion of water from a plant, producing drops of water from glands at leaf margins or leaf tips.
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Gum
Hardened exudate from a wounded stem or leaves that is soluble in water. Substances that can disperse in water to form a viscous mucilaginous mass. They may be extracted from seeds, plant sap, and seaweeds, or they may be made from starch or cellulose. Most (apart from dextrins) are not digested and have no food…
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Gullet
Interior of a conical orchid flower, which the pollinator enters, as in most dendrobiums. The esophagus. The gullet, or oesophagus, is the tube down which food passes from the throat to the stomach.
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Grumous
With small clustered grains [unusual term].
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Growth ring
Annual or seasonal rings of growth that can be seen in wood.
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Growth form
Vegetative condition grouping similar habit types; examples are trees, shrubs and herbs.
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Growth
Changes in structure and function of cells, tissues, and organs. Cells grow in three ways: (a) increase in size, (b) increase in numbers, and (c) increase in intercellular material. A well-orchestrated series of processes that result in an increase in size of individual tissues, organs, and whole body. Increase in size of an organism or…
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Growing point
The apex of the growing stem; The place where cell division takes place.