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Glándula
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Estructura secretoria, como un nectario floral o extrafloral. Un cuerpo glandular ya sea que secrete o no; por ejemplo, el corpúsculo que conecta los dos polinios de las Apocynaceae subfamilia Asclepiadoideae |
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Glandular trichome
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Hairlike outgrowths of the epidermis with bulbous expansions at their apices that presumably secretes substance that maket difficult for insect predators to eat the plant. |
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Glandular trichomes
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Hairlike outgrowths of the epidermis with bulbous expansions at their apices. |
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Glaucous
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Covered with a whitish substance that can be rubbed off. |
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Globally symmetrical pollen
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In the Malpighiaceae, pollen with the pores not all in the same plane and the ectoapertures, if present, variously oriented. |
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Globose
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Referring to a spherical solid shape. |
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Glochid
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A very thin and usually deciduous, barbed spine characteristic of some Cactaceae (Opuntioideae). |
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Glochidiate
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Barbed; bearing glochids. |
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Glomerate
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Referring to a structure, such as an inflorescence, composed of very densely clustered units; e.g., flowers. |
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Glomerule
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A tightly congested cymose inflorescence or inflorescence derived from it, usually with sessile flowers; e.g., in the Asteraceae. |
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Glume
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A bract at the base of a spikelet in the Poaceae. |
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Grade
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A level of evolutionary organization and advancement. |
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Grain
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See caryopsis. |
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Granular
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Referring to a surface covered my minute, grain-like bodies. |
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Granulate (granulose)
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Appearing as if covered by very small grains; minutely or finely mealy. |
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Ground layer
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A hypothetical stratum of tropical rain forests consisting of herbs and other small plants that grow close to the ground.
Same as ground story. |
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Ground story
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Lowest layer of vegetation in a forest; composed of terrestrial herbs. Same as but less preferred than ground layer. |
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Ground tissue
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Plant tissue other than the vascular tissue, the epidermis, or the periderm. |
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Growth form
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The life form of a plant; e.g., herb, tree, or shrub. Same as habit. |
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Guard cells
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Two cells that flank each side of the stomatal opening. These cells control the input and output of carbon dioxide and oxygen and the output of water by opening and closing at different times of the day. |
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Guard cells
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Two cells that flank each side of the stomatal opening. These cells control the input and output of carbon dioxide and oxygen and the output of water by opening and closing at different times of the day. |
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Guayana
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A phytogeographic region corresponding to the Guayana Shield and including the Guianas and parts of northern Amazonian Brazil, Amazonian Colombia, and Amazonian Venezuela. Guayana should not to be confused with Guyana, the country, or the Guianas, a political term that encompasses Guyana, Suriname, and French Guiana. |
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Guayana Shield
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A geographic region in northern South America corresponding with Precambrian bedrock. |
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Gymnosperm
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A vascular plant with seeds not enclosed in an ovary (examples of gymnosperms are cycads, pines, firs, and spruce trees). The name of this group of plants means naked seeds. |
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Gynobasic style
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Referring to a style arising from the base of the ovary. Gynobasic styles are of two types: 1) the style is inserted laterally at the base of a syncarpous ovary as in Chrysobalanaceae and Rhabdodendraceae 2) the style arises from the center of an apocarpous ovary as in many species of Lamiaceae. |
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