| Name | Structure/ Category | Description |
|---|---|---|
| Glomerule | [Inflorescences] {type} | A dense cluster of flowers. |
| Glossy | Lustrous or shiny, as the upper surface of southern magnolia (Magnolia grandiflora) leaves. | |
| Glume | one of the two empty bracts at the base of the spikelet in grasses | |
| Glutinous | Gluey, sticky or gummy; covered with sticky exudates. | |
| Grain | A grain is a seed with a hard coat. It typically refers to the seeds of grasses (Poaceae). Sometimes this term refers to a particle of pollen (e.g., a grain of pollen). | |
| Grass | Members of the Poaceae (Grass family) are true grasses. | |
| Grass-like herbaceous | [Plants] {habit} | Herbaceous with relatively long, narrow leaves appearing similar to those of grasses (Poaceae). |
| Grooved | [Apophyses] {texture} | With a narrow depression or groove. |
| Gymnosperm | [Plants] {major group} | A seed plant which produces seeds that are not enclosed inside an ovary, as the conifers. |
| Gynecandrous | This refers to a spikelet that has pistillate (female) flowers above the staminate (male) flowers. Some sedges (e.g., Carex spp.) have this arrangement of flowers on the same spikelet. |
