Grain, the caryopsis or fruit of Gramineae; any small seed.
- Grass, crab, [114]
- Grass family, weeds in, [110]
- Grass, old witch, [115]
- Grass, porcupine, [117]
- Grass, stink, [115]
- Green foxtail, [117]
- Great bindweed, [150]
- Great burdock, [162]
- Great ragweed, [161]
- Grindelia, [166]
- Gronovius' dodder, [151]
- Ground honeysuckle, [139]
- Gum plant, [166]
- Hare's ear, [135]
Has´tate, like the head of a halberd—applied to leaves which have a spreading lobe on each side of the base.
- Hawksbeard, [165]
- Heal-all, [155]
- Hedge bindweed, [150]
- Hedge mustard, [137]
- Helianthus, [167]
- Hibiscus, [146]
- Hieracium, [167]
- Hillman, F. H., graduate of the College in 1888; expert draftsman of the seed Division of Washington, D. C, [103]
- Hilum, [134]
Hi´lum, the scar or point of attachment of a seed.
- Hoarhound, [154]
- Hoary alyssum, [133]
- Hoary cress, [136]
- Honeysuckle, ground, [139]
- Hordeum, [115]
- Horse nettle, [155]
- Horse-weed, [165]
- Hound's tongue, [152]
- Hypericaceae, [147]
- Hypericum, [147]
- Illecebraceae, [128]
In-cum´bent, leaning or lying upon; applied to cotyledons when the caulicle is folded against the track of one of them, shown as [Symbol: || o].