| Hunnemannia fumariifolia |
Mexican Tulip Poppy; Giant Yellow Tulip Poppy |
| Hura crepitans |
Sandbox Tree; Monkey's Dinner Bell; Possumwood |
| Hyacinthus orientalis |
Hyacinth; Common Hyacinth |
| Hyalella azteca |
Mexican Freshwater Shrimp; |
| Hydrangea macrophylla |
Hortensia; Hydrangea |
| Hydrophorus aestuum |
|
| Hydrotaea aenescens |
|
| Hymenaea courbaril |
West Indian Locust Tree |
| Hymenocallis caribaea |
Spider Lily |
| Hymenocallis littoralis |
Sea Daffodil; Spider Lily |
| Hymenorus obscurus |
|
| Hyophorbe lagenicaulis |
Bottle Palm |
| Hyophorbe verschaffeltii |
Spindle Palm |
| Hypargyria definitella |
|
| Hypera postica |
|
| Hyphaene coriacea |
Bala Palm |
| Hypoponera opaciceps |
|
| Hypoponera punctatissima |
|
| Hypothenemus squamosus |
|
| Iberis amara |
Annual Candytuft; Annual White Candy Tuft |
| Iberis carnosa carnosa |
Pink Candytuft; Violet Flowered Candytuft; Candy Tuft |
| Iberis umbellata |
Globe Candytuft; Annual Purple Candy Tuft |
| Icerya montserratensis |
|
| Icerya purchasi |
Cottony Cushion Scale |
| Idona minuenda |
|
| Ilex aquifolium |
English Holly; European Holly; English Holly |
| Ilex vomitoria |
Bermuda Holly; Yaupon |
| Impatiens balsamina |
Garden Balsam; Rose Balsam; Spotted Snapweed |
| Impatiens walleriana |
Busy Lizzy; Busy Lizzie; Impatiens; Red Balsam |
| Imperata brasiliensis |
Brazilian Satintail |
