| ELKWEED | Flowering perennial plant of the Gentian family native to the western US |
| CHAMISO | An evergreen shrub with yellow-green flowers native to the western U.S. (7) |
| CENTAURY | A plant of the gentian family, typically having pink flowers (8) |
| WILDWEST | Name given to the western USA in its 19th-century frontier period (4,4) |
| MUGWORT | Herbaceous perennial plant of the daisy family native to north temperate regions (7) |
| FITCHIA | Genus of flowering plants in the sunflower family native to certain Pacific islands (7) |
| EUSTOMA | Related to the gentian, this small genus of annual plants is commonly known as lisianthus (7) |
| ANTBIRD | One of a large passerine family, native to Central and South America (3-4) |
| ARECIBO | Puerto Rican home to the Western Hemisphere's largest radio telescope |
| ASTILBE | Rhizomatous flowering perennial genus, often seen growing near to water; some are known as goat's beard or false spirea (7) |
| LIRIOPE | Autumn-flowering perennial such as muscari, often called 'lily turf' (7) |
| DIERAMA | Genus of flowering perennials, with common names including wandflower and angel's fishing rod (7) |
| SOTOL | Yuccalike desert plants of the agave family native to the USA and new Mexico |
| QUINOA | Plant in the amaranth family, native to the Andes and widely cultivated (6) |
| DRAGONTREE | Slow-growing palm-like tree of the agave family, native to the Canary Islands |
| CAPSICUM | Genus of plants from the nightshade family native to the Americas, whose fruits are commonly called chilli pepper, red or green pepper, or sweet pepper in Britain |
| HYSSOP | Shrub in the mint family, native to the Middle East (6) |
| BAYLOBELIA | Bright blue-flowering member of the bellflower family, native to Florida (3,7) |
| ALOE | Plant of the lily family native to South Africa |
| HELENIUM | Genus of plants of the daisy family native to America whose species includes yellowdicks (8) |
