| DELPHINIUM | Flowering toxic plant with the common name larkspur (10) |
| DIASCIA | Genus of perennial plants with the common name of twinspur (7) |
| BRUNFELSIA | Shrub or small tree fern genus in the petunia family, with the common names of yesterday-today-and tomorrow (10) |
| MOCKORANGE | Common name of the plant with the variety Belle Etoile, Philadelphus (4,6) |
| STAVESACRE | Southern European larkspur; at crevasse (anagram) |
| LABURNUM | Yellow-flowering garden tree, with the common name of golden chain (8) |
| REDFIR | Evergreen taxonomically cross-referenced with the common name "Christmas tree" by the USDA |
| CARPENTARIA | Shrub genus, with the common name of the Californian tree anemone (11) |
| AGAVE | Succulent with the common name of century plant (5) |
| URSINIA | (with the common name 'jewel of the veldt'), grown for their yellow-, orange- or white-rayed flowers (7) |
| ERIOPHYLLUM | Genus of perennial plants from the daisy family, with the common name of Oregon sunshine (11) |
| HOSTA | Popular leafy perennial with the common name of plantain lily (5) |
| TETANUS | Infectious disease with the common name lockjaw |
| SCIRPUS | Genus of grass-like plants, related to sedge, with the common names club-rush, wood club-rush or bulrush (7) |
| CREEP | A plant with the species name of repens or reptans is so-named because it will ___ along the ground (5) |
| LUPIN | Colour of a plant with the species or variety name viridis (5) |
| IRISH | 'Nationality' of a plant with the species name hibernica (5) |
| NORTH | Origin of a plant with the species name borealis (5) |
| ALLIUM | Onion-like plant with the Latin name for 'garlic' (6) |
| GREY | Colour of a plant with the species name 'griseus' (4) |
