Major items
| Organic | Scientific name | Common name | Part | Origin |
| Kaempferia galanga L | Galangal | tuber | SE Asia | |
| Kalanchoe pinnata (Lam) Pers | Air plant, Cathedral bells | leaf | C-America | |
| Kalmia latifolia L | Calico Bush | |||
| Kefersteinia expansa | Ecuador | |||
| Kefersteinia graminea | Ecuador | |||
| Kefersteinia lactea | Ecuador | |||
| Kefersteinia laminata | Ecuador | |||
| Kefersteinia lojae | Ecuador | |||
| Kefersteinia mystacina | Ecuador | |||
| Kefersteinia pellita | Ecuador | |||
| Kefersteinia pulchella | Ecuador | |||
| Kefersteinia sanguinolenta | Ecuador | |||
| Kefersteinia taggesellii | Ecuador | |||
| Kefersteinia tolimensis | Ecuador | |||
| Khaya senegalensis (Desr) A Juss | African Mahogany | stem bark | Africa | |
| Khaya senegalensis (Desr) A Juss | W-Africa | |||
| Kigelia africana (Lam) Benth | Sausage Tree | fruit | W-Africa | |
| Kochia scoparia (L) Schrad (syn Bassia scoparia) | Belvedere Scott | fruit | China | |
| Koellensteinia graminea | Ecuador | |||
| Kraenzlinella anfracta | Ecuador | |||
| Kraenzlinella gigantea type | Ecuador | |||
| Kraenzlinella lappago | Ecuador | |||
| Krameria lappacea (Dombey) Burdet & B BSimpson | Rhatany Root | root | S-America | |
| Krameria triandra Ruiz & Pav (syn Krameria lappacea Root | Rhatany (Dombey) | S-America |
