Perennial plants
A perennial plant or simply perennial is a plant that lives more than two years. The term is often used to differentiate a plant from shorter-lived annuals and biennials.
| Links | https://en.wikipedia.org/wiki/Perennial_plant |
About/Subject 5
 | Perennials | Hardback |
 | Piante perenni e alpine | Hardback |
 | The Explorer’s Garden (Rare and Unusual Perennials) | Hardback |
 | Perennials for Michigan | Paperback |
 | Le Perenni | Hardback |