Hortsense Glossary
| Term | Definition |
| regenerate | to reform; to regrow. |
| rhizomes | an underground stem distinguishable from a root by presence of nodes, buds or scale-like leaves. |
| rhizomorphs | a compact bundle of hyphae that has an outer covering and serves as a survival structure. |
| rosette | a crown of leaves radiating from a stem and at or close to the surface of the ground. |
| rosetting | short, bunchy habit of plant growth. |
| row covers | fine netting placed over plants to prevent insects from getting at them (e.g. Agrinet, Remay, etc.). |
| russet | brownish roughened areas on skin of fruit as a result of cork formation. |
| russetting | brownish roughened areas on skin of fruit as a result of cork formation. |
| rust | a disease giving a "rusty" appearance to a plant and caused by one of the rust fungi. |
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