Bulgaria
| Country: | Bulgaria |
| Type: | Postage stamps |
| Series: | Protected water plants |
| Nominal: | 42 ст |
| Year: | 1988 |
| Size: | 33.5 x 45.5 mm |
| Perforation: | comb 12¼ |
| Mintage: | 461,440 |
Protected water plants
 Bithynian Squill (Scilla bithynica) 0.14$ |  Geum rhodopaeum 0.05$ |  Marsh marigold 0.1$ |  Nymphoides peltata 0.14$ |
 Cortusa matthioli 0.1$ |  Crab claw |