1. Such as can be breathed

Encyclopedia: Breathable

• marsh bellflower
• marsh buggy
• marsh clematis
• marsh cress
• marsh elder
• marsh felwort
• marsh fern
• marsh gas
• marsh gentian
• marsh hare
• marsh harrier
• marsh hawk
• marsh hen
• marsh horsetail
• marsh marigold
• marsh milkweed
• marsh orchid
• marsh pea
• marsh pink
• marsh plant
• marsh rosemary
• marsh St-John's wort
• marsh tea
• marsh trefoil
• marsh wren