学科
- Specific Epithet: pallescens 1
- Specific Epithet: palustre 1
- Specific Epithet: pellucida 1
- Specific Epithet: pennata 1
- Specific Epithet: piliferum 1
- Specific Epithet: pinnata 1
- Specific Epithet: platyphylloidea 1
- Specific Epithet: polycarpa 1
- Specific Epithet: pulchellum 1
- Specific Epithet: purpureus 1
- Specific Epithet: pusillum 1
- Specific Epithet: recurvirostrum 1
- Specific Epithet: rhaptocarpa 1
- Specific Epithet: riparium 1
- Specific Epithet: rivulare 1
- Specific Epithet: roseum 1
- Specific Epithet: rostratus 1
- Specific Epithet: rothii 1
- Specific Epithet: rugelii 1
- Specific Epithet: rugifolia 1