Subject
- Specific Epithet: orbicularis 1
- Specific Epithet: palustre 1
- Specific Epithet: papillosa 1
- Specific Epithet: parvulus 1
- Specific Epithet: pellucidum 1
- Specific Epithet: pilifer 1
- Specific Epithet: pilifera 1
- Specific Epithet: polyantha 1
- Specific Epithet: polyanthos 1
- Specific Epithet: polycarpa 1
- Specific Epithet: prostratum 1
- Specific Epithet: pumila 1
- Specific Epithet: pumilum 1
- Specific Epithet: punctatus 1
- Specific Epithet: purpureus 1
- Specific Epithet: quadrata 1
- Specific Epithet: radicale 1
- Specific Epithet: ravenelii 1
- Specific Epithet: recurvirostrum 1
- Specific Epithet: recurvum 1