Subject
- Specific Epithet: obtusifolium 1
- Specific Epithet: oederiana 1
- Specific Epithet: orbicularis 1
- Specific Epithet: orientale 1
- Specific Epithet: paludicola 1
- Specific Epithet: pinnata 1
- Specific Epithet: pleniceps 1
- Specific Epithet: polyantha 1
- Specific Epithet: polyanthos 1
- Specific Epithet: procurrens 1
- Specific Epithet: proligera 1
- Specific Epithet: pseudopunctatum 1
- Specific Epithet: pulchrum 1
- Specific Epithet: punctatus 1
- Specific Epithet: recurvata 1
- Specific Epithet: recurvirostre 1
- Specific Epithet: rigidulus 1
- Specific Epithet: riparia 1
- Specific Epithet: riparoides 1
- Specific Epithet: robustum 1