- Casimirella ampla, Humirianthera ampla;Mappia ampla;Leretia ampla;Humirianthera duckei
- Ctenitis sloanei, Pteridophyta;Dryopteris ampla
- Cybianthus amplus, Conomorpha utiarityi;Conomorpha macrophylla;Conomorpha ampla
- Heterocloeon amplum, Baetus amplus;Acentrella ampla
- Lepidolejeunea integristipula, Pycnolejeunea integristipula JBJack & Steph;Hygrolejeunea devexiloba;Pycnolejeunea ampla;Pycnolejeunea integristipula;Stictolejeunea orientalis;Symbiezidium integristipulum
- Nymphaea pulchella, Nymphaea ampla
- Pigritia laticapitella, Pigritia ampla;Pigritia angustipennella;Pigritia argyreella;Pigritia basilarella;Pigritia confusella;Pigritia dorsomaculella;Pigritia equitella;Pigritia fraternella;Pigritia mediofasciella;Pigritia obscurella;Pigritia occidentella;Pigritia ochreella;Pigritia ornatella;Pigritia purpurella;Pigritia tristella
- Poa secunda, Poa ampla;Sandberg bluegrass;Sandberg Bluegrass;Festuca oregona Vasey;Poa ampla Merr;Poa brachyglossa Piper;Poa buckleyana Nash;Poa canbyi (Scribn) Howell;Poa confusa Rydb;Poa englishii H St John & Hardin;Poa gracillima Vasey;Poa incurva Scribn & TA Williams;Poa juncifolia Scribn;Poa laevigata Scribn;Poa nevadensis Vasey ex Scribn;Poa orcuttiana Vasey;Poa sandbergii Vasey;Poa scabrella (Thurb) Benth ex Vasey
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