• xystopteris fragilis,
• vystopteris fragilis,
• fystopteris fragilis,
• dystopteris fragilis,
• ctstopteris fragilis,
• cgstopteris fragilis,
• chstopteris fragilis,
• custopteris fragilis,
• c7stopteris fragilis,
• c6stopteris fragilis,
• cyatopteris fragilis,
• cyztopteris fragilis,
• cyxtopteris fragilis,
• cydtopteris fragilis,
• cyetopteris fragilis,
• cywtopteris fragilis,
• cysropteris fragilis,
• cysfopteris fragilis,
• cysgopteris fragilis,
• cysyopteris fragilis

The adjective form of "Cystopteris fragilis" is "fragile".

The plural form of "Cystopteris Fragilis" is "Cystopteris Fragilis." In scientific nomenclature, the species name remains unchanged in both singular and plural forms.

The singular form of the word "Cystopteris Fragilis" is "Cystopteris Fragilis". This is because "Cystopteris Fragilis" is already a singular botanical name, referring to a specific species of delicate fern.