Plank's catchfly (Silene plankii)

Same genus

• Moss campion (Silene acaulis)
• Sleepy silene (Silene antirrhina)
• Naked catchfly (Silene aperta)
• Palmer's catchfly (Silene bernardina)
• Bridges' catchfly (Silene bridgesii)
• Sticky catchfly (Silene caroliniana)
• Yellowgreen catchfly (Silene chlorantha)
• Striped corn catchfly (Silene conica)

The whole genus Campion (Silene)