Plants which produce characteristic pneumatophores and show vivipary belong to:
Halophytes
Psammophytes
Hydrophytes
Mesophytes
Correct answer: Halophytes
Solution
Halophytes are salt-tolerant plants, often found in mangroves and coastal marshes. Pneumatophores help them obtain oxygen in waterlogged soil, and vivipary helps seedlings establish in harsh saline conditions.