Botanical name: Nechamandra alternifolia Family: Hydrocharitaceae (Tape Grass family)
Synonyms: Lagarosiphon alternifolia, Nechamandra roxburghii
Indian Oxygen-Weed is a submerged water plant, but rooted in soil. Leaves 2-7 cm × 1-1.5 mm, midvein slightly distinct, tip pointed. Male inflorescence with 60-100 flowers; flower-cluster-stalk translucent; spathe translucent, about 5 × 4 mm; male flowers with slender flower-stalk about 0.6 mm; sepals transparent; filaments about 0.3 mm. Female spathe tubular, about 5 mm, stalkless; sepals 0.5-1 × 0.4-0.7 mm; ovary 5-10 mm, flattened, margin minutely toothed on each side; styles retuse at tip, densely papillate. Indian Oxygen-Weed is found in ponds, lakes, slow-moving rivers and channels in Bangladesh, India, Myanmar, Nepal, Sri Lanka, Vietnam. Flowering: September-October.
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The flower labeled Indian Oxygen-Weed is ...