Ludwigia sphaerocarpa|round-pod water-primrose|Onagraceae

Ludwigia sphaerocarpa. By Bruce Sorrie. Copyright © 2016 New England Wild Flower Society.gobotany.newenglandwild.org

Ludwigia sphaerocarpa is a perennial herb to 1 m tall, colonial from stolons, freely branched above, often red in full sun.

Leaves alternate, stalk 0-0.2 cm long, blade 5-10 cm long, to 1.5 cm wide, lance-shaped to linear, pointed at both ends, leaves of inflorescence much smaller.

Flowers green, no petals, sepals 4 from rim of flower base (hypanthium), stamens 4 yellow, ovary inferior, surrounded by hypanthium, stigma round, yellow; blooms and fruits July-Sept.

Fruit a rounded capsule to 0.4 cm, surrounded by old calyx lobes.

Wetland status: OBL.

Frequency in NYC: Rare (NYS S2 T; CT E).

Origin: Native.

Habitat: Wet soil, swamps.

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Ludwigia sphaerocarpa round-pod water-primrose Onagraceae LUSP; R (DeCandido 2001);