Classification Hierarchy
Kingdom Plantae
Subkingdom Tracheophyta
Superdivision Spermatophyta
Division Magnoliophyta
Class Magnoliopsida
Subclass Rosidae
Order Myrtales
Family Onagraceae
Genus Ludwigia
Species Ludwigia peploides
floating primrose-willow

Date: July 7, 2012 Location: Sand Lake (map)

USDA Plant Profile Flora of N. America

Scientific Name: Ludwigia peploides

Common Name: floating primrose-willow

Origin: Native

Notes: Four species of Ludwigia have been reported in Iowa: L. alternifolia, L. palustris, L. peploides, and L. polycarpa. All four are found in wet invironments (see reference 2 below). L. peploides is not frequent in Iowa but can form dense mats and is sometimes considered invasive (see reference 10).

Additional references: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.

Field Marks for Identification:

Flowers: June; yellow; petals and sepals 5, stamen 10, fruit; a 5 sided elongate many seeded capsule which functions as a floral pedicel during flowering.

Leaves: alternate, oblong-elliptic, margin entire.

Glossaries of botanical terms: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14.

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