Date: July 7, 2012 Location: Sand Lake (map)
| Classification Hierarchy | |
| Kingdom | Plantae |
| Subkingdom | Tracheophyta |
| Superdivision | Spermatophyta |
| Division | Magnoliophyta |
| Class | Magnoliopsida |
| Subclass | Rosidae |
| Order | Myrtales |
| Family | Onagraceae |
| Genus | Ludwigia |
| Species | Ludwigia peploides |
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.
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.
