Classification Hierarchy
Kingdom Plantae
Subkingdom Tracheophyta
Superdivision Spermatophyta
Division Magnoliophyta
Class Magnoliopsida
Subclass Rosidae
Order Myrtales
Family Onagraceae
Genus Ludwigia
Species Ludwigia alternifolia
Seedbox

Date: July 21, 2010 Location: Williams Prairie (map)

USDA Plant Profile Flora of N. America

Scientific Name: Ludwigia alternifolia

Common Name: seedbox

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).

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

Field Marks for Identification:

Flowers: July; yellow; petiolate, petals and sepals 4, stamen 4, fruit; a many seeded capsule, 4 sided nearly cuboidal with a rounded base and a pore at the distal end.

Stems and Leaves: stems erect, branched; leaves alternate, petioled,lanceolate (pointed at both ends), margin entire.

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

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