(Mexican Primrose Willow)
Ludwigia octovalvis - (Jacquin) Raven
Onagraceae (Water-Primrose) Family
Plant is a perennial herb or woody sub-shrub. The stems are erect or creeping and usually branched. The stems are often reddish-brown in color. Its preferred habitat is calcareous soils, shallow water, marshes, bogs, swamps, floodplains, and ditches. Distribution is throughout the Escambia region.
The leaves are alternate (sometimes opposite) on the stem and usually several times longer than broad. The leaf stalks are very short or may be absent. The stipules, if present, are presented as tiny reddish glands at the stem/leaf base juncture.
The flowers are bisexual in nature and symmetrical in form. The color is yellow, often showy. Sepals and petals are attached at the top of the ovary. The sepals are usually persistent after the petals fall away. Floral parts are usually 4 or 5 each. Stamens number anywhere from 4 to 10. The flowers are produced in the upper leaf axil; occurring in the summer.
Fruit is a many-seeded, angled capsule.