Australian Tropical Rainforest Plants - Online edition
Ludwigia hyssopifolia (G.Don) Exell
Exell, A.W. (1957) Garcia de Orta 5 : 471.
Occasionally grows into a shrub 2-3 m tall but usually flowers and fruits as a herb.
Sepals lanceolate. Petals about 2-3 mm long. Stamens eight, four long alternating with the petals and four short opposite the petals. Ovules produced in pairs in the upper part of each locule while the lower ovules are produced singly but encased in corky tissue.
Cotyledons +/- orbicular or broadly ovate, about 2-6 x 2-6 mm, petioles about 4.5 mm long. First pair of leaves opposite or subopposite, obovate, petioles long and slender. At the tenth leaf stage: leaf blade elliptic, apex acute, base attenuate, petiole narrowly winged. Stem narrowly winged with pairs of wings running down the stem from each petiole. Stipules small and inconspicuous, about 0.25 mm long. Seed germination time 17 to 108 days.