Harnieria hygrophiloides (F.Muell.) R.M.Barker
Barker, R.M. (1996) Jour. Adelaide Bot. Gard. 17: 149.
Usually flowers and fruits as a shrub about 1 m tall.
Inflorescence consists of flowers arising from sessile clusters of 2-4 obcordate bracts in each axil. Peduncles persistent on the older twigs. Calyx segments linear-lanceolate, about 8.5-10 mm long. Corolla 2-lipped (one lip 3-lobed and the other 2-lobed) white or cream with purple markings, tube about 7 mm long, hairy inside particularly towards the base. Two sack-like nectaries usually apparent on the inner surface. Stamens exserted, filaments about 6 mm long. Anthers with one tailed locule and one locule without a tail, locules quite separate, superposed. Connective clothed in bristles. Ovary ellipsoid, surrounded by a 2-lobed glandular disk, glabrous. Style hairy particularly in the lower half. Stigma slightly notched or 2-lobed at the apex.
Two large bilobed bracts present at the base of each cluster of fruits. Calyx green, persistent and extending from the base to about 3/4 the length of the capsule. Capsule smooth, ellipsoid, about 8-10.5 mm long. Seeds 2-4 per capsule, each seed about 2 x 1.7 mm, +/- disk-shaped, testa colliculate, yellow initially, dark brown later. Embryo bent in the middle so the radicle and cotyledons lie side by side.
Cotyledons orbicular to obovate, about 6-11 x 5-8 mm, apex emarginate. Hairs on the hypocotyl arranged in vertical rows. At the tenth leaf stage: leaf margins slightly crenate. Stems with grooves running from the base of each petiole to the next lower pair of leaves. Stem clothed in very short, pale, prostrate hairs. Seed germination time 59 to 91 days.