Epilobium nummulariifolium

Detailed description

Loosely matted, creeping perennial herb forming patches up to 1 m diameter; stems pale purplish, with strigulose hairs running down the lines decurrent from the margins of the petioles. Flowers arising individually from the leaf axils, the stems continuing to grow and root beyond the point where flowers are produced. Leaves opposite, membranous, yellowish-green, usually with red margins and 1-3(-4) inconspicuous lateral veins on either side of the midrib; lamina 3.0-13.0 × 3-11.0 mm, broadly ovate to oblate, obtuse or rounded at apex, rounded to truncate at base, margins remotely and shallowly serrulate with 2-11 teeth on either side; petiole distinct, 1-7 mm long. Flowers nodding, falling before full pedicel elongation is achieved. Ovaries densely grey-strigulose, 6-15-20 mm long, on a strigulose pedicel 7-35 mm long. Floral tube 0.4-1.1 mm deep, 0.6-11 mm diameter, sparsely strigulose without. Sepals not keeled, sparsely strigulose, 1.7-2.1 × 0.4-0.9 mm. Petals white, 1.9-3.4 × 1.7-2.1 mm, notch 0.6-0.8 mm deep. Anthers yellow, 0.5-0.6 × 0.3-0.4 mm, filaments of longer stamens 0.9-1.3 mm long, those of shorter 0.4-1.0 mm, both shedding pollen directly onto stigma at or before anthesis. Style white 1.0-1.5 mm long; stigma white, clavate, 1.0-1.8 × 0.5-0.7 mm, surrounded by anthers at anthesis. Capsule densely grey-strigulose, (10-)15-40 mm long, borne on a strigulose pedicel 23-130 mm long. Seeds brown, 0.7-1.0 × 0.2-0.4 mm, obovoid. minutely papillose; coma 4.0-5.5. mm long, readily detaching or persistent.