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A herb. It is erect and grows 90 cm high. It is broad-leaved and keeps growing from year to year. The leaves are simple and alternate. They are broadly sword shaped. The flowers are in dense groups at the top of the plant. The flowers are small and 3-4 mm long. They are yellow. The fruit is an oval 3-sided nut. It is wrapped in the inner flower segments.
Perennial herb, up to 500 mm high. Stems erect. Leaves petiolate; blade narrowly obovate to elliptic, up to 180 x 30 mm, base cuneate, apex acute or obtuse. Ocrea entire. Flowers: only lower flower whorls or none subtended by a leaf; panicle ± condensed; callosity large, covering a large part of inner perianth segments; perianth green; Oct.-Mar.
Outer perianth segments greenish-brown, c. 2 mm long, oblong-lanceolate; inner perianth segments 3.5–4(4.5) × 2–3.5 mm, rhombic to triangular-lanceolate, acute or subacute to the apex, cuneate to rounded at the base, entire or subdenticulate on the margin, reticulate-veined, with a ± well developed dorsal tubercle near the base.
Leaves green or greenish-brown; lamina 12–18 × 2–3 cm, narrowly oblong-lanceolate, subacute at the apex, attenuate at the base, entire or wavy on the margin, glabrous or with scattered papillae beneath; petiole 3–5 cm long.
Flowers hermaphrodite, pedicellate, in many-flowered whorls arranged in congested terminal or axillary racemes, forming panicles; pedicels 2–3 mm long, unequal, articulated near or above the middle.
Perennial herb, up to 500 mm tall. Leaves narrowly to broadly lanceolate, narrowed to base. Flowers in a ± condensed panicle, only lower flower or none subtended by a leaf, green.
Perennial herb, up to 500 mm tall. Only lower flower whorls or none subtended by a leaf. Panicle condensed. Flowers green.
Stems hollow, glabrous, longitudinally striate, producing leafy axillary shoots which develop secondary inflorescences.
Nut pale brown, shiny, 1.8–2.5 × 0.5–1.5 mm, trigonous.
Erect perennial herbs up to 50 cm tall.
Ocrea 1–2.5 cm long, striate, entire.
Ovary 1–1.5 × 0.8–1 mm, trigonous.
Stamens 6; filaments filiform.
