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Perennial herb 3–90 cm high.. Stem branched from the base or occasionally simple, with many nodes.. Leaves linear to lanceolate or narrowly oblong, lower leaves sometimes obovate, 2.5–10 cm long, 0.2–1.5(–2.5) cm wide, margins minutely denticulate, obtuse, cuneate at base, 3 distinct nerves beneath, glabrous.. Inflorescences many-flowered axillary cymes, very congested, proliferating, up to 10(–16) flowers clustered at axils.. Flowers 5-merous, whitish, sessile.. Calyx with tube, 1–2.5 mm long; lobes asymmetrical, lanceolate to obovate, 0.6–2 mm long, 0.5–0.8 mm wide, obtuse to acute to acuminate, margin often hyaline, sometimes minutely denticulate.. Corolla tube 3–7.5 mm long; lobes ovate, 1–2.2 mm long, 0.4–0.8 mm wide, acute.. Filaments inserted on the corolla tube, ± 2.5 mm long, with two hood-like appendages at insertion point; anthers up to 1.2 mm long, apiculate.. Ovary obovoid, 2–4.8 mm long, 1–1.5 mm diameter; style 1.2–1.8 mm long, subulate; stigma ± capitate, ± 0.5 mm diameter.. Capsule obovoid, 3.5–7 mm long, 2–3 mm diameter.. Seeds ± 0.3–0.5 mm, surface reticulate-pitted.. Fig. 6 (p. 25).
Leaves sessile (sometimes narrowed into a petiole-like base), longer than the internodes; lamina (1)5–8 x 0.3–1 cm., linear to lanceolate or narrowly oblong, entire, obtuse and mucronate at the apex, somewhat narrowing towards the base, 3-nerved from the base, glabrous.
A herb. It keeps growing from year to year. It grows 50-100 cm tall. The leaves are narrow and oblong to sword shaped. The flowers do not have stalks and they are white. They are in clusters in the axils of leaves. The fruit is a small oval capsule.
Calyx tube 1–2 mm. long; lobes usually unequal, 0.7–1.5(2) x 0.4–0.7 mm., triangular to lanceolate, acute at the apex and narrowly scarious at the margin, or obovate to subcircular, obtuse and mucronate at the apex, with wide scarious margin.
Stamens inserted below the sinuses, just above the middle of the tube; filaments 1.5–2.3 mm. long, with a double hood at the insertion point; anthers 1 mm. long, erect, shortly apiculate.
Flowers white with green lines, drying yellowish, sessile or subsessile; bracts long, shorter than the calyx, lanceolate-acuminate, carinate.
Corolla tube 3.5–6 mm. long; lobes 1.5–2 x 0.7–1 mm., ovate and abruptly narrowing to an acute or mucronate apex.
Inflorescence in many flowered axillary clusters, numerous in the axils of each pair of leaves.
Ovary 5–6 x 1 mm., ovoid; style 2–2.5 mm. long, subulate; stigma subcapitate.
Erect perennial herb, 5–30 cm. tall, simple or branched at the base.
Stem cylindric, glabrous with a decurrent ridge below each leaf.
Seeds 0.4–0.5 mm. in diam., subglobose, reticulate faveolate.
Capsule 3–4.5 x 2–2.5 mm., obovoid.
