A stout, erect herb. It keeps growing from year to year. It grows 35 m tall. It grows from a thickened rootstock. The stems are simple and unbranched. They are airy towards the top. The leaves are simple and opposite. They are oblong or sword shaped and thick and hairy on the upper surface. The edges can be slightly wavy. The flowers are in groups or 3-7 on side stalks. The flowers are 10-15 mm long and bell shaped and yellowish-green. The fruit is a follicle with a few lumps.
Perennial herb, 80-300 mm high. Leaves with blade narrowly ovate or oblong, flat or margins very slightly undulate. Flowers: style apex exserted beyond anther appendages; corona white; corolla dull purple-brown or violaceous outside, dull green within; Oct.-Jan. Fruit a follicle.
Herb, 80-300 mm tall. Leaves lanceolate or oblong, flat or very slightly undulate. Style apex exserted beyond anther appendages. Flowers dull purple-brown or violaceous outside, dull green within, corona white.