Toothed Rungia is an erect herb. Leaves are
opposite, up to 5 x 2.5 cm, ovate-lanceshaped, sparsely hairy. Flower
spikes are short, dense, at branch tips, 1-sided; bracts markedly
biform; flowerless bracts in 2 regular series on one side the spike, 8
x 2.5 mm, green, striate, not or very narrowly margined. Flowering
bracts are 4 mm diameter, somewhat hairy; bracteoles 3 mm, obovate,
scarious-margined. Sepal cup is small, deeply 5-lobed; sepals
linear-lanceolate, velvet-hairy. Flowers are small, bluish or white,
limb 2-lipped, upper lip emarginated, shorter than the lower 3-lobed
lip. Stamens are 2; anthers 2-celled. Ovary is 4-ovulate, style
threadlike. Capsule is ovoid or oblong, shortly stalked, scarcely 1/6
inch, pubescent; seeds 4, compressed, orbicular, glabrous, verrucose,
sometimes minutely, sometimes very strongly, so that the seed is
concentrically rugose or subcristate. Flowering: March-May.