Description

Key Characters:

Growth Form: Herbs to 50 cm tall, annual, much branched.

Stems: Stems 4-angled, glabrous.

Roots:

Leaves: Leaves simple. Opposite. Blades ovate-lanceolate, lanceolate, or narrowly elliptic, 1.5-7 × 1-2.5 cm. Apex acute to shortly acuminate. Base attenuate and decurrent onto petiole. Surfaces glabrous, abaxially pale green, adaxially green. Margins entire. Secondary veins 3-5 on each side of midvein. Petioles 0.3-1 cm. Stipules absent.

Flowers: Inflorescences terminal, leafy panicles of secund racemes; rachis glabrous to sparsely pubescent; bracts triangular to subulate, 1-1.5 mm; bracteoles linear to subulate, 1-1.5 mm. Flowers perfect, pedicel 2-9 mm, sparsely pubescent with gland-tipped and non-glandular trichomes (gland-tipped pubescent). Calyx deeply 5-lobed, 2.5-3 mm, outside glabrous or gland-tipped pubescent, lobes subulate. Corolla white, 0.9-1.5 cm, outside gland-tipped pubescent; tube basally funnelform for 4-8 mm; lower lip with purple dots, 3-lobed, 5-7 mm, erect, lobes ca. 3 mm; upper lip 5-7 mm, reflexed, 2-lobed, lobes ca. 1 mm. Stamens exserted from corolla tube. Ovary superior; style 6-10 mm, sparsely pilose toward base.

Fruit: Capsules ellipsoid-compressed; 1.5-2 × 0.3-0.4 cm; glabrous or sparsely pubescent with gland-tipped trichomes; ca. 12-seeded. Seeds ca. 2 × 1.5 mm; rugose.

Ploidy: 2n = 50.

Habitat:

Elevation Range: