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Leaves up to 25–55 mm. long, 10–35 mm. wide, ovate, acute or obtuse at the apex, abruptly narrowing below into a petiole–like base, serrate to doubly dentate or crenate, sparsely pubescent on both sides; venation prominent beneath.
Flowers in lax terminal and axillary racemes; pedicels 3–12 mm. long, glabrous or pubescent; upper bracts 1·5–3·5 mm. long, much shorter than pedicels; bracteoles minute, ± ovate, at the base of the pedicel.
Anther–tube 0·6–1 mm. long, ± pilose on the back of the upper thecae; the two lower anthers each with a tuft of hairs and a hyaline appendage at the apex; the upper anthers ± papillose at the apex.
Corolla 3·5–4·5 mm. long, blue, or white with blue markings, split practically to the base on the back, papillose inside on the bottom of the tube.
Calyx–lobes very narrowly triangular, ± erect, 2·2·5(3·5) mm. long, with a pair of teeth at the base, glabrous or ciliate.
Capsule narrowly obconical, 8–nerved, with 2 valves ± 0–8 mm. long, inferior part of capsule 5–7 mm. long.
Flowers blue or white with deep blue stripes or bright blue with 2 rows of dark dots across lower lip.
Filaments linear, at least the two lower pubescent below, attached to the corolla–tube at the base.
Stem sparsely to much branched, triangular with narrowly winged edges, sparsely pubescent.
Hypanthium narrowly obconical, 8–nerved, usually glabrous.
Seeds lenticular, 0·4–0·5 mm. long, finely striate, brown.
A glabrous erect branched herb, up to 8 in. high
Annual erect herb, 8–40 cm. tall.
Ovary subinferior.
