Veronica subtilis

Rhizomatous perennial; rhizomes to c. 25 cm long; flowering stems very slender or almost filiform, (4–)10–25(–35) mm long, hairs more or less inconspicuous, in lateral bands, c. 0.1 mm, papillose, recurved, rarely absent. Leaves sessile, mostly linear, (7–)11–25(–30) mm long, (0.5–)0.8–2(–2.5) mm wide, apex acuminate and apiculate, base attenuate, margins entire and somewhat revolute and thickened. Racemes lateral, (6–)15–55(–80) mm long with (1–)2–4(–6) flowers; peduncle (3–)10–35(–40) mm long; bracts to 6 mm long; pedicels usually 5–20 mm long. Calyx-lobes (3.5–)4–5 mm long, 0.6–1 mm wide in fruit, margins with very short papillose hairs; corolla 3.5–5(–8) mm long, mauve or pale blue. Capsule oblong, 2–3.5 mm long, 4–5 mm wide, emarginated, glabrous, slightly glossy; style 4–5 mm long. Flowers spring and summer.