Wahlenbergia ceracea

Rhizomatous perennial; stems simple or occasionally 1- or 2-branched, erect or ascending, 15–80 cm high, glabrous or very sparsely hirsute near base, usually leafless in upper half; leaves alternate throughout, obovate near base, narrowly obovate to c. linear above, 10–40 mm long, 1–10 mm wide; margins entire, but usually with a few obscure calluses. Hypanthium obconical, 2.5–7 mm long, glabrous; calyx-lobes erect, narrow-triangular, 2.5–6 mm long, glabrous; corolla campanulate, pale blue to pale violet, often whitish outside, usually glossy, tube 3–7.5 mm long, equal to or longer than calyx-lobes, lobes elliptic to ovate, 10–23 mm long, 5.5–8.5 mm wide, acute, widely spreading; style 5.5–12 mm long, hardly constricted, lobes 3, oblong. Capsule obconical, 5–10 mm long, 3.5–5.5 mm wide. Flowers Jan.–Dec.