Impatiens khasiana Hook.f.

Smets, E. F. & Janssens, S. B., 2018, Balsaminaceae of Myanmar, Blumea 63 (3), pp. 199-267 : 252

59. Impatiens khasiana Hook.f.

Impatiens khasiana Hook.f. (1905) 27, 33; Vivek. et al. (1997) 111, 162; Odyou et al. (2015) 85. — Impatiens bella var. major Hook.f. (1875) 459. — Type: Hooker & Thomson s.n. (lecto, designated in Odyou et al. (2015) K K000694831; isolecto K K000694829, K K000694832), India, Meghalaya, Khasi Hills, 5000–6000 ft, 1850.

Annual herb, 20–50 cm tall. Stem erect to decumbent in the lower part, simple to branched in the decumbent part, pilose to densely pilose. Leaves spirally arranged. Petiole 10–45 mm long, pilose to densely pilose, with 1–3 pair(s) of glandular hairs. Lamina 40–140 by 21–50 mm, ovate to elliptic, apex acute to acuminate, base cuneate to attenuate, margin serrate to crenate with small teeth, adaxial pilose, abaxial remotely pilose, with 2–many pairs of glandular hairs on margin near lamina base and 1–3 pair(s) on petiole, up to 2 mm long; lateral veins 6–11 pairs. Inflorescence axillary to subterminal, erect, (1- or) 2- or 3-flowered raceme. Peduncle 10–35 mm long, densely pilose. Rachis 2–11 mm long. Flowers 20–35 mm long, 27–40 mm deep, pink. Bracts (3–)6–7 by 1–3.5 mm, narrowly ovate to lanceolate to narrowly lanceolate to elliptic, apex acute, base cuneate to obtuse, margin entire, without glands, pilose. Pedicel (9–) 15–17 mm long, pilose. Lateral sepals 2, 6–12 by 2–7 mm, free, obliquely ovate, angular on one side, apex acuminate, base cuneate, white with green tip, pilose. Lower sepal 10–23 mm long, 9–16 mm deep, bucciniform, apex acuminate and mucronate, with dark red reticulate lines, glabrous or remotely pilose, distal part gradually narrowed into an incurved spur, 15–22 mm long. Dorsal petal 13–18 by 9–16 mm, broadly ovate to elliptic, cucullate, apex acuminate to acute, base obtuse, pink, pilose, abaxial midvein with a crescent-shaped crest, c. 2 mm wide. Lateral united petals 26–30 mm long, free: the upper petals 9–12 by 6–10 mm, obovate, apex truncate, base cuneate, pink; the lower petals 18–20 by 8–10 mm, free, obliquely elliptic, apex acute to obtuse, with distinct auricles, glabrous. Stamens: filaments 5–6 mm long. Ovary 6.5–7 mm long, c. 1.5 mm diam, glabrous. Fruits c. 15 mm long, 3 mm diam, long fusiform, glabrous. Seeds unknown.