Impatiens khasiana var. toppinii

Smets, E. F. & Janssens, S. B., 2018, Balsaminaceae of Myanmar, Blumea 63 (3), pp. 199-267 : 252-253

tall................................ b. var. toppinii a. var. khasiana — Map 20

Impatiens pritchardii Toppin (1920) 359; W.J. Kress et al. (2003) 170, syn. nov. — Type: Toppin 4093 (lecto,designated here K K000694828;isolecto K H2015/00092 149), Myanmar, Kachin State,Wasi, Kachin Hills,alt. 170 m, 12 Dec. 1911.

Herb more than 40 cm tall. Stem erect, stout, simple, 4–11 mm diam. Petiole (10–) 25–45 mm long, 1.5–2 mm diam. Lamina 70–140 by 37–50 mm, apex acute to acuminate, base cuneate to attenuate, margin serrate with small teeth, adaxial pilose, abaxial remotely pilose, with 2–4 pairs of glandular hairs on margin near lamina base and 1–3 pair(s) on petiole, up to 2 mm long; lateral veins 10 or 11 pairs. Inflorescence axillary to subterminal, (1- or) 2- or 3-flowered. Peduncle 10–20 mm long, densely pilose. Rachis 2–11 mm long. Flowers 28–34 mm long, 27–40 mm deep, pink. Bracts 4–7 by 1.5–3.5 mm, narrowly lanceolate to elliptic, apex acute, base cuneate, margin entire, without glands, pilose. Pedicel 14–17 mm long. Lateral sepals 8–12.5 by 5.5–7 mm, obliquely ovate, angular on one side, base cuneate, white with green tip. Lower sepal 16–23 mm long, 11–16 mm deep, glabrous or remotely pilose; spur 15–22 mm long. Dorsal petal 13–18 by 9–16 mm, broadly ovate to elliptic, apex acuminate to acute, abaxial midvein c. 2 mm wide. Lateral united petals 26–30 mm long: the upper petals 9–12 by 6–10 mm; the lower petals 18–20 by 8–10 mm, obliquely elliptic. Stamens: filaments 5–6 mm long. Ovary 6.5–7 mm long, c. 1.5 mm diam. Fruits c. 15 mm long, 3 mm diam.

Phenology — Flowering: May to September.

Distribution — Myanmar (Kachin State), India (Meghalaya State).

Ecology — Growing in damp shady areas, 150–200 m altitude.

Note — Impatiens khasiana var. khasiana differs from var. toppinii in a stout and erect stem, and a slightly recurved spur, while the latter has a slender and decumbent stem and strongly recurved spur. Impatiens khasiana var. khasiana grows at 150–200 m altitude, while I. khasiana var. toppinii grows at 1200–1800 m altitude. For I. pritchardii , we found two sheets of Toppin 4093. We select K000694828 as a lectotype because it is in better condition.