Bengali name: Ban kachu. A herb, 30–68 cm high, rhizome c. 1.5 cm in diameter, freely rooting at the nodes. Stolon c. 39 cm long, c. 0.5 cm in diameter. Leaf blade 10–25 × 8–23 cm, narrowly oblong-ovate, apiculate, base rounded with a shallow rounded sinus, sinus 0.2–1.0 cm long, slightly glaucous beneath, dark green above or dark green above with a deep violet interveinal zone and light green beneath, intramarginal veins several, petiole longer than the blade, 12–68 cm long, sheathing for almost half the length, green with purple, light and deep purple. Peduncle slender, 8–20 cm long, green with purple. Spathe erect, basal section 1.6–2.3 × 1.0–1.3 cm, green, blade narrowly lanceolate, very finely acuminate, orange-yellow, 6.0–14.5 cm long, more thick. Spadix shorter than spathe, female zone 1.2–2.0 × 0.5–0.6 cm with 4-6 rows of whitish sterile ovaries at the base, no narrowed zone of neuters above, male zone 1.5–2.1 × 0.4–0.6 cm, anthers oblong, slightly compressed with the flat top crenulate, dehiscing by apical pores, appendix 3.5–5.7 × 0.2–0.3 cm, acute, scalyrough, with several rows of sterile male flowers at the base, c. 1.1 cm long, c. 0.3 cm in diameter. Ovaries sub-globose, c. 1.1 mm in diameter, 1-locular, ovules many, hemiorthotropous on the parietal placentation, green, style short, stigma disciform. Fruit many-seeded, ovoid to ellipsoid. Bangladesh, Moulvibazar district, Madhabkundo reserve forest, 20.05. 2005, Hosne Ara HA 1709 (DACB). Specimens examined: Bandarban: Betchari forest area, 22.09.2004, Hosne Ara HA 1188 (DACB); Thanchi, 24.09.2004, Hosne Ara HA 1358 (DACB); Moulvibazar: Madhabkundo reserve forest, 20.05.2005, Hosne Ara HA 1709 (DACB); ibid 06.07.2005, Hosne Ara HA 1844 (DACB); ibid 03.12.2014, Hosne Ara HA 2867 (DACB); Dhaka: Bangladesh National Herbarium garden (Cultivated), 20.06.2015, Hosne Ara HA 2883 (DACB) [Originally collected from Madhabkundo forest under Moulvibazar district]. Etymology: The variety is named after green with purple, light and deep purple colour character of its petiole and peduncle. Bengali name: Ban kachu. Perennial herb, tuber c. 4.5–7.0 cm long and c. 1.8–4.0 cm in diameter, stolon small, white. Leaves thin, petiole c. 99.5 cm long, light green, sheathing for about 1/3 at the base; blade peltate, 45–52 × 32–36 cm, ovate-sagittate, acute, base cordate, light green above and beneath, primary lateral veins 5–6 pairs, venation pinnately reticulate, pale green, sinus c. 8.0 cm long. Inflorescence solitary or paired, peduncle 30–35 cm long, c. 0.7 cm in diameter, light green, shorter than the petiole. Spathe constricted, 19.5–25.0 cm long, tube light green, 2.3–3.5 cm long, c. 2.5 cm in diameter, upper part reflexed, golden yellow, 17.0–21.5 cm long, 5–6 cm in diameter at the middle. Spadix sessile, shorter than the spathe, 11.5–13.5 cm long, female zone cylindrical, 2.1–3.0 cm long, 0.8–1.0 cm in diameter, sterile portion 1.0–1.5 cm long, cream, c. 0.5 cm in diameter at the middle, male portion 4.7–5.5 cm long, 0.5–0.6 cm in diameter, light yellow, appendix 3.0–3.5 cm long, c. 0.4 cm in diameter at the middle, light yellow, tip of the appendix blunt. Male flower 6-8 androus. Ovaries numerous, narrow, green, 1.5–2.0 mm long, 2–3 mm in diameter, style very short, green, stigma c. 0.05 cm in diameter, yellow. Ovule numerous. Staminode cream colour, 0.2–0.3 cm long, c. 0.15 cm in diameter. Bangladesh, Rangamati district, Rangamati forest area, 27.09.2004, Hosne Ara HA 1435 (DACB). Perennial herb, tuber c. 5 cm long, c. 4 cm in diameter. Petiole 15–55 cm long, c. 0.8 cm in diameter, green. Leaf paired, blade usually deeply trilobed, anterior lobe ovate-lanceolate, to c. 18.0 cm long, c. 9.5 cm in diameter, posterior lobe c. 18 cm long, c. 8 cm in diameter, green. Inflorescence paired. Peduncle c. 4 cm long, c. 1 cm diameter, green. Spathe c. 17 cm long, tube and blade separated by a strong constriction; tube c. 3 cm long, outside green, inside light green; blade c. 14 cm long, c. 8 cm in diameter at the middle, outside dark green, inside light purple, tip of the spathe twisted up to 4 cm. Spadix shorter than spathe, c. 11 cm long; female zone c. 1 cm long, c. 1 cm in diameter, flowers congested; sterile zone between female and male zone 2.3-2.5 cm long, the lower 0.8–1.0 cm densely covered with staminodes, the remainder naked, cream colour, longitudinally grooved; male zone cylindrical, c. 1.6 cm long, c. 1.0 cm in diameter; base and top oblique, flowers congested; appendix very shortly stipitate, stipe c. 1 mm long, elongate conical, c. 6.5 cm long, c. 1.3 cm in diameter at the base, pale purple, top acute, base crenulate or multifurcate, producing a strong unpleasant smell at female anthesis. Ovaries cylindrical, c. 1 mm long, c. 1 mm in diameter, yellowish green, unilocular, with one basal ovule; stigma sessile, large, discoid, with a central depression, 0.8 mm in diameter, 0.2 mm long, densely shortly papillose, light yellowish cream. Staminode filiform, c. 1.5 cm long, c 0.3 mm in diameter, creamy white or light yellowish, curled. Bangladesh, Netrakona district, Farangpara, 18.06.2004, Hosne Ara HA 865 (DACB). Bengali name: Ban kachu.