Arisaema murrayi var. sonubeniae P.Tetali, Punekar & Lakshmin.

Perennial herbs. Corms warty, flesh-coloured, hemispherical, 2.8 - 3 cm tall and 3.5 - 4 cm diam. in monoecious plants, 1.4 - 1.9 cm tall and 1.5 - 2.5 cm diam. in dioecious male plants; roots arising from the upper side of the corm; pink buds present on the upper side of the corm. Cataphylls 3, outermost almost underground, deltoid, c. 1.8 cm long without any pigmentation, innermost longest, c. 15.5 cm long, oblong, rounded at the apex, mucronate slightly below tip on the outside, rose-tinged with small red dots, coriaceous, underground portion white. Leaves mostly solitary, rarely two in monoecious plants, petiole 12 - 40 cm long, longer in monoecious plants; 0.6 - 1.5 cm diam. at base, 0.5 - 1 cm at middle and 0.3 - 0.7 cm at tip, light green in mature plants, greyish-brown tinged when young; leaf blade subpedatisect, leaflets 5 - 9, sessile, 5.5 - 17 x 1.7 - 6.5 cm, elliptic to obovate, base cuneate, apex caudate in monoecious plants, mucronate in dioecious male plants, dark or pale green above, glossy below; midrib, veins and veinlets prominently raised below, lateral nerves 10 - 12, uniting to form an intramarginal nerve 3 - 6 mm from the margin; margins glandular, erose. Inflorescence solitary, usually with male spadix, rarely androgynous spadix, exclusively female spadix not seen; peduncle 15 - 30 cm long, 0.4 - 0.8 cm diam., pink, apex green tinged with very faint white or purple streaks. Spathe 6.5 - 11.6 cm long; tube 2.5 - 4.7 cm long, 1.3 - 2.3 cm diam., cylindrical or narrowly funnel-shaped, mouth with revolute margins, convolute part of tube prominently veined, green in lower half, with scarlet blotch of c. 0.5 cm long externally on anterior side where tube margins meet at base, faint purple or lavender in upper half; limb expanded, ovate, acuminate, 3.5 - 6.5 cm long, 2.5 - 3.5 cm diam., light purple or lavender, distinctly veined, margins revolute in basal half, dark purple at base inside, curved forward so as to be horizontal. Spadix stipitate, curved, 4 - 8.5 cm long, stipe 2 - 4 mm long, androgynous spadix longer than staminate spadix; androgynous spadix with staminate portion 0.6 - 1.5 cm long and 0.6 - 0.8 cm in diam., in male spadix 1.8 - 2.6 cm long and 0.4 - 0.6 cm diam., staminate flowers scattered; stamens loosely arranged, each consisting of 3 - 6 fused anthers borne on a short stipe, c. 1.5 x 1 mm; anther lobes oblong, bilobed c. 0.5 mm long, pale yellow, dehiscing by upper transverse slit; sterile flowers 3 - 4, subulate, c. 2 x 0.5 mm, purple, present only rarely above the staminate flowers in androgynous spadices, otherwise absent, pistillate portion 1.6 - 3 cm long, 1.2 - 1.3 cm diam.; ovaries cylindric or ovoid, densely arranged, each with 4 erect, basal, orthotropous ovules; style short, white, pale green at base, 0.4 - 0.7 mm long and c. 0.3 mm in diam.; stigma capitate, papillose, brownish or white; appendix stout, 1.8 - 4.5 cm long, purple in lower half, white in upper half, columnar, round, curved, basally swollen with furrows and tapering towards apex, white or faint purple at base. Berries 0.6 - 0.9 cm long and 1 - 1.2 cm across in the middle, obovoid-oblong, green when tender, becomes orange-scarlet after maturity. Seeds spherical, 0.2 - 0.3 mm long and 0.2 mm across, brown.