Arisaema somalense M.G.Gilbert & Mayo

Perennial herb to about 60 cm tall. Tuber unknown. LEAF solitary, subtended by 2 oblong-lanceolate, pale-drying cataphylls. Petiole uniform green, basal sheaths forming short pseudostem, free apical part 12-19 cm long. Leaf blade radiately to pedately divided, circular to reniform in outline; leaflets (3-)5-7, broadly elliptic, 10-17-5 x 4-10-5 cm, central ones largest, acuminate, base cuneate, margins entire. INFLORESCENCE overtopping leaves, free part of peduncle 15-24 cm long. Spathe 10.5-14.5 cm long, 'green outside, white inside'; tube cylindric, usually constricted apically, 3-5-5 x 1-6-2-5 cm, green; limb ovate, narrowing at base, 7-9-5 cm long, 3-2-7-2 cm broad, white, 'frequently bent sharply backward'. Spadix 5-8 cm long, longer than spathe tube, androdioecious, the bisexual inflorescences with a usually short zone of staminate flowers above the pistillate ones; sterile appendix subcylindric to slightly conical, 1-4-2-7 x 0-4-0-7 cm, apex rounded, base narrowing gradually, pale; fertile part 3-6 x 0-6-1 cm. Flowers of both sexes congested to ± distant; staminate flowers usually composed of 2 stamens, anthers dehiscing by oblique apical slits; pistils flask-shaped, 2-5-3 mm long, stigma capitate. INFRUCTESCENCE: unknown.