Arum cylindraceum subsp. pitsyllianum Hadjik., Hand & G.Mans.

Tuberous herb, sprouting in late winter, February to March; tuber discoid, vertically, sometimes horizontally oriented, 2–4 3 1.5–3 cm. Petiole, including the sheath 15–30(38) cm 3 3–5 mm, canaliculate above, semicircular below, dark to light green, sometimes stained purple along the sheath margin and at the base of the petiole. Leaf blade constantly sagittate, apex acute to subacute, 6–15 3 4–10 cm, dark to light green; basal lobes overlapping at the lower, inner side in younger leaves. Inflorescence unscented; peduncle from above the tuber 13–30(39) cm 3 2–7 mm, usually shorter, but sometimes equal to or longer than the petioles, terete, deep to open green; spathe 9–16 cm; spathe tube 30–40 mm, 6 ovate, constricted above, externally pale to yellowish green, without purple stains at the base, but sometimes present along the margins, interior whitish to greenish white, with a pale purple horizontal strip just above the base, up to 1 cm wide or with a few traces of the strip visible; spathe limb ovate-lanceolate, up to 123 6 cm, erect or slightly cucullate, acuminate, pale to yellowish green externally, sometimes purple tinged along the margins, internally pale to yellowish green, with or without purple margins; spadix not more than 1/2 to 3/4 the length of the spathe, limp, 5.4–7.5 cm in total length, the floral groups lying close to each other or with a very short space in between; spadix appendix and stipe clavate, evenly tapering toward stipe, 30–403 1.5–5 mm, appendix up to ca. 10% wider than stipe, appendix orange to orangish purple, the stipe yellow, sometimes dirty yellowish purple. Staminodes usually in 3 whorls, forming a zone 3–5 mm wide, bristles filiform, slightly flexuous to semirigid, constantly pointing downward, rarely a few nearly horizontal, 5–6 mm long, creamy white all over, bases conic, verrucate, creamy. Staminate flowers forming a zone 4–6 mm wide, anthers and connectives orange. Pistillodes mostly in 2 to 3 whorls forming a zone of about 5 mm wide, bristles filiform, rigid to semirigid, mostly pointing upward, creamy white, bases bulbiform, creamy white. Pistillate flowers in a cylindrical cluster 10–12 mm long, ovaries spherical, greenish yellow, stigma brownish. Fruiting spike oblongcylindrical, 3–4 cm long, ca. 2.5 cm wide; berries somewhat angular to irregularly shaped, (6–)7.5–9(10)35–7(10) mm, red to reddish orange; seeds 1 per fruit, broadly elliptic to globose, pale brown, net-veined to pitted, 4–7 3 (3.5–)4–5.5 mm.