Anthurium karstenianum Engl.

Stem slender, climbing, internodes 5-6 cm long, 5-6 mm thick. LEAVES: Petiole slender, a little longer than the blade, 15-20 cm long, geniculum somewhat long, sulcate above. Blade thinly chartaceous, subsagittate or sagittate in adult plants, lower third contracted to the base, 'abhinc'? slightly narrowed towards the apex by a straight line, 15-29 cm long, at apex terminated suddenly into a 1.5-2 cm long narrow cusp, posterior lobes about 1/3 as long as the anterior lobe, semi-oblong or semi-elliptic, rounded, separated by a deep, narrow or sub-open sinus, 4-5 cm long, 3-4 cm wide, 4-5 primary lateral veins arising from the base on each side, 3 retrorse and joined into very short basal ribs; primary lateral veins of the midrib ca. 8, collective vein continuous with the interlobe veins, distant from the margin (one sixth of the width at the middle [of the blade]). INFLORESCENCE: Peduncle as along as or longer than petiole, slender, 20-25 cm long. Spathe linear-lanceolate, 6-7 cm long, 6-7 mm wide, cuspidate. Spadix with a 2-2.5 cm long stipe, 5-8 cm long, 3-4 mm thick.