Anthurium longissimilobum Croat

Appressed-climbing epiphyte; stem less than 20 cm; internodes short, less than 1 cm, 1-2 cm diam., drying reddish brown; leaf scars ca. 1.2 X 1.3 cm, mostly obscured by persisting cataphylls; roots not seen; cataphylls bluntly 2-ribbed, coriaceous, (6.5-)8-23.5 cm, narrowly acute, drying pale reddish brown, persisting intact; petioles semi-erect, (16-)31-67.7 cm, (2-)5-8 mm diam., subterete, semi rigid, matte, faintly striate, otherwise smooth, drying pale reddish brown, sheathed to (1-)3-4 cm; geniculum 1.5-2 cm, drying more distinctly reddish brown than petiole; blades narrowly triangular-subhastate, subcoriaceous, narrowly acuminate at apex, broadest at base, (22-)57.5-73.5 X (6.3-)11.5-25.2 cm, 2.9 5x longer than wide, subhastate with slender posterior lobes spreading at 155°, adaxial surface drying light olive-green, abaxial surface reddish brown; anterior lobe (4.5-)6-7 cm midway; posterior lobes 6.2-14.9 X (2-)3.2-5.5 cm, 1.9-3.2X longer than broad, rounded at apex, margins straight and revolute; sinus bullet-shaped, 6.2-14.9 cm deep; midrib prominently raised near base adaxially and diminishing toward apex, drying light brown, convex, drying light reddish brown abaxially; basal veins numerous, none free to base, coalesced; posterior rib (2.5-)11-14.5 cm, naked 1-4 cm; primary lateral veins numerous per side, generally spreading at 800, usually sigmoid, arising at ca. 80, forming an S-shaped curve, then merging on the upward swing with the margin, weakly raised and about as prominent as interprimary veins adaxially; interprimary veins ± equaling primary lateral veins; tertiary veins visible and weakly raised abaxially; collective veins moderately weak, arising from near the outer base of posterior lobes, slightly more prominent than primary lateral veins, (1-)3-8 mm from margin. INFLORESCENCE with peduncle 65-76 cm, 4-6 mm diam., subterete, about as long as petiole, drying light reddish brown; spathe semi-erect at ca. 200, curved gradually backward, 30.5-37.8 x 1.1-2.2 cm, ca. 1/2 as long as peduncle, inserted on peduncle at ca. 100, conspicuously decurrent, subcoriaceous, bright yellow-green, forming a spiral, drying reddish brown, acuminate at apex, acumen spiraled and apiculate, narrowly acuminate and decurrent ca. 9.5-10.8 cm at base; spadix pendent, cylindrical but slightly tapered at apex, 43.5-54.8 cm, 6-8 mm diam. at apex, 6-10 mm diam. at base, ca. 78-87x longer than wide, stipitate 5-20 mm in back, drying dark reddish brown. Flowers ca. 3.2 x 3.3 mm, edges straight; 4 to 5 flowers visible on the principal spiral, 5 to 7 flowers visible on the alternate spiral; tepals drying dark brown, lateral tepals 1.5-1.9 mm, outer margins rounded to broadly rounded; pistils weakly exserted above tepals on drying, drying dark reddish brown; anthers ca. 0.4  x 0.8 mm; thecae broadly ovate to round when open. INFRUCTESCENCE erect; peduncle ca. 65 cm, ca. 6 mm diam.; spadix to 22 cm, ca. 1.5 cm diam.; tepals brown; berries dark violet-purple to yellow-green (sensu Schunke 7289).