Anthurium nigropunctatum Croat & J. Rodr.

Epiphytic or secondarily terrestrial in regrowth; stems to 60 cm long; internodes short, 2–3 cm diam.; cataphylls 14–30 cm long, green, promptly turning red-brown, persisting intact at upper nodes, eventually deciduous; petioles terete, sometimes obtusely sulcate, 25–115 cm long, 6–8 mm diam., flexible, sheathed 5–10 mm diam.; geniculum 2.5–5.5 cm long, pale green; blades narrowly ovate-cordate, 28–61 cm long, 24–42 cm wide, (1.2)1.4–1.7 times longer than wide, mostly 1.5 times longer than wide, broadest just above the base, semiglossy, slightly bicolorous, dark green above drying dark brown to grayish, slightly paler beneath, drying reddish brown to grayish, abruptly acuminate at apex, deeply cordate at base, the lobes rounded; both surfaces dark glandular punctate, lower surface with glands more conspicuous (at least on drying), concentrated principally in the vicinity of the major veins; sinus hippocrepiform to spatulate, 6–14 cm deep; midrib convex above, more prominent, acute and paler below, drying reddish brown; primary lateral veins 7–9 pairs, convex above, bluntly acute below, departing at 35–45 cm long, weakly curved to the collective vein; collective veins arising usually from the 1st pair of basal veins, sometimes the 2nd pair of basal veins, rarely from one of the primary lateral veins, loop-connected and often difficult to discern; tertiary veins obscure below; basal veins 5–7, all free to the base; inflorescence erect; peduncle 16–64 cm long, 5–10 mm diam., subterete, obtusely sulcate, about 3/4 as long at the petioles; spathe light green, lanceolate and boat-shaped, erect, erect-spreading, sometimes slightly hooding the end of the spadix, 11–28 cm long, 2–8 cm wide; subcoriaceous, acuminate at apex, inserted at 20 degrees angle and meeting at an acute angle at base; spadix creamy white, cylindrical, 8–17 cm long, 6–20 mm diam., stipitate 5–8 mm; flowers more or less quadrangular, 2.1–2.6 mm long, 2–2.2 mm wide (dried) 10–18 visible per spiral; tepals drying ca. 1 m wide, the inner margin rounded ca 1.4 mm wide; stamens held at the level of the tepals, anthers yellow drying 0.6 mm long, 0.6 mm wide, scarcely divaricate; infructescence erect, to 19 cm long; berries 3.5–8.5 mm long, claviforme, carmen-red, white at the base, drying narrowly acute; pericarp thick with raphides toward the base, mesocarp mucilaginous, yellowish; seeds 3–3.5 mm long, discoidal, green, 1 per locule.

Anthurium nigropunctatum is known only from the western slope of the Andes at 400 to 700 m elevation. It is common only along the road to the primary forest and in the regrowth areas but rare in the primary forest. It is a member of section Calomystrium Schott, the only member of this section at Reserva ENDESA. It is characterized by its persistent intact cataphylls, the punctate, cordate blades, the boat﷓shaped pale green erect spathe, creamy white cylindroid spadix and the early emergent red berries. The name refers to the dark glandular punctations which are not common in section Calomystrium. This species was treated as A. xanthostachyum Sodiro, an unrelated species that differs in having longer internodes (6--12 cm long), fibrous, persistent cataphylls, much veinier blades which are 2.5--3 times longer than wide and a greenish yellow spadix. Two collections from El Oro Province (Dodson 9017 and Schupp et al. 25) from west of Piñas differs in apparently lacking glandular punctations on the upper surface. These otherwise seem to match the other material of the species very well. Croat 50631 is perhaps also this species but it differs in having blades more narrowly ovate, over 2 times longer than wide and in having more conspicuous punctations on the upper surface.

Anthurium nigropunctatum is a species of plant in the family Araceae. It is endemic to Ecuador. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests. It is threatened by habitat loss.