Anthurium pendens Croat

Ortiz, Orlando Oriel, de Stapf, María Sánchez, Baldini, Riccardo Maria & Croat, Thomas Bernard, 2019, Synopsis of aroids (Alismatales, Araceae) from Cerro Pirre (Darién Province, Panama), Check List 15 (4), pp. 651-689 : 667-668

Anthurium pendens Croat

Material examined. Middle slopes on W side of Cerro Pirre; 07°57′N, 077°46′W; 550–760 m; 28 Jun. 1988; T. B. Croat 68887 ( MO). Parque Nacional Darién, Cerro Pirre, campamento cerca del segundo mirador; 07°59′43″ N, 077°42′39″ W; 708 m; 2 Dec. 2016; O. O. Ortiz 2701 ( PMA).

Identification. This species is characterized by having pendent leaves, elongated, narrowly oblanceolate blades, acute at the base, black glandular-punctate on both sur- faces and primary lateral veins emerging from the midvein at an angle of 10–20°. It is also distinguished by its erect, relatively short, and greenish-brown to pinkish spadix. Anthurium pendens can easily be confused with A. friedrichsthalii Schott , since both species have an epiphytic habit with pendulous leaves, linear blades and yellowish berries. Anthurium friedrichsthalii Schott differs mainly in having black glandular-punctate blades only on the lower surface.

Distribution and ecology. Colombia and Panama. The samplings and the few collections made of this species in the study area, indicate that it represents a rare species and so far it has only been recorded in the mid-elevation evergreen forests, between 600 and 800 m.

Anthurium pentaphyllum var. bombacifolium (Schott) Madison

Material examined. Parque Nacional Darién, Cerro Pirre, Rancho Frío, cascada arriba; 08°00′58″N, 077°43′24″W; 164 m; 14 Apr. 2016; O. O. Ortiz 2566 ( PMA).

Identification. This taxon is characterized by having elongated stems with long internodes, usually deciduous cataphylls (sometimes persistent as fibers in the upper nodes), pedati-compound leaves with basal lobes subauriculate, short peduncles, white, greenish or grayish spadices, and reddish berries. By the resemblance in the leaves can be confused with A. clavigerum Poepp. and A. kunthii Poepp. However , A. pentaphyllum var. bombaci- folium differs from both species in having basal lobes sub-auriculate and short white-grayish spadices.

Distribution and ecology. Belize, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua and Panama. On Cerro Pirre, Anthurium pentaphyllum var. bombaci- folium is common in semideciduous forests. It usually grows on the buttress roots of the host trees, often close to the forest floor (between 3 to 5 m). As elevation increases, this species becomes less occasional. After 800 m no individual of this species was observed.