Anthurium rubrifructum 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 : 669

Anthurium rubrifructum Croat ( Figs 4I, 5A)

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 68864 ( MO). Ibid.; 07°56′N, 077°45′W; 800–1050 m; 29 Jun. 1988; T. B. Croat 68942 ( MO). Cerro Pirre, ridge top near Rancho Plastico; 07°57′N, 077°42′W; 1200 m; 10–20 Jul. 1977; J. P. Folsom 4287 ( MO). Summit of Cerro Pirre, cloud forest; 07°55′21″N, 077°42′57″W; 1000–1400 m; 29 Dec. 1972; A. H. Gentry 6993 ( MO). Slopes of Cerro Pirre; 07°57′N, 077°42′W; 500–1000 m; 30 Dec. 1972; A. H. Gentry 7148 ( MO). Serranía Pirre, 1.5–2.5 mi. S on ridge from intersection with trail down to Rancho Frío, cloud forest; 07°57′N, 077°43′W, 90–1000 m; 11 Jul. 1977; R. L. Hartman 4481 ( MO, PMA). Parque Nacional Darién, Serranía de Pirre, Ran- cho Plástico; 07°59′13″N, 077°42′28″W; 1127 m; 30 Jul. 2016; O. O. Ortiz 2635 ( MO, PMA). Ibid.; 07°58′57″N, 077°42′30″W; 1128 m; 18 Jul. 2016; O. O. Ortiz 2732 ( PMA).

Identification. The species is recognized by its nomadic vine life form, D-shaped petioles, brownish blades

(when dry), more or less panduriform blades with the posterior lobes longer than wide (which are projected backward), greenish and reflexed spathes, and red ber- ries. Croat (1986), mentioned that the color of the spadix is unknown for this species. During the samplings, it was determined that the species have pale-pinkish spa- dices and flowers with white and exserted stamens. In the field, A. rubrifructum could only be confused with A. hartmanii Croat & O. Ortiz (for differences, see notes on this species) and A. panduriforme Schott. The latter differs in having yellowish glossy blades (when dry), 15–30 primary lateral veins, and yellow spadices.

Distribution and ecology. Endemic species of Panama that is restricted to the montane cloud forest of Cerro Pirre, which is located above 1100 m. It is very abundant, mainly in places with lots of shade and haze. Individuals usually grow as nomadic vine and climb trees up to 10 m without disconnecting from the ground.