Philodendron immixtum 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 : 679

Philodendron immixtum Croat

Material examined. Cerro Pirre, vicinity of station along Río Perisenico; 08°01′N, 077°44′W; 110 m; 26 Jul. 1994; T. B. Croat 77093 ( MO). Ibid., 17 km S of El Real, along trail from base camp, along Río Perisenico; 08°01′N, 077°44′W; 100 m; 28 Jul. 1994; T. B. Croat 77162 ( MO).

Identification. This species is characterized by its nomadic vine life form, long and slender internodes, slightly flattened petioles, greenish blades (when dry), narrowly ovate to ovate-elliptic, cordulate at base and solitary inflorescences with reddish spathe tubes inter- nally and white spathe blades on both surfaces. Individuals of this species can be confused with those of P. ligulatum var. heraclioanum Croat , which differs in having typically larger blades, shorter internodes, erectundulate petiole margins and blades purple spoted on the lower surface.

Distribution and ecology. Colombia and Panama. In the study area, P. immixtum has been reported in semideciduous lowland forests at 100 m of elevation. During the samplings, individuals of this species could not be observed.