Meriania juanjil Rob.Fern., R.Goldenb.& Michelang., Willdenowia

12. Meriania juanjil Rob.Fern., R.Goldenb.& Michelang., Willdenowia View in CoL 52(1): 58 (2022).

Type:— PERU. Amazonas : Prov. Bongará, Montane rainforest along Yambrasbamba-Pomacocha trail between Yambrasbamba and Yanayacu, 2200–2300 m, 26 Jun 1962 (fl.), J. Wurdack 1054 ( holotype: USM! [accession no. 27403 ]; isotypes: F! [accession no. 1601214 ], NY! [barcode 02499960 ], P! [barcode 05225706 ], US! [barcode 02925052]) . ( Figure 31 View FIGURE 31 ).

Comments:— Meriania juanjil differs from the other Peruvian species of Meriania by the combination of elliptic leaf blades (10.8–12.7 × 2.7–3 cm) with moderate puberulent indumentum on the abaxial surface ( Fig. 31B–C View FIGURE 31 ), subcalyptrate calyx with small conic dorsal projections (ca. 0.5 mm long) ( Fig. 31D View FIGURE 31 ) and irregular dehiscence ( Fig. 31G View FIGURE 31 ), campanulate, pink-orange corollas, isomorphic stamens and stamen connectives prolonged below the thecae. Among Peruvian species, M. juanjil most closely resembles M. acida but differs by the width of leaf blades ( 2.7–3 cm vs. 5–8 cm), calyx shape (subcalyptrate vs. calyptrate), and dorsal projections on the calyces (small conic, ca. 0.5 mm long vs. absent). A detailed comparison of M. juanjil with other related species can be found in Fernandez-Hilario et al. (2022).

Distribution and phenology:— Known only from the type specimen, Meriania juanjil is endemic to northern Peru (Department of Amazonas) and grows in montane forests at 2200–2300 m ( Fig. 9 View FIGURE 9 ). It has been collected in flower in June.