Guatteria darienensis Susana Arias & Maas

Maas, P. J. M., Westra, L. Y. T., Guerrero, S. Arias, Lobão, A. Q., Scharf, U., Zamora, N. A. & Erkens, R. H. J., 2015, Confronting a morphological nightmare: revision of the Neotropical genus Guatteria (Annonaceae), Blumea 60 (1), pp. 1-219 : 67-69

46. Guatteria darienensis Susana Arias & Maas — Map 8

Guatteria darienensis Susana Arias & Maas in Arias G. et al. (2014) 150,f. 1. — Type: Brand & Ascanio 439 (holo HUA; iso JAUM, MO), Colombia, Antioquia, Turbo, Carretera Tapón del Darién, sector Río León-Lomas Aisladas , km 36, 20 m, 27 Aug. 1983.

Guatteria sp. 2 Erkens (2007) 208.

Tree or rarely a shrub 3–16 m tall, 4–18 cm diam; young twigs rather densely to sparsely covered with appressed hairs, soon glabrous. Leaves: petiole 2–7 mm long, 1–3 mm diam; lamina narrowly elliptic to narrowly obovate, rarely elliptic, 8–21 by 2.5–8 cm (leaf index 2.5–3.6), chartaceous, not verruculose, dull to shiny, greyish, dark green or brown above, dull, pale brown or brown below, glabrous above, sparsely covered with appressed hairs to almost glabrous below, base acute to attenuate, rarely obtuse, apex acuminate (acumen 5–15 mm long), primary vein impressed above, secondary veins distinct, 10–14 on either side of primary vein, impressed to slightly raised above, smallest distance between loops and margin 3–5 mm, tertiary veins inconspicuous or conspicuous, slightly raised above, reticulate. Flowers in 1–2-flowered inflorescences in axils of leaves; pedicels 30–75 mm long, c. 1 mm diam, fruiting pedicels 1–1.5 mm diam, rather densely to sparsely covered with appressed and some erect hairs, articulated at 0.2–0.3 from the base, bracts 3–7, soon falling, only one uppermost bract seen, elliptic, c. 7 mm long; flower buds depressed ovoid; sepals basally connate or free, broadly ovate-triangular, 3–7 by 4–6 mm, reflexed, outer side densely covered with appressed hairs; petals green, maturing yellow in vivo, narrowly elliptic, 12– 26 by 5 –10 mm, outer side densely covered with appressed hairs; stamens 1.5–2 mm long, connective shield papillate. Monocarps 35–50, green or pinkish, maturing red to purple in vivo, brown in sicco, ellipsoid or obovoid, 7–10 by 4–5 mm, sparsely covered with appressed hairs, apex apiculate (apicu- lum c. 0.5 mm long), wall c. 0.1 mm thick, stipes 7–15(–20) by 0.5–1 mm. Seed ellipsoid, 6–9 by 3.5–4 mm, shiny, reddish brown, pitted, raphe not distinct from rest of seed.

Distribution — Panama, Colombia (Antioquia, Chocó, Córdoba).

Habitat & Ecology — In lowland or premontane forest, along rivers, creeks, on steep slopes and swampy soils. At elevations of 20–800(–1200) m. Flowering: throughout the year; fruiting: throughout the year.

Vernacular names — Colombia: Guanabanillo (Zuluaga R. 1226), Yaya blanca (D.A. Sánchez S. & Hoyos M. 536).

Uses — Colombia: Wood is used for building houses and the bark for lashing material and head straps (D.A. Sánchez S. & Hoyos M. 536). The decoction of any part of the plant is used against malaria (Fonnegra et al. 8877).

Notes — Guatteria darienensis is well recognizable by relativately long and slender pedicels (up to 75 mm long in fruit), relatively small monocarps with a very thin wall (c. 0.1 mm thick) and long and slender stipes.

Some Panamanian material collected in the province of Panama from [“?]Parque Nacional Altos Campana ( Espinosa et al.720, FLORPAN 2962, Galdames et al. 3081, 4136, Van der Werff et al. 6198, 6933), and one collection from the province of Vera- guas (McPherson 12812), is aberrant by relatively smaller and thicker leaves (8–12 by 2.5–4.5 cm) with an acute to obtuse base.As all flower, fruit and seed characters match the species concept of G. darienensis very well, we refrained from giving this material a status of its own.