Guatteria pachycarpa Erkens & N.Zamora, 2015

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 : 125

113. Guatteria pachycarpa Erkens & N.Zamora , sp. nov. — Fig. 54b , 55 ; Map 19

Monocarpiis pariete crassimisa, breviter stipitatis, praeterea foliis petiolis longissimis basi longe attenuatis ab omnibus speciebus Guatteriae distincta. — Typus: G. Herrera C. 5227 (holo INB; iso MO, U), Costa Rica, Limón, Cantón de Talamanca, Bratsi , Amubri , Alto Lari , Kivut , 1300 m, 8 March 1992 (fl, fr) .

Guatteria sp. 1 Erkens (2007) 208.

Tree 15–16 m tall, c. 35 cm diam; young twigs densely covered with appressed hairs, soon glabrous. Leaves: petiole 10–18 mm long, 1–2 mm diam; lamina narrowly elliptic to narrowly obovate, 5–14 by 3–5.5 cm (leaf index 2.3–2.6), chartaceous, not verruculose, dull, dark brown above, brown below, glabrous above, sparsely covered with appressed hairs, soon glabrous below, base long-attenuate, basal margins slightly revolute, apex acuminate (acumen 5–10 mm long) to acute, primary vein slightly raised above, secondary veins distinct, 10–17 on either side of primary vein, raised above, smallest distance between loops and margin 2–3 mm, tertiary veins raised above, reticu- late. Flowers solitary in axils of leaves; pedicels c. 10 mm long, c. 1 mm diam, fruiting pedicels 15–20 mm long, c. 3 mm diam, sparsely covered with appressed hairs, articulated at c. 0.3 from the base, bracts 5–7, soon falling, not seen; flower buds depressed ovoid; sepals free, depressed ovate, 3–4 by 4–5 mm, reflexed, outer side rather densely covered with appressed hairs; petals green to cream in vivo, ovate, 7–10 by 4–7 mm, outer side densely covered with appressed hairs; stamens c. 1 mm long, connective shield papillate. Monocarps 10–15, green, maturing purplish red in vivo, black in sicco, globose, 20–25 mm diam, glabrous, apex rounded, wall 5 – 6 mm thick, stipes 1.5–2 by 2.5–3 mm. Seed narrowly ellipsoid, 9 –10 by 3–5 mm, dark brown, rugose, raphe not seen.

Distribution — Costa Rica (Limón).

Habitat & Ecology — In non-inundated, wet forest (‘bosque muy húmedo’).At elevations of 1300–1500 m. Flowering:March; fruiting: March.

Vernacular names — Not recorded.

Other specimens examined. COSTA RICA, Limón, Cantón de Talamanca, Bratsi, Alto Lari , Kivut , 1300–1500 m, 15 Mar. 1992 (fl), Aguilar & Schmidt 1121 ( INB, MO) .

Note — Guatteria pachycarpa is very aberrant from any other species of Guatteria by its very thick monocarp wall (up to 6 mm thick) and also by its very short and thick stipes. The thick monocarp wall of this species appears so inflated that we wondered if the fruit might be galled. However, it is known from two different (nearby) localities in Limón, Costa Rica ( Aguilar & Schmidt 1121, Herrera C. 5227) and on both localities this aberrant fruit type has been found. Another typical feature of this species is its long-attenuate leaves and long petioles (up to 18 mm long).

Figures

Fig. 54 a. Guatteria oriximinae Maas & Westra. Fruit. – b. Guatteria pachycarpa Erkens & N.Zamora. Monocarp in cross section. – c, d. Guatteria paludosa R.E.Fr. c. Flowers;d. flower buds and bracts. – e. Guatteria procera R.E.Fr. Fruit. – f. Guatteria revoluta Maas & Westra. Rvolute leaf base, fruit and incomplete flower. – g. Guatteria rigida R.E.Fr. Fruit. – h. Guatteria ruboides Maas & Westra. Fruit (a: Cid et al. 9654, U; b: G. Herrera C. 5227, U; c, d: McDowell et al. 4815, U; e: Sperling et al. 6227, U; f: Vásquez & Jaramillo 8024, isotype U [sheet 2]; g: Anderson et al. 106, U; h: Vásquez & Jaramillo 8025, isotype AAU).

Fig. 55 Guatteria pachycarpa Erkens & N.Zamora. Branch and (separate) fertile parts (G. Herrera C. 5227, isotype U).