Desmopsis uxpanapensis G.E.Schatz, 2018

Schatz, G. E., Maas, P. J. M., Kamer, H. Maas-van de, Westra, L. Y. T. & Wieringa, J. J., 2018, Revision of the Neotropical genus Desmopsis (Annonaceae), Blumea 63 (1), pp. 67-86 : 83

23. Desmopsis uxpanapensis G.E.Schatz , sp. nov. — Fig. 4b ; Map 5

Desmopsis uxpanapensis is recognized by its young twigs and petiole densely covered with long-persisting, brownish, erect hairs, its pedicels (15–40 mm long) usually bearing a leafy basal bract, its relatively large sepals (6–12 by 3–4 mm), and equal, narrowly triangular to linear petals (15–50 by 3–8 mm). — Type: Schatz & Wendt 977 (holo MEXU; iso CHAPA, F, MO, NY, U, WIS, XAL), Mexico, Veracruz, Mun. Jesus Carranza, Zona Uxpanapa, 2 km N of Poblado , 120 m, 13 Apr. 1984 .

Tree or shrub 1.5–8 m tall, diam not recorded; young twigs and petiole densely covered with long-persisting, brownish, erect hairs to c. 0.5 mm long. Leaves: petiole 5–10 mm long, 1–2 mm diam; lamina narrowly elliptic, 10–20 by 3–8 cm, chartaceous, shiny and glabrous above, except for some hairs along primary vein, sparsely covered with appressed hairs to glabrous below, base attenuate to acute, sometimes obtuse, apex acuminate (acumen 5–20 mm long), sometimes acute, the extreme tip obtuse, primary vein impressed above, secondary veins 6–8 on either side of primary vein, raised above, tertiary veins raised above, reticulate. Inflorescence and flower indument: pedicels and outer side of bracts, sepals, and petals rather densely covered with appressed to erect hairs to subglabrous. Inflorescences 1- or 2-flowered, leaf-opposed; pedicels 15–40 mm long, c. 0.5 mm diam, to c. 2 mm diam in fruit; basal bract scale-like to usually leafy, ovate-triangular to narrowly so, 4–30 by 3–17 mm, upper bract scale-like or rarely somewhat leafy, 1–6 by 1–3 mm; sepals narrowly triangular, 6–12 by 3–4 mm, spreading to reflexed; petals yellowish green to yellow, equal, narrowly triangular to linear, 15–50 by 3–8 mm, margins revolute. Monocarps 8–15, green, to orange, maturing dark purple, spherical to ellipsoid, 10–17 by 7–15 mm, glabrous, apex rounded, not constricted between the seeds upon drying, wall 0.2–0.5 mm thick, stipes 5–13 mm long, c. 1 mm diam. Seeds 1–3, in one row, subspherical, discoid or hemispherical, 7–10 by 4–6 mm, grooved, slightly pitted.

Distribution — Mexico (S part of Veracruz).

Habitat & Ecology — In medium to tall evergreen to semi-evergreen forest in deeper soil pockets within karstic limestone. At elevations of 100– 250 m. Flowering: January to May, October; fruiting: February to April, July, October.

Vernacular name — Mexico: Anonacia.

Field observations — ‘Flowers fruity fragrant’ (Schatz & Wendt 977, 980, 981, Mexico); ‘flores con olor fuerte a plátano Maduro’ (Wendt et al. 4827, 4838, Mexico).

Other specimens examined. MEXICO, Veracruz, km 0–1 del camino plan de Arroyos-Alvaro Obregon, 140 m, Dorantes et al. 2895 (F, MEXU, MO, U, XAL); 0–2 km S del Campo Cedillo-Rumbo a Río Alegre, 140 m, Dorantes et al. 2932 (F, U, WIS, XAL); km 0–3 camino Plan de Arroyo-Río Alegre, 140 m, Dorantes et al. 3069 (XAL 2 sheets); km 3–5 camino a Río Alegre, 150 m, Dorantes et al. 3653 (XAL); camino Cedillo Carolino Maya, 150 m, Dorantes et al. 4170 (XAL); camino a Obregon a 5 km del Campamento Hnos.Cedillos, 150 m, Juan & Avendano 34 (BM, MO, XAL 2 sheets);vicinity of Campamento La Laguna, 100 m, Nee et al. 29732 (F, MO, WIS, XAL); 3 km SW of Campamento La Laguna, 100 m, Nee 30016 (F, K, MO, PRA, U, US, WIS, XAL); 3 km del Campamento Hnos. Cedillos, 150 m, Ortiz 85 (F, MEXU 2 sheets, US, XAL); Zona Uxpanapa, 2 km N of Poblado, 120 m, Schatz & Wendt 977 (MO,WIS), 980 (CHAPA, MO,WIS,XAL), 981 (CHAPA, MO, WIS, XAL); 2 km N del Poblado 2, Ejido F.J. Mina, 120 m, Vázquez et al. 2461 (MO), 2618 (MO), Villalobos et al. 15 (CHAPA, MO, WIS); 2 km al N de Uxpanapa (Pob. 12) en camino al Pob. 13, 150 m, Wendt et al. 4827 (MO); Lomas al S del Pob. 11, c. 27 km. al E. de La Laguna, cañón arriba de ‘La Cascada’, 250 m, Wendt et al. 4838 (MO).

Note — Desmopsis uxpanapensis is readily recognized by its young twigs and petiole densely covered with long-persisting, brownish, erect hairs to c. 0.5 mm long, its pedicels (15–40 mm long) usually bearing a leafy basal bract, its relatively long, narrowly triangular sepals (6–12 mm long), and monocarps with 1–3 seeds in a single row.

Figures

Fig. 4 a. Desmopsis talamancana G.E.Schatz & Maas. Fruiting branch. — b. Desmopsis uxpanapensis G.E.Schatz. Flowering branch. — c. Desmopsis wendtii G.E.Schatz. Flowering branch (a: Aguilar & Jiménez Madrigal 4317, type, U; b: Wendt et al. 4838, MO; c: Wendt et al. 4053, type, WIS).