Guatteria griseifolia Maas & Westra, 2011

8. Guatteria griseifolia Maas & Westra View in CoL , sp. nov. — Fig. 8b, c View Fig , 10 View Fig ; Map 3

Ramulis saepe alatis,foliis griseo-viridibus apice rotundatis vel breviter acuminatis costa subtus saepe alata distincta.— Typus: Gentry et al. 30941 (holo U, 2 sheets;iso MO), Ecuador, Morona-Santiago, Campamento La Playa , road construction camp 23 km SE of San Juan Bosco, 1050 m, 28 Jan. 1981 .

Guatteria sp. 4 Chatrou et al. (1997) 110.

Tree 4 –20 m tall, c. 10 cm diam; young twigs rather densely to sparsely covered with appressed hairs, soon glabrous, often with narrow wings, initiating below leaf insertion. Leaves: petiole 5 –10 mm long, 4– 5 mm diam; lamina narrowly obovate to narrowly elliptic, 18– 35 by 6 –13 cm (leaf index 2 –3), chartaceous, sparsely verruculose, slightly to distinctly shiny, greyish green above, greenish brown below, glabrous above, sparsely covered with appressed hairs below, base acute, sometimes obtuse, apex obtuse to rounded or shortly acuminate (acumen up to 15 mm long), primary vein impressed above, often keeled below, secondary veins distinct, 12–17 on either side of primary vein, raised above, smallest distance between loops and margin 3 –5 mm, tertiary veins reticulate, slightly raised above. Flowers in 1–2-flowered inflorescences in axils of leaves, to several-flowered on older branchlets; pedicels 20– 30 mm long, 2–3 mm diam, fruiting pedicels 20– 50 mm long, 2 – 3 mm diam, rather densely to sparsely covered with appressed hairs, articulated at 0.1–0.2 from the base, bracts 5 – 6, soon falling, the upper bract broadly elliptic, up to c. 7 mm long; flower buds broadly ovoid; sepals free, broadly ovate-triangular, 8 –9 by 7–8 mm, appressed, outer side densely covered with appressed hairs; petals greenish yellow to brownish yellow in vivo, ovate, 13– 20 by 10–12 mm, outer side densely covered with appressed hairs; stamens 2 – 2.5 mm long, connective shield papillate. Monocarps 50–100, white (mentioned on two labels) or green, maturing dark purple to black in vivo, black in sicco, ellipsoid, 10–17 by 5 – 6 mm, sparsely covered with appressed hairs to glabrous, apex apiculate (apiculum < 0.5 mm long), wall 0.1–0.2 mm thick, stipes 1– 3 by 1 mm. Seed ellipsoid, 10–15 by 4–7 mm, shiny brown, pitted to brain-like.

Distribution — Ecuador ( Morona-Santiago, Zamora-Chinchipe) and Peru ( San Martín).

Habitat & Ecology — In non-inundated forest (cloud forest with abundant epiphytes, “bosque perennifolia”, forest on limestone derived soil, locally with thick humus layer). At elevations of 900 –2400 m. Flowering: January, July, November, December; fruiting: March, June, October to December.

Vernacular names — None.

Other specimens examined. ECUADOR, Morona-Santiago, Gualaquiza, Cordillera del Cóndor, Valley of Río Quimi , 1300 m, 10 Dec. 2000, Neill et al. 12948 ( U) . Zamora-Chinchipe, Nangaritza,region of Cordillera del Cóndor, near ‘ Las Orquídeas’ , 890 m, 9 Nov.2006, Kajekai 960 ( MO, WAG) ; Cantón Nangaritza, Pachicutza, road to Hito , Cordillera del Cóndor , 1200–1300 m, 20 Oct. 1991, Palacios et al. 8401 ( MO, U) ; Yacuambi, Parroquia La Paz, Centro Shuar Kiim , Reserva Tiwi Nunka , between Centro Shuar Kiim and Cordillera Chiichim Naint, 2400 m, 15 June 2006, Wisum et al. 584 ( MO, WAG) . – PERU, San Martín, Prov. Rioja, Distr. Pardo Miguel, Venceremos , Caserío El Afluente, 1440–1520 m, 14 Nov. 1996, Sánchez­Vega & Dillon 8682 ( U) ; Prov. Rioja, Distr. Pardo Miguel, Caserío Jorge Chavez , km 398 of Carretera Marginal , 1400 m, 1 July 1999, Sánchez­Vega et al. 9971 ( U) ; along road from Rioja to Pedro Ruiz, about bridge Serranoyacu , 1170 m, 5 Mar. 2001, Van der Werff et al. 16768 ( U) .

Note — Guatteria griseifolia is listed as “ Guatteria sp. 4 , sect. Mecocarpus , black leaf” in Chatrou et al. (1997). It occurs at quite high elevations in Ecuador and Peru and it can be distinguished by the often winged young twigs, greyish green leaves (hence the specific epithet), a leaf apex varying from obtuse, rounded, to shortly acuminate and an often keeled midrib.