Two new species of Weinmannia (Cunoniaceae) from Machu Picchu and Oxapampa, Peru Arroyo, Frank Phytotaxa 2021 2021-05-24 502 2 185 190 8RTKH F.Arroyo F. Arroyo 2021 [136,551,338,365] Magnoliopsida Cunoniaceae Weinmannia Plantae Oxalidales 3 188 Tracheophyta species oxapampana sp. nov.   Diagnosis:—Similar to  W. chryseisDiels (1906: 414)but differing in the leaflet shape (broadly elliptic to ovate in  W. oxapampanavs. elliptic-oblong in  W. chryseis), the wingless leaf rachis (vs. winged rachis in  W. chryseis), and the inflorescence length ( 6.3–17 cmlong in  W. oxapampanavs. 14–25 cmlong in  W. chryseis).  Type:—  PERU. Pasco: Provincia Oxapampa, pass before La Suiza,  20 kmW of Oxapampa, 10°35’S 75°33’W,  2100–2150 m,  27 December 1983, Smith 5393( holotype USM, no. 104378!; isotype MO, no. 3507643 [barcode MO-2060756], photo! Image of the isotype available at. http://legacy.tropicos.org/Specimen/64757?tab=images).   TABLE 2.Comparison of  Weinmannia oxapampana, W. chryseisand  W. trianaea.     Characters   W. oxapampana   W. chryseis   W. trianaea  Height (m) 2–3 2 2–15*  Indumentum pubescent to hirsutulous hispid to tomentose hirsute to tomentose  Petiole length (mm) 5–17 3–10* 8–15*  Leaf rachis wings absent semiobovate absent or semioblanceolate*  Pairs of lateral leaflets 5–7 3–7 4–8  Lateral leaflet shape broadly elliptic to ovate elliptic oblong  Lateral leaflet size (mm) 7–35 × 6–20 13–40 × 8–20* 14–30 × 7–14*  Terminal leaflet shape ovate to ovate-elliptic elliptic to ovate* elliptic to lanceolate*  Terminal leaflet size (mm) 11–26 × 6–15 15–32 × 11–18* 20–30 × 8–11*  Leaflet margin crenate-serrate crenate-serrate crenate-serrate, revolute  Inflorescence length (cm) 6.3–17 15–25 12–15  Fascicles 2–5-flowered 4–7-flowered* 3–5-flowered*  Pedicel length (mm) 2–3 1.5–2* 2–5*  Calyx indumentum pubescent densely hispidulous* glabrous*  Petal shape elliptic elliptic* broadly oblong to rounded*  Petal size (mm) 2–2.5 × 1–1.5 1.5–2.5 × 1* ca. 2*  Stamen length (mm) 2–4 4–5 3–4*  Ovary indumentum glabrous densely hispidulous* glabrous* * Data not reported in the protologues (Diels 1906, Weddell 1857) but taken from Harling (1999)or observed in the typesat B, COL, G, K, MOL and P. Shrub 2–3 mtall; branchlets terete to slightly compressed, distally with pubescent to hirsutulous indumentum, becoming glabrous with age. Leaves opposite, imparipinnate, 5–7-jugate, 3.8–8 cmlong; lateral leaflets broadly elliptic to ovate, 7–35 × 6–20 mm, with apex rounded, obtuse or acute, rarely emarginate, margin crenate-serrate to coarsely serrate, base inequilateral; terminal leaflet shorter than laterals, ovate to ovate-elliptic, 11–26 × 6–15 mm, with apex obtuse or acute, margin crenate-serrate, base inequilateral; leaflets coriaceous, mostly conduplicate otherwise flat, glabrous and lustrous above, sparsely velvety beneath, more densely tomentose on midrib; midrib impressed above, prominent beneath, secondary veins in 11–16 pairs, secondary and tertiary venation prominulous on both sides; leaf rachis wingless, tomentose to hirsutulous; petioles terete, not winged, 5–17 mmlong, pubescent. Stipules elliptic to suborbicular, 11–15 × 10–14 mm, apex rounded, glabrous adaxially, sparsely pubescent abaxially, caducous. Pseudoracemes 6.3–17 cmlong, rachis hirsutulous, fascicles 2–5-flowered, bracteoles ovate, obovate or suborbicular, 1–2 mmlong, externally pubescent; pedicels 2–3 mmlong, pubescent; calyx lobes 4–5, ovate, 1–1.5 mmlong, pubescent, apex acute; petals 4–5, elliptic, 2–2.5 × 1–1.5 mm, glabrous, entire; stamens 8 or 10, 2– 4 mmlong; ovary ovoid, glabrous, 1–1.5 mmlong, styles 1–1.8 mmlong. Capsules septicidal, ovoid-oblong, 3–5 × 1.5–2.5 mm, glabrous, styles persistent, 1–2 mmlong; seeds not seen.   FIGURE 2.  Weinmannia oxapampana(original drawing from the isotype). A. Fruiting branchlet. B. Leaf. C. Abaxial side of leaf. D. Flower (petal removed to show pistil and some stamens). E. Petal. F. Fruit.  Notes:—  Weinmannia oxapampanashows morphological affinity with  W. chryseis(from northern Peru), in the shrubby habit, leaves velvety beneath and a similar number of coriaceous leaflets per leaf. However, the wingless rachis, the conduplicate leaflets, the shorter inflorescences and the glabrous ovary in  W. oxapampanaand other features allow to distinguish this species.  Weinmannia trianaea Weddell (1857: 211)(from Costa Rica, Colombiaand Ecuador), can also have unwinged rachises, but this feature is not constant even on leaves of the same branchlet. However, the ovate and conduplicate leaflets, the pubescent calyx and the elliptic petals of  W. oxapampanaset it apart from  W. trianaea. These three species are compared in Table 2.   Phenology:—Flowering and fruiting reported in October and December.   Distribution, ecology and conservation status: — Weinmannia oxapampanaoccurs in humid montane forests in the western part of Oxapampa Province, in the region of Pasco, (central Peru), at 2100–3000 mof elevation. The montane forests where this species grows are mostly unprotected, with deforestation for agricultural purposes being the main threat in this area. The National Park of Yanachaga-Chemillen is 3 kmfrom the locality of Perea et. al 0836, and therefore it is expected that this species may also occur there.As it is known from only two localities and its habitat is threatened, the IUCN category of Endangered (EN) is assigned.   Etymology:—The species epithet refers to the province of Oxapampa. region of Pasco, where the typespecimen was collected.  Additional specimens:—  PERU. Pasco: Provincia Oxapampa, Distrito Huancabamba, Lanturachi, sector Santa Barbara, alrededor del campamento a Milpo, 10°22’ S 75°36’W,  3000 m,  22 October 2003, Perea et al. 0836(AMAZ, HUT, MO photo!, MOL, USM). 1983-12-27 USM La Suiza Peru 2125 -10.583333 Oxapampa 1297 -75.55 3 188 1 Pasco holotype 2003-10-22 MOL, USM Peru Provincia Oxapampa 3000 -10.366667 Lanturachi 1298 -75.6 Distrito Huancabamba 5 190 1 Pasco