Serjania perulacea Radlk. Consp. Sect. Sp. Serjan.

Coulleri, Juan P., Brem, Marta C. & Ferrucci, María S., 2017, Geographic variation of Serjania perulacea (Paullinieae, Sapindaceae) and description of two new varieties, Phytotaxa 313 (1), pp. 23-42 : 34-35

Serjania perulacea Radlk. Consp. Sect. Sp. Serjan. 11. 1874.

Type:— BRAZIL: Minas Gerais, Inter Barra, corallinho et Rio Jequitaí, without date, Pohl, J. B. E. 688 (Lectotype designated here: K 000037266!).

Woody vine, generally robust, monoecious, producing milky sap; pubescent, with indument of ochraceous short single trichomes, puberulous with whitish single trichomes or glabrous. Young branches, leaves, inflorescence axes, bracts and bracteoles, leaflets, and external sepals with simple, short, ochraceous trichomes. Flowering branchlets with 5 rounded ribs, cross section of stem with central, large vascular cylinder, and 3–5 peripheral vascular cylinders of different sizes, mostly elliptic-flattened, sometimes medulla partially hollowed. Stipules triangular, persistent, 0.5–2.5 mm long, pubescent. Leaves imparipinnate, 2–3-jugate, when 2-jugate, the lower jugae 3-foliolate, when 3-jugate, the lower jugae 3-foliolate or 2-jugate, 5-foliolate; petioles subterete, adaxially furrowed, 1.1–11.4 cm long; petiolules marginate, 0.5–4.0 cm long in terminal leaflet, in the proximal and distal pair of leaflets petiolules to 1.5 cm long or absent; leaflets chartaceous or subchartaceous, discolorous; terminal leaflet narrowly ovate, ovate, widely ovate, obovate or rare widely obovate, 1.7–17 × 0.9–12 cm; the other leaflets ovate or narrowly ovate, rarely obovate, 2.5–14.4 × 1.0– 7.6 cm; apex acute, obtuse or retuse; base decurrent in terminal leaflet or acute in the proximal and distal leaflets; margins dentate-serrate, with 5–8 obtuse glandular teeth or with 7–10 acute glandular teeth, rare inciso-dentate; adaxial surface with veins slightly marked, with minute, curved, whitish trichomes, mid-vein with slightly longer pubescence and scattered bent glandular trichomes, abaxial surface pubescent with prominent veins or glabrous. Thyrse axillary, simple, racemiform; peduncle subterete, 2.5–10.4 cm long, pubescent, with 2 delicate tendrils at base; rachis subterete, striate, 4.5–12.5 cm long; cincinnus many-flowered, peduncle 6–11 mm long; pedicel 2–4.5 mm long, articulate near the base; in the fruits 3–4 mm long; bracts triangular, persistent, ca. 2 mm long, pubescent, bracteoles similar, 0.5–1 mm long. Flowers functionally staminate or pistillate, whitish, 6.5–9.6 mm long; sepals 5, ciliate, outer sepals wide ovate, obtuse, 3–4.5 × 1.7–2.5 mm, pubescent in both faces, inner sepals narrowly ovate, obtuse, 4.0–5.5 × 1.5–2.2 mm, pubescent in both faces; petals 4, obovate, clawed, erose, adaxially glandular, posterior ones broadly obovate, 4.5–5.5 × 2.0–3.0 mm, with symmetrical appendage, 3.5–4.5 × 1.0–2.0 mm, with crest erose and villous; anterior petals with asymmetrical appendage, 4.0–6.0 × 1.5–3.0 mm; nectary lobes 4, the posterior ovate obtuse, the anterior ones ovate acute and smaller, glabrous; androgynophore glabrous or puberulous. Staminate flowers: stamens 4.0– 5.5 mm long, filaments pilose; pistillode 0.5–1.7 mm long, glabrous. Pistillate flowers: sterile stamens 2.5–4.0 mm long, filaments flattened, pubescent, anthers indehiscent; gynoecium 5.5–7.0 mm long, ovary trigonous, obovoid in outline, pubescent (glandular and simple trichomes), and style straight, puberulous, 1.0– 2.5 mm long, equal than the stigmatic branches. Fruit ovate in outline, chartaceous, brown, cordate at base, cocci inflated, dark brown, 0.8–1.5 × 0.6–1.0 cm wide, narrowly cristate, crest ca. 4 mm wide, emarginate at apex, not constricted at junction with wing; mericarp 1.9–3.0 × 1.2–1.8 cm; epicarp tomentosus on cocci, wings pubescent, endocarp woolly. Seeds trigonous obovoid in outline, ca. 0.45–0.7 × 0.3–0.5 cm, smooth, dark brown, basally attached. Embryo with abaxial cotyledon curved and adaxial cotyledon biplicate.

Distribution:— Serjania perulacea is known from southern South America, particularly in Argentina, Bolivia, Brazil and Paraguay.

Taxonomic notes:— The specimen designated as lectotype was chosen from amongst the material cited by Radlkofer (1875). It is a suitable specimen as it shows all the leaf traits that defines the species and it also present complete inflorescences.