Cecropia manauara D. Aguiar, Demarchi & Gaglioti, 2025

Aguiar, Daniel Praia Portela de, Demarchi, Layon Oreste, Piedade, Maria Teresa Fernandez, Collevatti, Rosane Garcia, Da-Silva, Paulo Roberto, Souza, Henrique Borges Zamengo de & Gaglioti, André Luiz, 2025, Cecropia manauara (Urticaceae), a new species from the Brazilian Amazon, Acta Botanica Brasilica (e 20230159) 39, pp. 1-11 : 4-6

Cecropia manauara D. Aguiar, Demarchi & Gaglioti , sp. nov. ( Figs. 3-4 Tab. 2)

Type: BRAZIL – Amazonas • Manaus, Tarumã, INFRAERO Operational Area ; 3º1’44,13’’ S, 60º2’57,77’’ W; 86 m; 2 Jun. 2018; Demarchi 1212; holotype: INPA [ INPA280583 ]; isotype: SP [ SP499173 ] .

Diagnosis: Cecropia manauara can be differentiated from C. membranacea by the arachnoid indumentum on the petiole (absent in C. membranacea ), and from C. concolor by the

hirtellous to setulose stipule (vs. puberulous to sericeous in C. concolor ) and by the secondary veins submarginally loop-connected (vs. marginally in C. concolor ). In addition, it can be differentiated by the length of the perianth of the staminate flower (0.2–0.4 mm in C. manauara vs. 0.8 mm in C. membranacea and 0.8–1.5 mm in C. concolor ).

Description: Tree, 10–20 m tall. Leafy twigs 2–4 cm thick, green, hispidulous to setose. Lamina (sub)coriaceous, 35–55 × 35–55 cm, the segments 8–9, the free parts of the upper segments (sub)obovate to elliptic to oblong, the incisions down to 4.3–9.5 cm from the petiole; apices acuminate; upper surface smooth, sparsely hispidulous to sparsely setulose and with sparse to dense arachnoid indumentum; lower surface puberulous to (sub)hispidulous on the areoles, sometimes with sparse to dense arachnoid indumentum and sparse longer uncinate hairs; puberulous to hispidulous and sometimes subsetulose and/or with arachnoid indumentum on the main veins; lateral veins in the free part of the midsegment 12–16 pairs, submarginally loop-connected, several of them branched; petiole 27–56 cm long, sericeous to (sub)hispidulous, sparse to dense arachnoid indumentum, sometimes setose at the base; trichilia fused, the brown indumentum intermixed with short and/or rather long whitish hairs; stipules 9–14.5 cm long, grayish, orange or reddish, hirtellous to setulose indument, sometimes sparsely sericeous outside, glabrous inside. Staminate inflorescences in pairs, the peduncle erect to deflexed and the spikes pendulous; peduncle 5.4–14 cm long, sericeous to hispidulous, sometimes also setulose; spathe 8–18 cm long, whitish to pale yellowish, indument due sericeous to hirtellous outside, glabrous inside; spikes 7–25, 8–17.5 × 0.4–0.8 cm, with stipes 0.5–1.1 cm long, with indumentum whitish, hirtellous and strigose; rachis hairy. Staminate flowers: perianth tubular, 0.2–0.4 mm long, indumentum whitish, strigulose in the apex and hirsute below the margin, the apex plane to slightly convex, muriculate, the aperture often surrounded by a rim; filaments slightly swollen; anthers 0.2–0.4 mm long, appendiculate, detached at anthesis, reattached to the margins of the aperture by the appendages. Pistillate inflorescences in pairs, the peduncle deflexed to pendulous and the spikes pendulous; peduncle 9.3–16.8 cm long, sericeous to hispidulous, sometimes also setulose; spathe 11.7–15 cm long, the color and indumentum as in the staminate inflorescence; spikes 4, 9.8–10.9 × 0.6–0.7 cm, to 19.4–23.2 in flower × 0.6–1.0 cm in fruit, with stipes 0.4–0.7 cm long, with indumentum hirtellous and strigose, whitish; rachis hairy. Pistillate flowers: perianth tubular, 0.5–1 mm long, with arachnoid indumentum below the

Figures

Figure 3. Holotype of Cecropia manauara. Photograph by Layon Demarchi.

Figure 4. Morphological characteristics of Cecropia manauara. A. Adult tree. B. Detail for a leafy twig of a staminate individual. C. Detail for stipule and spathe. D. Leaf twig trichomes. E. Upper and lower lamina surface. F. Staminate inflorescence. G. Staminate flower. H. Pistillate inflorescence I. Pistillate flower. Scale: A. 2.5 m; B. 7.5 cm; C. 2 cm; D. 1 mm; E. 10 cm; F. 2 cm; G. 0.05 mm; H. 5 cm; I. 0.15 mm. A and B from Demarchi 1763; C and H from Demarchi 1212; D from Demarchi 1229; E and F from Demarchi 1387. Photographs were taken at the type locality from 2018 to 2021 by Daniel Aguiar (A, B, C, E, F, H), and in the laboratory by Layon Demarchi (D); illustrations by André Gaglioti (G, I).