Zuccagnia Cav., Icon. 5: 2. 1799

Gagnon, Edeline, Bruneau, Anne, Hughes, Colin E., de Queiroz, Luciano Paganucci & Lewis, Gwilym P., 2016, A new generic system for the pantropical Caesalpinia group (Leguminosae), PhytoKeys 71, pp. 1-160 : 66-67

21. Zuccagnia Cav., Icon. 5: 2. 1799 Figs 34D-E , 35

Type.

Zuccagnia punctata Cav.

Description.

Shrubs, 1-5 m. Stipules caducous. Leaves alternate, pinnate, (2-) 3-5 (- 6) cm long; leaflets in 5-13 subopposite pairs, elliptic-linear, rarely obovate, 4-14 × 1-3 mm, with glandular dots on both surfaces of the leaflet blades. Inflorescences terminal, erect racemes; bracts deltoid, glabrous, glandular, caducous. Flowers bisexual, zygomorphic; calyx comprising a hypanthium and 5 glabrous sepals, persistent after fruit develops, the lower sepal cucullate and covering the other four in bud; petals 5, free, yellow, obovate to broadly obovate, short-clawed, glandular trichomes on the dorsal surface of the petal blades; stamens 10, free, pubescent; ovary pilose. Fruit an ovoid-acute, oblique, laterally compressed, indehiscent (?), gall-like pod, on a short stipe and covered with long reddish brown bristles, c. 1 × 0.6 cm, 1-seeded.

Geographic distribution.

A monospecific genus restricted to Chile, NW and central-W Argentina.

Habitat.

Dry temperate upland and montane bushland and thickets on sandy plains.

Etymology.

Named by Cavanilles for the Italian physician, traveller and plant collector, Attilio Zuccagni (1754-1807).

References.

Burkart (1952: 184-185); Kiesling et al. (1994: 286); Ulibarri (2005, 2008); Nores et al. (2012).

Figures

Figure 34. Balsamocarpon brevifolium Clos. A branch with inflorescence and fruit (M. F. Gardner, Chile, Gardner & Knees 5825 (E )) B fruits with persistent calyx, C habit (P. Baxter, Chile, Baxter et al. DCI 1859 (E )). Zuccagnia punctata Cav. D flowers E fruits (I. Specogna, Flora mendocina (http: // www. floramendocina. com. ar /), Mendoza, Argentina, unvouchered). Hoffmannseggia arequipensis Ulibarri F fruits with persistent calyx, and inflorescence (C. E. Hughes, Arequipa, Peru, Hughes et al. 2342 (FHO )). Hoffmannseggia minor (Phil.) Ulibarri, G habit and inflorescence (G. P. Lewis, Bolivia, unvouchered). Hoffmannseggia humilis (Mart. & Galeotti) Hemsl. H fruit with persistent sepals (J. Neff, Puebla, Mexico, unvouchered). Stenodrepanum bergii Harms I habit J inflorescence K fruit (R. H. Fortunato, Argentina, Fortunato 9144 (BAB )).

Figure 35. Zuccagnia punctata Cav .. A flowering branchlet B infructescence C stem section D leaflet E flower (unopened) F median petal G detail of petal glands H upper lateral petal I lower lateral petal J stamen K gynoecium L stigma M fruit. A, D from Tinto 2017 B, M from Wingenroth et al. 354 C, E-L from Cabrera 30149. Drawn by Christi A. Sobel.