Stenodrepanum Harms, Notizbl. Bot. Gart. Berlin-Dahlem 7: 500. 1921

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 : 68

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Stenodrepanum Harms, Notizbl. Bot. Gart. Berlin-Dahlem 7: 500. 1921


22. Stenodrepanum Harms, Notizbl. Bot. Gart. Berlin-Dahlem 7: 500. 1921 Figs 34I-K View Figure 34 , 36 View Figure 36


Stenodrepanum bergii Harms.


Suffrutescent shrub, (10-) 20-40 cm tall, with bud-bearing and occasionally tuber-forming roots; glabrous, with globose sessile glands scattered along the branches. Stipules ovate, membranous, 2.5-4 × 2-2.5 mm. Leaves alternate, bipinnate, pinnae in 1-3 pairs plus a single terminal pinna, 4-10 cm long; leaflets in 5-9 pairs per pinna, obtuse, 5-12 × 2-5.5 mm, with a crenulate, glandular margin, and embedded glands on the lower surface. Inflorescence a lax, terminal raceme, 4-14 cm long. Flowers bisexual, zygomorphic; calyx comprising a hypanthium and 5 sepals (these not persisting in fruit), glabrous, glandular, the lower cucullate sepal covering the other four in bud; petals 5, free, yellow, the median petal with red markings, obovate, with stipitate glands on the dorsal surface; stamens 10, free, filaments pubescent and glandular; ovary glandular. Fruit a linear to slightly falcate, cylindrical, torulose pod, 30-60 × 2-2.5 mm, 1-5-seeded. Seeds ovoid.

Geographic distribution.

A monospecific genus endemic to central and western Argentina.


Subtropical wooded grassland and scrub, especially close to salt pans.


From steno - (Greek: narrow) and drepano - (Greek: sickle), in allusion to the narrow sickle-shaped fruit.


Ulibarri (1979, 2008); Kiesling et al. (1994: 285); Caponio et al. (2012); Nores et al. (2012).