Stuhlmannia Taub., Engler, Pflanzenw. Ost.-Afr. C: 201. 1895

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 : 52-54

17. Stuhlmannia Taub., Engler, Pflanzenw. Ost.-Afr. C: 201. 1895 Figs 27F-G , 28

Type.

Stuhlmannia moavi Taub.

Description.

Unarmed trees, to 25 m tall; bark brown, fissured and fibrous; young shoots eglandular or with small red glands. Stipules not seen. Leaves alternate, pinnate or bipinnate and then ending in a pair of pinnae, (1.5-) 5-11 (- 20 cm) long, pinnae in (1-) 2-10 pairs per leaf, with reddish glands; leaflets in 3-12 pairs per pinna, opposite to sub-opposite, elliptic, 7-75 (- 120) × 3-30 (- 60) mm, obtuse at the base and apex, glabrous, eglandular or with red glands on the lower surface. Inflorescence a 2-11 cm long, terminal or axillary raceme; pedicels 3-13 mm long. Flowers bisexual, sub-actinomorphic; calyx comprising a hypanthium and 5 sepals, these 5-6.5 mm long, valvate in bud, caducous; petals 5, free, yellow, the median petal with red markings, obovate, 9-12 × 3-6 mm, apex rounded, median petal slightly smaller than the others; stamens 10, free, 5.5-8 mm long, filaments pubescent; ovary stipitate, with red sessile glands, glabrous to pubescent. Fruit a flattened, oblong, woody, elliptic pod with an acuminate apex, 4.5-6 × 1.5-2 cm, dehiscing along both sutures, valves twisting, glabrous to thinly puberulous. Seeds flattened, sub-circular to ovate, c. 10-13 × 8-9 mm, brown.

Geographic distribution.

A monospecific genus in E Africa (Kenya and Tanzania) and N Madagascar.

Habitat.

Seasonally dry tropical forest, woodland on limestone and in riverine forest.

Etymology.

Named by Taubert for the German naturalist Franz Ludwig Stuhlmann (1863-1928).

References.

Brenan (1967: 45-47); Capuron (1967, under Caesalpinia insolita ); Lewis (1996); Du Puy and Rabevohitra (2002: 48, 50, under Caesalpinia insolita ); Lemmens (2010).

Figures

Figure 27. Cordeauxia edulis Hemsl. A inflorescence B open fruit with seed C undersurface of leaflets showing glands D young seedling (Jarmo Holopainen, cultivated plants in Sweden and Finland, unvouchered) E branch with flowers (M. Thulin, Somalia, unvouchered). Stuhlmannia moavi Taub. F, G inflorescence (R. Randrianaivo, Madagascar, Radrianaivo 1486 (MO, TAN )).

Figure 28. Stuhlmannia moavi Taub. A inflorescence and pinnate leaf B flower bract C flower D sepal E median petal F upper lateral petal G lower lateral petal H flower with sepals and petals removed from one side to show arrangement of stamens I stamen J lower portion of stamen filament, seen from inside the flower K lower portion of stamen filament seen from outside the flower L hypathium after fall of sepals, petals and stamens M gynoecium, N stigma and apical portion of style O detail of outer surface of ovary showing sessile glands P fruit Q seed R transverse section of seed. A from Tanner 3167 B, P-R from Tanner 3724 C-O from Tanner 2467. Drawn by E. M. Stones, originally published in Hooker's Icones Plantarum, Tab. 3626 (1967).