Stuhlmannia

Taxonomy

Stuhlmannia P.H.W. Taubert In Engler, Pflanzenw. Ost.-Afr. C: 201. 1895 (post 7 Jul).

Subfamily: Caesalpinioideae.
Phylogenetic Number: 1.1.29.
Tribe: Caesalpinieae.
Group: Caesalpinia.
Species Studied - Species in Genus: 1 studied; 1 in genus.

Description

Fruit: A legumelegume:
usually dry, dehiscent fruit derived from a single carpel that opens along two longitudinal sutures
; unilocular; 5 cm long; 2 cm wide; 0.1–0.9 cm thick (guestimate); 2–9 times longer than wide; with deciduous androecial sheath; with deciduous corolla; with deciduous calyx; without orifice formed by curving of fruit or fruit segments; straight; not plicate; not twisted; symmetrical, or asymmetrical; with 1 straight and 1 curved suture; widest near middle or D-shaped; not inflated; flattened; without beak; long tapered at apex; aligned with longitudinal axis of fruit; tapered at base; aligned with longitudinal axis of fruit; with the apex and base uniform in texture; ligneous; seed chambers externally invisible; margin not constricted; margin without sulcus; margin plain; wing(s) absent; with all layers dehiscing; splitting along suture(s). Dehiscence of valves along both sutures; medial and up and down; active; with valves enrolling. Replum invisible. Epicarp glossy; monochrome; dark to olive brown; with surface texture uniform; glabrous; eglandular; without spines; not smooth; with recessed features; not veined; not tuberculate; punctate; not exfoliating; without cracks; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp present; surface not veined; 1-layered; without balsamic vesicles; without fibers; without reniform canals; solid; ligneous. Endocarp present; visible; dull; opaque; mottled; tan; with mottling more or less uniform; with pale reddish brown overlay; without adhering pieces of testa; nonseptate; not exfoliating; remaining fused to mesocarp and epicarp; entire. Seed(s) 1. Funiculus of 1 length only. Aril absent.

Seed: 14–15 mm long; 10–14 mm wide; 2–3 mm thick; not overgrown; not angular; symmetrical; circular; flattened; with surface smooth; without visible radicle and cotyledon lobes; without hilar sinus; without umbo on seed faces; without medial ridge on each face. Cuticle not exfoliating; not inflated; not wrinkled. Testa present; without pieces of adhering epicarp; not adhering to endocarp; free from endocarp; glossy; not modified by a bloom; colored; monochrome; brown; glabrous; not smooth; with recessed features; striate, or pitted with small separate pits; osseous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe not visible. Hilum present; larger than punctiform; with angular outline; not within corona, halo, or rim. Endosperm absent. Cotyledons not smooth; rugose; both outer faces convex; both the same thickness; both more or less of equal length; not folded; margin entire 180 degrees from base of radicle; similar at apex; partially concealing radicle; with lobes; with lobes not touching; with the interface division terminating at base of radicle; without margins recessed; inner face flat; glabrous on inner face. Embryonic axis straight; parallel to length of seed; without a joint evident between the radicle and the cotyledons. Radicle differentiated from cotyledon; centered between cotyledons. Plumule well developed; glabrous.

Distribution

Tanzania (Coastal forests).

Old World; Africa (Tanzania (coastal forests)).

Generic Notes

Because only valves were studied, Fruit thickness could not be determined. The hilar area of all studied seeds was missing. Lewis (pers. commun., 1986) reported that another species may be transferred to Stuhlmannia from Caesalpinia. Lewis and Schrire (1995) stated, "Stuhlmannia includes Cordeauxia" (1.1.29A), and Polhill (1994b) accepted the synonymization. Lewis (1996) accepted Stuhlmannia and Cordeauxia as montypic genera.