Ruizodendron R.E.Fr.

Erkens, Roy H. J., Oosterhof, Jessica, Westra, Lubbert Y. T. & Maas, Paul J. M., 2017, Revisions of Ruizodendron and Pseudephedranthus (Annonaceae) including a new species and an overview of most up-to-date revisions of Neotropical Annonaceae genera, PhytoKeys 86, pp. 75-96 : 80

Ruizodendron R.E.Fr.

Ruizodendron R.E.Fr., Arkiv för Botanik Ser. 28B (4): 3. 1936.

Type.

Ruizodendron ovale (Ruiz & Pav.) R.E.Fr. (= Guatteria ovalis Ruiz & Pav.)

Description.

Trees, often with buttresses; young twigs lenticellate. Leaves: distichous, simple, entire, shortly petiolate, exstipulate; lamina medium-sized, mostly elliptic, venation brochidodromous to eucamptodromous, articulated at the base, primary vein slightly raised to flat above, glaucous below. Flowers actinomorphic, bisexual, perianth consisting of one whorl of sepals and two whorls of petals; pedicels with basal articulation and 2 soon falling bracts; sepals 3, imbricate, free, much shorter than the petals, soon falling; petals 6, imbricate, free, subequal; stamens ca. 40, extrorse, filament very short, connective apex discoid, glabrous; carpels ca. 25, spirally arranged, free, ovary 1-locular with 1 ovule attached below the middle, style absent, stigma ovoid, hairy. Fruit apocarpous, composed of few indehiscent monocarps, these transversely ellipsoid, the stipe laterally attached. Seed 1, filling the whole monocarp, orange-brown, rumination lamellate in 2 parts, raphe a fine, shallow groove.

Distribution.

Monotypic, occurring in the western part of South America (Fig. 1 ).

Figures

Figure 1. Distribution map of Ruizodendron ovale, Pseudephedranthus fragrans and P. enigmaticus.