Agonandra
Description
Dioecious trees or shrubs, sometimes vinelike. Leaves glabrous. Inflorescence a raceme with 1-3 flowers per bract, bracts peltate, bracteoles minute, rachis glabrous or puberulous. Flowers pedicellate, 4-5-merous, unisexual; tepals free, glabrous or puberulous; stamens with filiform filament, exceeding the perianth; disc lobed or annular to urceolate; pistil with sessile stigma, in male flowers pistil rudimentary. Drupe ellipsoid, to 2.5 cm long.
Distribution
Central and South America present, Guianas present
About 10 species in Central and South America, 2 of which occur in the Guianas.
Wood
Vessels diffuse, solitary with only incidentally two pores connected, round to oval, 10(5-13) per sq. mm, diameter 101(64-144) μm. Vessel-member length 400(200-550) μm. Perforations simple. Intervascular pits not observed. Vessel-ray and vessel-parenchyma pits half-bordered, sometimes coalescent, 830 μm. Occasionally small round or oval perforations are found. Tracheids scanty.
Rays homogeneous, uni- and 2-3-seriate, 3-4 per mm, uniseriate rays less than 5%, composed of procumbent cells, multiseriate rays composed of strongly procumbent cells with incidentally one row of weakly procumbent margin cells, height 650-800 μm.
Parenchyma apotracheal, diffuse-in-aggregates, in strands of two cells. Fibres thick-walled, walls 5-12 pm, lumen 1-2 μm. Pits distinctly bordered, frequent on tangential and radial walls, (4-)5-6 μm. Length 2400(1450-3060) μm. F/V ratio 5.5.
The description is based on material of