Agonandra

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Agonandra

Content

<<<Flowers>Stamens>Filaments>Shape

filiform1
1. 004-003-001-001

<<Flowers>Disk>Shape

lobed or annular to urceolate2
2. 004-004-001

<<Flowers>Pistil>Male flowers

in male flowers pistil rudimentary3
3. 004-005-001

<<Flowers>Stamens>Filaments

filament4
4. 004-003-001

<<Flowers>Stamens>Relative dimensions

exceeding the perianth5
5. 004-003-002

<<Flowers>Tepals>Hairs

glabrous or puberulous6
6. 004-002-001

<<Inflorescences>Rachises>Hairs

glabrous or puberulous7
7. 003-004-001

<Drupes>Length

to 2.5 cm long8
8. 005-002

<Drupes>Shape

ellipsoid9
9. 005-001

<Flowers>Disk

disc ;10
10. 004-004

<Flowers>Merosity

4-5-merous11
11. 004-001

<Flowers>Pistil

pistil with sessile stigma, .12
12. 004-005

<Flowers>Stamens

stamens with , ;13
13. 004-003

<Flowers>Tepals

tepals free, ;14
14. 004-002

<Inflorescences>Bracteoles

bracteoles minute15
15. 003-003

<Inflorescences>Bracts

bracts peltate16
16. 003-002

<Inflorescences>Flower number per bract

1-317
17. 003-001

<Inflorescences>Rachises

rachis .18
18. 003-004

<Leaves>Hairs

glabrous19
19. 002-001

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.

Drupes

Drupe , .20
20. 005

Flowers

Flowers pedicellate, , unisexual;21
21. 004

Habit

Dioecious trees or shrubs, sometimes vinelike.22
22. 001

Inflorescences

Inflorescence a raceme with flowers per bract, , ,23
23. 003

Leaves

Leaves .24
24. 002

Timber properties

TreeSmall
Description of the woodHeartwood indistinguishable from the sapwood, yellowish to light brown. Texture medium. Grain straight. Lustrous.
WeightSpecific gravity 930-950 kg per cubic metre (12%).

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 A. silvatica from Surinam. Although the species of Agonandra differ in some quantitative characters, the wood anatomy of the genus as a whole is very homogeneous in all qualitative characters. Within the Opiliaceae, it is the only genus in the wood of which cystoliths have never been reported (Koek-Noorman & Rijckevorsel, 1983).

Wood observation species

A. silvatica