Maburea

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Maburea

Content

<<<Calyx>Ovary>Stigma>Lobe number

3-lobed1
1. 005-005-004-001

<<<Calyx>Petals>Lobes>Shape

triangular2
2. 005-003-003-001

<<<Calyx>Stamens>Anthers>Shape

subquadrate-suborbicular3
3. 005-004-003-001

<<<Calyx>Stamens>Filaments>Shape

filiform, adnate to the basal parts of the petals4
4. 005-004-002-001

<<Calyx>Ovary>Hairs

glabrous5
5. 005-005-001

<<Calyx>Ovary>Locule number

2-3-locular6
6. 005-005-002

<<Calyx>Ovary>Stigma

stigma very slightly .7
7. 005-005-004

<<Calyx>Ovary>Style

style very short,8
8. 005-005-003

<<Calyx>Petals>Lobes

lobes ;9
9. 005-003-003

<<Calyx>Petals>Petal number

510
10. 005-003-001

<<Calyx>Petals>Shape

connate in the lower part11
11. 005-003-002

<<Calyx>Stamens>Anthers

anthers ;12
12. 005-004-003

<<Calyx>Stamens>Filaments

filaments ,13
13. 005-004-002

<<Calyx>Stamens>Stamen number

1014
14. 005-004-001

<<Drupes>Endocarp>Texture

thin woody15
15. 006-002-001

<<Drupes>Exocarp>Texture

fleshy16
16. 006-001-001

<<Habit>Trunk>Shape

basally swollen17
17. 001-001-001

<<Inflorescences>Shoots>Position

axillary18
18. 003-003-001

<Calyx>Ovary

ovary superior, , ,19
19. 005-005

<Calyx>Petals

petals , ,20
20. 005-003

<Calyx>Shape

cupuliform21
21. 005-001

<Calyx>Stamens

stamens ,22
22. 005-004

<Calyx>Teeth number

5-denticulate23
23. 005-002

<Drupes>Endocarp

endocarp24
24. 006-002

<Drupes>Exocarp

exocarp25
25. 006-001

<Drupes>Seed number

126
26. 006-003

<Flowers>Bracteole number per flower

227
27. 004-001

<Habit>Trunk

trunk28
28. 001-001

<Inflorescences>Flower number per cluster

1-3(-4)-flowered29
29. 003-002

<Inflorescences>Position

axillary30
30. 003-001

<Inflorescences>Shoots

grouped on spike-like short shoots31
31. 003-003

<Leaves>Vein number

3-5-veined32
32. 002-001

Calyx

Calyx , , small, persistent, not accrescent;33
33. 005

Description

Trees, trunk basally swollen. Leaves distinctly 3-5-veined. Inflorescences axillary, 1-3(-4)-flowered clusters in the upper axils of normal or aborted leaves, or grouped on spike-like axillary short shoots. Flowers hypogynous, small, subsessile, each flower subtended by a bract and 2 minute bracteoles. Calyx cupuliform, 5-denticulate, small, persistent, not accrescent; petals 5, connate in the lower part, lobes triangular; stamens 10, filaments filiform, adnate to the basal parts of the petals, anthers subquadrate-suborbicular; ovary superior, glabrous, 2-3-locular, style very short, stigma very slightly 3-lobed. Drupe with fleshy exocarp, thin woody endocarp and 1 large seed.

Distribution

Guyana endemic
Monotypic, endemic in Guyana.

Drupes

Drupe with , and large seed.34
34. 006

Flowers

Flowers hypogynous, small, subsessile, each flower subtended by a bract and minute bracteoles.35
35. 004

Habit

Trees, .36
36. 001

Inflorescences

Inflorescences , clusters in the upper axils of normal or aborted leaves, or .37
37. 003

Leaves

Leaves distinctly .38
38. 002

Wood

Vessels diffuse, solitary (up to 98%) and few multiples of 2, round and slightly oval or angular, 14-15(12-19) per sq. mm, diameter 80-89(35-125) μm. Vessel-member length: 1345-1760 μm. Perforations scalariform, with 16-28 bars per perforation.
Intervascular pits rare, scalariform to opposite. Vessel-ray and vessel-parenchyma pits large, often scalariform. Tyloses sometimes present.
Rays of Krebs' heterogeneous type I, uniseriate and 2-3 seriate, the unise- riate rays composed of upright cells, the multiseriate rays composed of square and procumbent cells, but upright cells in the large uniseriate parts of these rays, 13(12-18) per mm, up to 4300 μm high.
Parenchyma scanty paratracheal, but the majority as apotracheal diffuse. Fibre-tracheids, thick-walled, lumen up to 9,urn, walls 7-8 μm. Pits borde- red, on radial and tangential walls, diameter of borders 6-8 μm. Length: 2245-2770 μm. F/V ratio: 1.57-1.67.
Crystals solitary rhomboidal, in parenchyma and in (subdivided) ray cells.

Wood observation species

M. trinervis