Maquira

<<<Fruiting perianth>Seeds>Cotyledons>Shape

thick and equal1

1. 006-004-001-001

<<<Pistillate inflorescences>Flowers>Flower number>Shape

connate2

2. 005-001-001-001

<<<Staminate inflorescences>Flowers>Perianth>Lobe number

4-lobed3

3. 004-002-002-001

<<<Staminate inflorescences>Flowers>Perianth>Part number

4-parted4

4. 004-002-002-002

<<Fruiting perianth>Seeds>Cotyledons

cotyledons .5

5. 006-004-001

<<Leaves>Branches>Position

lateral6

6. 002-001-001

<<Pistillate inflorescences>Flowers>Flower number

many and free, a few and , or one7

7. 005-001-001

<<Pistillate inflorescences>Perianth>Lobe number

4-lobed to 4-fid8

8. 005-002-001

<<Pistillate inflorescences>Stigma>Shape

tongue-shaped9

9. 005-004-002

<<Pistillate inflorescences>Stigma>Stigma number

210

10. 005-004-001

<<Staminate inflorescences>Flowers>Flower number

several to numerous11

11. 004-002-001

<<Staminate inflorescences>Flowers>Perianth

perianth to ;12

12. 004-002-002

<<Staminate inflorescences>Stamens>Stamen number

(3-)413

13. 004-003-001

<Fruiting perianth>Colour

orange14

14. 006-002

<Fruiting perianth>Fruits

fruit adnate to the perianth;15

15. 006-003

<Fruiting perianth>Seeds

seed large, without endosperm,16

16. 006-004

<Fruiting perianth>Texture

fleshy17

17. 006-001

<Inflorescences>Shape

discoid-capitate18

18. 003-001

<Leaves>Blade

blade entire, pinnately veined.19

19. 002-003

<Leaves>Branches

distichous on the branches20

20. 002-001

<Leaves>Stipules

stipules amplexicaul, free;21

21. 002-002

<Pistillate inflorescences>Flowers

flowers ;22

22. 005-001

<Pistillate inflorescences>Ovary

ovary adnate to the perianth;23

23. 005-003

<Pistillate inflorescences>Perianth

perianth ;24

24. 005-002

<Pistillate inflorescences>Stigma

stigmas , .25

25. 005-004

<Staminate inflorescences>Flowers

flowers ,26

26. 004-002

<Staminate inflorescences>Inflorescence number

mostly several together27

27. 004-001

<Staminate inflorescences>Pistillode

pistillode absent.28

28. 004-004

<Staminate inflorescences>Stamens

stamens ;29

29. 004-003

Citation

Aubl. 1775 – In: Hist. Pl. Guiane. t. 389

Description

Trees, dioecious or monoecious. Leaves alternate, distichous on the lateral branches; stipules amplexicaul, free; blade entire, pinnately veined. Inflorescences on spurs in the leaf axils, unisexual, discoid-capitate, involucrate. Staminate inflorescences mostly several together, pedunculate; flowers several to numerous, perianth 4-lobed to 4-parted; stamens (3-)4; pistillode absent. Pistillate inflorescences mostly solitary, subsessile or pedunculate; flowers many and free, a few and connate, or one; perianth 4-lobed to 4-fid; ovary adnate to the perianth; stigmas 2, tongue-shaped. Fruiting perianth enlarged, fleshy, orange; fruit adnate to the perianth; seed large, without endosperm, cotyledons thick and equal.

Distribution

Guianas present, Neotropics present

Neotropics, 4 species; in the Guianas 2 species.

Fruiting perianth

Fruiting perianth enlarged, , ;30

30. 006

Habit

Trees, dioecious or monoecious.31

31. 001

Inflorescences

Inflorescences on spurs in the leaf axils, unisexual, , involucrate.32

32. 003

Leaves

Leaves alternate, ;33

33. 002

Notes

A recent sterile collection (Sabatier 1533) made in French Guiana, Montagne de Nouragues, near Arataye River, suggests the occurrence of M. calophylla (Poepp. & Endl.) C.C. Berg. This species resembles M. guianensis in its leaf venation, but is distinct from the latter in the smaller staminate inflorescences (less than 0.8 cm in diam.) and in the pistillate inflorescences, which have only one or a few, connate flowers.

Pistillate inflorescences

Pistillate inflorescences mostly solitary, subsessile or pedunculate;34

34. 005

Staminate inflorescences

Staminate inflorescences , pedunculate;35

35. 004

Wood

Vessels diffuse, with a slight tendency towards a diagonal arrangement, solitary (40-90%) and in short radial multiples of 2-4, round to oval, 5-17 per sq. mm, diameter 100-155 μm. Vessel-member length: 505-575 μm. Perforations simple. Intervascular pits alternate, round, oval to polygonal, 7-9 μm. Vessel-ray and vessel-parenchyma pits larger and irregularly shaped, half-bordered. Thin-walled tyloses often present.
Rays uniseriate and 3-5-seriate, 6-8 per mm, up to 360-1150 μm high. Heterogeneous, composed of procumbent cells, except for the uniseriate margins of 1-3 rows of square and/or upright cells. Few sheath cells. Radial latex tubes generally present, though sometimes very infrequent. Rhombic crystals sometimes present in the marginal ray cells.
Parenchyma paratracheal, variable, wide to narrow vasicentric- aliform with short wings to confluent and in narrow bands, sometimes wavy. Strands of 3-4 cells. Rhombic crystals very scarce.
Fibres all or partly septate, lumen 5-9 μm, walls 3-5 μm. Pits simple, small, restricted to the radial walls. Gelatinous fibres occasionally present. Length: 1100-1410 μm. F/V ratio: 2.0-2.8.
Vitreous silica sometimes present in the axial parenchyma, rarely also in the vessels and fibres.

Wood observation species

M. calophylla, M. guianensis, M. sclerophylla

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