Ptychopetalum

<<<Calyx>Ovary>Ovules>Growth form

pendent1

1. 003-005-002-002

<<<Calyx>Ovary>Ovules>Ovule number

2 or 32

2. 003-005-002-001

<<<Calyx>Ovary>Stigma>Lobe number

3-lobed3

3. 003-005-004-002

<<<Calyx>Ovary>Stigma>Shape

subcapitate4

4. 003-005-004-001

<<<Calyx>Ovary>Style>Shape

rather short, slenderly columnar5

5. 003-005-003-001

<<<Calyx>Petals>Shape>Texture

membranous6

6. 003-002-002-001

<<<Calyx>Stamens>Anthers>Shape

oblong7

7. 003-003-004-001

<<Calyx>Ovary>Locule number

1-locular8

8. 003-005-001

<<Calyx>Ovary>Ovules

with anatropous ovules9

9. 003-005-002

<<Calyx>Ovary>Stigma

stigma , .10

10. 003-005-004

<<Calyx>Ovary>Style

style ,11

11. 003-005-003

<<Calyx>Petals>Hairs

hairy within12

12. 003-002-003

<<Calyx>Petals>Petal number

(4-)5(-6)13

13. 003-002-001

<<Calyx>Petals>Shape

linear-oblong, concave, inflexed with their crenulate margin14

14. 003-002-002

<<Calyx>Stamens>Anthers

anthers small, ;15

15. 003-003-004

<<Calyx>Stamens>Epipetalous stamens

the epipetalous ones shorter, their filaments adnate to the petals16

16. 003-003-002

<<Calyx>Stamens>Episepalous stamens

the episepalous ones longer, their filaments almost free17

17. 003-003-003

<<Calyx>Stamens>Stamen number

usually twice the number of petals, rarely fewer by abortion18

18. 003-003-001

<<Drupes>Endocarp>Texture

crustaceous19

19. 004-002-001

<<Drupes>Seeds>Endosperm

endosperm copious, corrugate-sublobate, exclusively containing fatty substances, with a small embryo at its apex.20

20. 004-003-002

<<Drupes>Seeds>Seed number

121

21. 004-003-001

<<Flowers>Racemes>Flower number per raceme

few-flowered22

22. 002-002-002

<<Flowers>Racemes>Position

axillary23

23. 002-002-001

<Calyx>Disk

disc obscure;24

24. 003-004

<Calyx>Ovary

ovary free, , ,25

25. 003-005

<Calyx>Petals

petals , initially coherent, finally free, , ;26

26. 003-002

<Calyx>Stamens

stamens , , ,27

27. 003-003

<Calyx>Teeth or lobe number

5(-6)-dentate or -lobed28

28. 003-001

<Drupes>Endocarp

endocarp29

29. 004-002

<Drupes>Pericarp

thin pericarp30

30. 004-001

<Drupes>Seeds

seed ,31

31. 004-003

<Flowers>Heterostyly

heterostylous32

32. 002-001

<Flowers>Pedicels

pedicels subtended by a caducous bracteole.33

33. 002-003

<Flowers>Racemes

arranged in short racemes34

34. 002-002

Calyx

Calyx small, , not accrescent;35

35. 003

Description

Glabrous shrubs or trees. Flowers heterostylous, fragrant, arranged in short axillaryfew-flowered racemes; pedicels subtended by a caducous bracteole. Calyx small, 5(-6)-dentate or -lobed, not accrescent; petals (4-)5(-6), initially coherent, finally free, linear-oblong, concave, inflexed with their membranous crenulate margin, hairy within; stamens usually twice the number of petals, rarely fewer by abortion, the epipetalous ones shorter, their filaments adnate to the petals, the episepalous ones longer, their filaments almost free, anthers small, oblong; disc obscure; ovary free, 1-locular, with 2 or 3 anatropous pendent ovules, style rather short, slenderly columnar, stigma subcapitate, 3-lobed. Drupe with a thin pericarp and crustaceous endocarp; seed 1, endosperm copious, corrugate-sublobate, exclusively containing fatty substances, with a small embryo at its apex.

Distribution

Guianas present, tropical South America present, tropical W and C Africa present

4 species, 2 in tropical W and C Africa, and 2 in tropical South America, 1 of these in the Guianas.

Drupes

Drupe with a and ;36

36. 004

Flowers

Flowers , fragrant, ;37

37. 002

Habit

Glabrous shrubs or trees.38

38. 001

Wood

Vessels diffuse, solitary (8-32%) and in radial multiples of 2-4, round to oval or slightly angular, 12-34 per sq. mm, diameter 45-101 μm. Vessel- member length: 515-900 μm. Perforations simple. Intervascular pits alternate, round to polygonal, 3-6 μm. Vessel-ray and vessel-parenchyma pits of two types: half-bordered diffuse to alternate (similar in shape and size to intervascular pits) and large and simple.
Vascular tracheids associated with vessel multiples, sometimes integrating with narrow vessel elements, common.
Rays of Kribs' heterogeneous type II to III, uni-seriate and with short hi- seriate central parts, 13-20 per mm, up to 924 μm high. Perforated ray cells infrequently present.
Parenchyma abundant, predominantly apotracheal, diffuse, in small aggregates or in narrow irregular bands, partly paratracheal, in strands of 7-10 cells.
Ground tissue composed of very thick-walled libriform fibres, lumen 16-24 μm. Minutely bordered pits with slit-like apertures mainly confined to the radial walls. Length: 1394-3058 μm.
Silica bodies irregular to globular, with a coarsely granular surface, fairly common to abundant in ray cells, predominantly one per cell, diameter varying from 10-30 μm.
Crystals solitary rhomboidal, fairly common in chambered axial parenchyma cells, infrequent to common in ray cells.

Wood observation species

P. olacoides, P. uncinatum

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