Amaranthus

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Amaranthus

<<<Flowers>Ovary>Stigma>Stigma number

2-31
1. 004-003-002-001

<<<Flowers>Stamens>Anthers>Locule number

4-locular2
2. 004-002-003-001

<<<Leaves>Blade>Apex>Shape

usually obtuse or truncate and apiculate3
3. 002-001-002-001

<<<Leaves>Blade>Base>Shape

cuneate and decurrent on petiole4
4. 002-001-003-001

<<Flowers>Ovary>Shape

at top rounded or thickened5
5. 004-003-001

<<Flowers>Ovary>Stigma

stigmas .6
6. 004-003-002

<<Flowers>Stamens>Anthers

anthers ;7
7. 004-002-003

<<Flowers>Stamens>Filaments

filaments free, slender,8
8. 004-002-002

<<Flowers>Stamens>Stamen number

(2)3-59
9. 004-002-001

<<Flowers>Tepals>Shape

apiculate10
10. 004-001-003

<<Flowers>Tepals>Tepal number

3-511
11. 004-001-001

<<Flowers>Tepals>Texture

scarious12
12. 004-001-002

<<Fruits>Seeds>Growth form

erect13
13. 005-001-002

<<Fruits>Seeds>Shape

lenticular or ovoid14
14. 005-001-001

<<Habit>Stems>Growth form

erect or prostrate15
15. 001-001-001

<<Habit>Stems>Hairs

glabrous to pubescent16
16. 001-001-002

<<Leaves>Blade>Apex

apex ,17
17. 002-001-002

<<Leaves>Blade>Base

base ;18
18. 002-001-003

<<Leaves>Blade>Shape

ovate, elliptical or rhombic19
19. 002-001-001

<Flowers>Ovary

ovary ,20
20. 004-003

<Flowers>Stamens

stamens ,21
21. 004-002

<Flowers>Tepals

tepals , , , often persistent;22
22. 004-001

<Fruits>Seeds

seed , , exarillate.23
23. 005-001

<Habit>Stems

stems , simple to highly branched, .24
24. 001-001

<Inflorescences>Bracts and bracteoles

bracts and bracteoles present.25
25. 003-002

<Inflorescences>Position

aggregated into axillary clusters, and often also aggregated into terminal spikes, thyrses or panicles26
26. 003-001

<Leaves>Blade

blade ,27
27. 002-001

<Leaves>Primary and secondary veins

primary and secondary venation often lighter coloured and prominent on upper surface.28
28. 002-002

Description

Annual, monoecious or dioecious, herbs; stems erect or prostrate, simple to highly branched, glabrous to pubescent. Leaves alternate, petiolate; blade ovate, elliptical or rhombic, apex usually obtuse or truncate and apiculate, base cuneate and decurrent on petiole; primary and secondary venation often lighter coloured and prominent on upper surface. Inflorescences essentially cymose, glomerules aggregated into axillary clusters, and often also aggregated into terminal spikes, thyrses or panicles; bracts and bracteoles present. Flowers unisexual; tepals 3-5, scarious, apiculate, often persistent; stamens (2)3-5, filaments free, slender, anthers 4-locular; ovary at top rounded or thickened, stigmas 2-3. Fruit a dry, circumscissile or apparently indehiscent utricle; seed lenticular or ovoid, erect, exarillate.

Distribution

Guianas present, pantropically and in warm temperate regions present
Approximately 60 species occurring pantropically and in warm temperate regions; 7 species in the Guianas.

Flowers

Flowers unisexual;29
29. 004

Fruits

Fruit a dry, circumscissile or apparently indehiscent utricle;30
30. 005

Habit

Annual, monoecious or dioecious, herbs;31
31. 001

Inflorescences

Inflorescences essentially cymose, glomerules ;32
32. 003

Leaves

Leaves alternate, petiolate;33
33. 002