Cyathula

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Cyathula

<<<Flowers>Ovary>Ovules>Ovule number

11
1. 004-003-001-001

<<<Flowers>Ovary>Stigma>Shape

capitate2
2. 004-003-003-001

<<<Flowers>Ovary>Style>Shape

filiform3
3. 004-003-002-001

<<<Flowers>Stamens>Anthers>Locule number

2-locular4
4. 004-002-002-001

<<<Flowers>Stamens>Anthers>Shape

oblong5
5. 004-002-002-002

<<<Flowers>Stamens>Pseudostaminodes>Pseudostaminode number

56
6. 004-002-003-001

<<<Inflorescences>Glomerules>Triads>Fertile flower number

17
7. 003-003-001-001

<<<Inflorescences>Glomerules>Triads>Sterile flower number

28
8. 003-003-001-002

<<Flowers>Ovary>Ovules

ovule ,9
9. 004-003-001

<<Flowers>Ovary>Stigma

stigma , glandular.10
10. 004-003-003

<<Flowers>Ovary>Style

style ,11
11. 004-003-002

<<Flowers>Stamens>Anthers

anthers , ,12
12. 004-002-002

<<Flowers>Stamens>Pseudostaminodes

pseudostaminodia , fringed, alternating with fertile stamens;13
13. 004-002-003

<<Flowers>Stamens>Stamen number

514
14. 004-002-001

<<Flowers>Tepals>Hairs

often hairy15
15. 004-001-002

<<Flowers>Tepals>Tepal number

516
16. 004-001-001

<<Fruits>Seeds>Shape

ellipsoid17
17. 005-001-001

<<Inflorescences>Bracts>Shape

ovate, oblong, acuminate18
18. 003-004-001

<<Inflorescences>Glomerules>Triads

comprised of bracteate triads of central bisexual fertile and modified sterile flowers formed of uncinate, straight or glochidiate spines, all falling together as fruit19
19. 003-003-001

<<Inflorescences>Shape>Position

terminal spikes and subglobose or cylindrical20
20. 003-001-001

<<Inflorescences>Unisexual flowers>Awn or spine number

521
21. 003-005-001

<Flowers>Ovary

ovary obovoid,22
22. 004-003

<Flowers>Stamens

stamens , united at base into a tube,23
23. 004-002

<Flowers>Tepals

tepals , free, ;24
24. 004-001

<Fruits>Seeds

seed compressed, .25
25. 005-001

<Habit>Growth form

Prostrate to erect26
26. 001-001

<Inflorescences>Bracts

bracts ;27
27. 003-004

<Inflorescences>Flowers

fertile and sterile flowers clustered in shortly pedunculate glomerules along major axes;28
28. 003-002

<Inflorescences>Glomerules

glomerules ;29
29. 003-003

<Inflorescences>Shape

sometimes capitate, usually comprised of long, axillary30
30. 003-001

<Inflorescences>Unisexual flowers

unisexual flowers reduced to tepals with rigid, hooked awns or spines (glochidia), developing in axils of bracteoles after bisexual flowers.31
31. 003-005

<Leaves>Shape

rhombic-ovate32
32. 002-001

Description

Prostrate to erect, annual or perennial herbs, becoming suffruticose near base. Leaves opposite, entire, petiolate, rhombic-ovate. Inflorescence sometimes capitate, usually comprised of long, terminal spikes and subglobose or cylindrical axillary spikes; fertile and sterile flowers clustered in shortly pedunculate glomerules along major axes; glomerules comprised of bracteate triads of 1 central bisexual fertile and 2 modified sterile flowers formed of uncinate, straight or glochidiate spines, all falling together as fruit; bracts ovate, oblong, acuminate; unisexual flowers reduced to tepals with 5 rigid, hooked awns or spines (glochidia), developing in axils of bracteoles after bisexual flowers. Flowers becoming reflexed early in development; tepals 5, free, often hairy; stamens 5, united at base into a tube, anthers 2-locular, oblong, pseudostaminodia 5, fringed, alternating with fertile stamens; ovary obovoid, ovule 1, style filiform, stigma capitate, glandular. Fruit a thin-walled, indehiscent capsule; seed compressed, ellipsoid.

Distribution

Guianas present, Old and New World tropics present
Approximately 25-30 species indigenous to the Old and New World tropics; 2 species naturalized as weeds in the Guianas.

Flowers

Flowers becoming reflexed early in development;33
33. 004

Fruits

Fruit a thin-walled, indehiscent capsule;34
34. 005

Habit

, annual or perennial herbs, becoming suffruticose near base.35
35. 001

Inflorescences

Inflorescence spikes;36
36. 003

Leaves

Leaves opposite, entire, petiolate, .37
37. 002