Amaranthus blitum

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Amaranthus blitum

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<<<<Female flowers>Tepals>First two tepals>Shape>Length

0.9-2 mm long1
1. 005-001-002-001-001

<<<<Female flowers>Tepals>First two tepals>Shape>Relative dimensions

about 1/2 to 2/3 the length of mature utricle2
2. 005-001-002-001-002

<<<<Male flowers>Tepals>Midveins>Incurvation>Stamen number

(2)33
3. 004-001-004-002-001

<<<Female flowers>Ovary>Style>Growth form

erect4
4. 005-002-002-002

<<<Female flowers>Ovary>Style>Style number

(2-)35
5. 005-002-002-001

<<<Female flowers>Tepals>First two tepals>Shape

linear-oblong to somewhat spathulate, , , obtuse or subacute6
6. 005-001-002-001

<<<Inflorescences>Bracteoles>Shape>Length

to 1 mm long7
7. 003-004-001-002

<<<Inflorescences>Bracteoles>Shape>Relative dimensions

1/2 to 1/3 as long as tepals8
8. 003-004-001-001

<<<Male flowers>Tepals>Midveins>Colour

green9
9. 004-001-004-001

<<<Male flowers>Tepals>Midveins>Incurvation

incurved over stamens10
10. 004-001-004-002

<<<Male flowers>Tepals>Shape>Length

0.8-1.3 mm long11
11. 004-001-003-001

<<<Petiole>Blade>Shape>Dimensions

(0.7-)2-6(-7.5) x (0.2-)2.7-5 cm12
12. 002-002-001-001

<<<Petiole>Blade>Shape>Relative distance

to 3 mm13
13. 002-002-001-002

<<Female flowers>Ovary>Shape

oblong14
14. 005-002-001

<<Female flowers>Ovary>Style

styles , .15
15. 005-002-002

<<Female flowers>Tepals>First two tepals

2 are16
16. 005-001-002

<<Female flowers>Tepals>Tepal number

317
17. 005-001-001

<<Female flowers>Tepals>Third tepal

third tepal shorter, scale-like18
18. 005-001-003

<<Habit>Stems>Colour

often pinkish to deep red19
19. 001-003-002

<<Habit>Stems>Hairs

glabrous20
20. 001-003-001

<<Inflorescences>Bracteoles>Shape

lanceolate, oblong or ovate, , , acute or obtuse21
21. 003-004-001

<<Inflorescences>Bracts>Shape

linear, acuminate, aristate22
22. 003-003-001

<<Male flowers>Tepals>Colour

hyaline23
23. 004-001-002

<<Male flowers>Tepals>Midveins

midvein , .24
24. 004-001-004

<<Male flowers>Tepals>Shape

oblong, ovate or elliptical, , acute25
25. 004-001-003

<<Male flowers>Tepals>Tepal number

326
26. 004-001-001

<<Petiole>Blade>Hairs

glabrous27
27. 002-002-002

<<Petiole>Blade>Shape

often rhomboid, sometimes ovate or elliptical, , usually strongly emarginate, notched or bilobed deep at apex, cuneate at base28
28. 002-002-001

<<Utricles>Seeds>Colour

dark reddish-brown or black, shining29
29. 006-004-003

<<Utricles>Seeds>Shape

lenticular30
30. 006-004-001

<<Utricles>Seeds>Width

0.8-1.2(1.6) mm wide31
31. 006-004-002

<Female flowers>Ovary

ovary ,32
32. 005-002

<Female flowers>Tepals

tepals , , ;33
33. 005-001

<Habit>Growth form

erect to semiprostrate34
34. 001-001

<Habit>Length

10 dm35
35. 001-002

<Habit>Stems

stems subsucculent, , .36
36. 001-003

<Inflorescences>Bracteoles

bracteoles .37
37. 003-004

<Inflorescences>Bracts

bracts ;38
38. 003-003

<Inflorescences>Length

to 9 cm long39
39. 003-002

<Inflorescences>Position

axillary clusters and simple terminal spikes40
40. 003-001

<Male flowers>Tepals

tepals , , , mucronate,41
41. 004-001

<Petiole>Blade

blade , , with prominent veins beneath.42
42. 002-002

<Petiole>Length

to 5 cm43
43. 002-001

<Utricles>Length

1.5-2.5 mm long44
44. 006-002

<Utricles>Seeds

seed , , .45
45. 006-004

<Utricles>Shape

ovoid-globose46
46. 006-001

<Utricles>Texture

smooth or somewhat rugulose47
47. 006-003

Common Name

Boni (French Guiana): mboia English (Suriname): klaroen, krakroen, kraroen, krassi-wiwiri, redi maka klaroen

Description

Annual, monoecious, erect to semiprostrate herb to 10 dm; stems subsucculent, glabrous, often pinkish to deep red. Petiole to 5 cm, shorter than to longer than blade; blade often rhomboid, sometimes ovate or elliptical, (0.7-)2-6(-7.5) x (0.2-)2.7-5 cm, usually strongly emarginate, notched or bilobed to 3 mm deep at apex, cuneate at base, glabrous, with prominent veins beneath. Inflorescence of axillary clusters and simple terminal spikesto 9 cm long; bracts linear, acuminate, aristate; bracteoles lanceolate, oblong or ovate, 1/2 to 1/3 as long as tepals, to 1 mm long, acute or obtuse. Male flowers developing far in advance of, and less numerous than female ones; tepals 3, hyaline, oblong, ovate or elliptical, 0.8-1.3 mm long, acute, mucronate, midvein green, incurved over (2)3 stamens. Female flowers more numerous than male; tepals 3, 2 are linear-oblong to somewhat spathulate, 0.9-2 mm long, about 1/2 to 2/3 the length of mature utricle, obtuse or subacute, third tepal shorter, scale-like; ovary oblong, styles (2-)3, erect. Utricle indehiscent, ovoid-globose, 1.5-2.5 mm long, smooth or somewhat rugulose, thin-walled; seed lenticular, 0.8-1.2(1.6) mm wide, dark reddish-brown or black, shining.

Distribution

Guianas present, Pantropical present
Pantropical; 24 collections studied, all from the Guianas (GU: 5; SU: 15; FG: 4).

Female flowers

Female flowers more numerous than male;48
48. 005

Habit

Annual, monoecious, herb to ;49
49. 001

Individuals Association

Guyana, Coast lands, Jenman 5337 Bourg de Maripasoula, Bassin du Maroni, Fleury 692 Suriname, Lower Corantijne R., Corantijnpolder near Nieuw Nickerie, Lanjouw 614 Route de Baduel, Ile de Cayenne, Hoff 5085 Suriname, Lower Saramacca R. near Plantation Catharina Sophia, Lanjouw 278 SaĆ¼l, Mori et al. 18658 Guyana, Georgetown, Promenade Gardens, Hitchcock 16591 Suriname, Matappica, near Fisheries Station, Jonker-Verhoef & Jonker 661

Inflorescences

Inflorescence of ;50
50. 003

Male flowers

Male flowers developing far in advance of, and less numerous than female ones;51
51. 004

Notes

Specimens having characteristics which are intermixed, intermediate or intergrading between those of typical A. blitum and A. viridis, e.g., features of the leaf-apex (bilobed vs. obtuse) and/or utricle surface (smooth vs. rugulose), are frequently encountered, suggesting hybridization and making definite identification to species difficult.

Petiole

Petiole , shorter than to longer than blade;52
52. 002

Utricles

Utricle indehiscent, , , , thin-walled;53
53. 006