Chelonanthus pterocaulis

Primary tabs

Chelonanthus pterocaulis

Content

<<<Flowers>Calyx>Apex>Shape

obtuse1
1. 005-002-005-001

<<<Flowers>Calyx>Lobes>Dimensions

3-5 x 3-5 mm2
2. 005-002-003-002

<<<Flowers>Calyx>Lobes>Shape

orbicular3
3. 005-002-003-001

<<<Flowers>Calyx>Margins>Texture

membranaceous4
4. 005-002-004-001

<<<Flowers>Corolla>Apex>Shape

obtuse5
5. 005-003-006-001

<<<Flowers>Corolla>Lobes>Dimensions

3-6 x 3-7 mm6
6. 005-003-005-002

<<<Flowers>Corolla>Lobes>Shape

ovate7
7. 005-003-005-001

<<<Flowers>Pistil>Ovary>Dimensions

5.7-6.6 x 2.2-4.3 mm8
8. 005-006-002-001

<<<Flowers>Pistil>Stigma lobes>Dimensions

2.5-5.1 x 1.8-2.0 mm9
9. 005-006-004-002

<<<Flowers>Pistil>Stigma lobes>Shape

ovate, obovate, oblong10
10. 005-006-004-001

<<<Flowers>Pistil>Style>Length

ca. 14 mm long11
11. 005-006-003-001

<<<Flowers>Stamens>Anthers>Colour

white12
12. 005-004-002-001

<<<Flowers>Stamens>Anthers>Length

1.6-3 mm long13
13. 005-004-002-003

<<<Flowers>Stamens>Anthers>Shape

elliptic to slightly ovate14
14. 005-004-002-002

<<<Flowers>Stamens>Filaments>Length

8-15 mm long15
15. 005-004-001-001

<<<Inflorescences>Bracts>Apex>Shape

acute16
16. 004-002-003-001

<<<Leaves>Blade>Apex>Shape

acute to obtuse17
17. 003-001-005-001

<<<Leaves>Blade>Base>Shape

cuneate or attenuate (often 2 most apical leaf pairs connate to fully perfoliate)18
18. 003-001-006-001

<<<Leaves>Blade>Margins>Shape

not thickened, flat19
19. 003-001-004-001

<<Flowers>Calyx>Apex

apex ;20
20. 005-002-005

<<Flowers>Calyx>Colour

green21
21. 005-002-001

<<Flowers>Calyx>Dimensions

6-10 x 4-7 mm22
22. 005-002-002

<<Flowers>Calyx>Lobes

lobes , ,23
23. 005-002-003

<<Flowers>Calyx>Margins

margin ,24
24. 005-002-004

<<Flowers>Corolla>Apex

apex ;25
25. 005-003-006

<<Flowers>Corolla>Colour

greenish white, cream, to pale yellow, with dark green spot on apex of each corolla lobe26
26. 005-003-001

<<Flowers>Corolla>Length

19-40 mm long27
27. 005-003-003

<<Flowers>Corolla>Lobes

lobes , ,28
28. 005-003-005

<<Flowers>Corolla>Shape

tubular to salver-shaped29
29. 005-003-002

<<Flowers>Corolla>Width

8-20 mm wide at mouth30
30. 005-003-004

<<Flowers>Pistil>Length

17-26 mm long31
31. 005-006-001

<<Flowers>Pistil>Ovary

ovary ,32
32. 005-006-002

<<Flowers>Pistil>Stigma lobes

stigma lobes , .33
33. 005-006-004

<<Flowers>Pistil>Style

style ,34
34. 005-006-003

<<Flowers>Stamens>Anthers

anthers , , , straight or curved after anthesis;35
35. 005-004-002

<<Flowers>Stamens>Filaments

filaments , straight,36
36. 005-004-001

<<Fruits>Seeds>Colour

brown37
37. 006-005-001

<<Fruits>Seeds>Diameter

0.1-0.4 mm in diam.38
38. 006-005-002

<<Inflorescences>Bracts>Apex

apex ;39
39. 004-002-003

<<Inflorescences>Bracts>Length

1.6-6.5 mm long40
40. 004-002-002

<<Inflorescences>Bracts>Shape

ovate41
41. 004-002-001

<<Inflorescences>Flower number per inflorescence>Flower number

2-33-flowered42
42. 004-001-001

<<Inflorescences>Pedicels>Length

2-7 mm long43
43. 004-003-001

<<Leaves>Blade>Apex

apex ,44
44. 003-001-005

<<Leaves>Blade>Base

base .45
45. 003-001-006

<<Leaves>Blade>Dimensions

1.3-13.8(-20.2) x 0.5-4.7(-8.5) cm46
46. 003-001-003

<<Leaves>Blade>Margins

margin ,47
47. 003-001-004

<<Leaves>Blade>Shape

ovate to elliptic, obovate48
48. 003-001-002

<<Leaves>Blade>Texture

membranaceous49
49. 003-001-001

<<Stems and branches>Internodes>Length

0.7-15 cm long50
50. 002-004-001

<<Stems and branches>Wings>Width

0.6-3.7 mm wide51
51. 002-003-001

<Flowers>Calyx

calyx , ,52
52. 005-002

<Flowers>Corolla

corolla , , , ,53
53. 005-003

<Flowers>Growth form

erect54
54. 005-001

<Flowers>Pistil

pistil ,55
55. 005-006

<Flowers>Pollen

pollen exine differentially reticulated;56
56. 005-005

<Flowers>Stamens

stamens not exserted, positioned deep within corolla tube,57
57. 005-004

<Fruits>Colour

brown58
58. 006-002

<Fruits>Dimensions

11-20 x 4-10 mm59
59. 006-004

<Fruits>Growth form

erect to horizontal60
60. 006-001

<Fruits>Seeds

seeds ,61
61. 006-005

<Fruits>Shape

ellipsoid62
62. 006-003

<Habit>Height

up to 1.5 m high63
63. 001-001

<Inflorescences>Bracts

bracts , ,64
64. 004-002

<Inflorescences>Pedicels

pedicel .65
65. 004-003

<Leaves>Blade

blade , , ,66
66. 003-001

<Stems and branches>Diameter

up to 0.6(-1) cm in diam.67
67. 002-001

<Stems and branches>Internodes

internodes .68
68. 002-004

<Stems and branches>Shape

quadrangular, winged69
69. 002-002

<Stems and branches>Wings

wings ;70
70. 002-003

Common Name

English (Guyana): wild tobacco

Description

Herb, up to 1.5 m high, unbranched to sparsley branched. Stems and branches up to 0.6(-1) cm in diam., quadrangular, winged, wings 0.6-3.7 mm wide; internodes 0.7-15 cm long. Leaves sessile, cauline evenly; blade membranaceous, ovate to elliptic, obovate, 1.3-13.8(-20.2) x 0.5-4.7(-8.5) cm, margin not thickened, flat, apex acute to obtuse, base cuneate or attenuate (often 2 most apical leaf pairs connate to fully perfoliate). Inflorescence 2-33-flowered; bracts ovate, 1.6-6.5 mm long, apex acute; pedicel 2-7 mm long. Flowers erect; calyx green, 6-10 x 4-7 mm, lobes orbicular, 3-5 x 3-5 mm, margin membranaceous, apex obtuse; corolla greenish white, cream, to pale yellow, with dark green spot on apex of each corolla lobe, tubular to salver-shaped, 19-40 mm long, 8-20 mm wide at mouth, lobes ovate, 3-6 x 3-7 mm, apex obtuse; stamens not exserted, positioned deep within corolla tube, filaments 8-15 mm long, straight, anthers white, elliptic to slightly ovate, 1.6-3 mm long, straight or curved after anthesis; pollen exine differentially reticulated; pistil 17-26 mm long, ovary 5.7-6.6 x 2.2-4.3 mm, style ca. 14 mm long, stigma lobes ovate, obovate, oblong, 2.5-5.1 x 1.8-2.0 mm. Fruit erect to horizontal, brown, ellipsoid, 11-20 x 4-10 mm; seeds brown, 0.1-0.4 mm in diam.

Diagnosis

Herba caule valde quadrangulato vel quadrialato, foliis sessilibus ovatis ellipticis obovatisve apice acutis vel obtusis, corolla viridi-alba vel pallide lutea hypocrateriformi cum structuris sexualibus in fauce profunde confertis post anthesin decidua, capsulis maturis horizontaliter patentibus vel erectis.

Distribution

Brazilian Amazon present, French Guiana present, Guianas present, Guyana present, Southern America: Colombia (Colombia present); Costa Rica (Costa Rica present); Venezuela (Venezuela present), Trinidad present
Costa Rica, Colombia, Venezuela and Trinidad, Guyana, French Guiana, Brazilian Amazon; 84 collections studied, of which 8 from the Guianas (GU: 7; FG: 1).

Flowers

Flowers ;71
71. 005

Fruits

Fruit , , , ;72
72. 006

Habit

Herb, , unbranched to sparsley branched.73
73. 001

Individuals Association

Verger IFAC, Région littorale, Sastre 6424 Guyana, Rupununi Distr., Manari, Maas & Westra 3759

Inflorescences

Inflorescence ;74
74. 004

Leaves

Leaves sessile, cauline evenly;75
75. 003

Notes

It is common for this species to have the 2 most apical leaf pairs slightly connate or truly perfoliate, while the rest of the leaf pairs are unfused.

Phenology

Flowering and fruiting .

Stems and branches

Stems and branches , ,76
76. 002

Uses

This species has been listed in Guyana for "for removing worms and 'dirt' in the body" (Riley 8).