Polycarpaea corymbosa

Primary tabs

Polycarpaea corymbosa

Content

<<<Capsules>Seeds>Shape>Width

ca. 0.5 mm wide1
1. 005-003-002-001

<<<Sepals>Ovary>Style>Length

to 0.5 mm long2
2. 004-007-002-001

<<<Sepals>Ovary>Style>Sulcus number

3-sulcate at apex3
3. 004-007-002-002

<<<Sepals>Petals>Shape>Length

0.5-1 mm long4
4. 004-005-003-001

<<<Sepals>Stamens>Filaments>Length

0.5-1 mm long5
5. 004-006-002-002

<<<Sepals>Stamens>Filaments>Shape

flattened6
6. 004-006-002-001

<<Capsules>Seeds>Colour

pale brown7
7. 005-003-003

<<Capsules>Seeds>Seed number

2-68
8. 005-003-001

<<Capsules>Seeds>Shape

cochleate, , minutely corrugated9
9. 005-003-002

<<Habit>Stems>Growth form

erect10
10. 001-001-001

<<Habit>Stems>Hairs

flocculose-tomentose above11
11. 001-001-004

<<Habit>Stems>Height

5- ca. 30 cm tall12
12. 001-001-002

<<Habit>Stems>Shape

terete13
13. 001-001-003

<<Inflorescences>Pedicels>Hairs

puberulent14
14. 003-002-002

<<Inflorescences>Pedicels>Length

2-5 mm long15
15. 003-002-001

<<Leaves>Blade>Dimensions

3-15 x 0.2-0.3 mm16
16. 002-003-002

<<Leaves>Blade>Hairs

glabrous or sparsely pilose17
17. 002-003-003

<<Leaves>Blade>Shape

linear or linear-subulate18
18. 002-003-001

<<Leaves>Stipules>Colour

silvery-white19
19. 002-002-001

<<Leaves>Stipules>Length

2-5 mm long20
20. 002-002-003

<<Leaves>Stipules>Texture

scarious21
21. 002-002-002

<<Leaves>Whorls>Leaf number per node

up to ca. 15(-26)22
22. 002-001-001

<<Sepals>Ovary>Shape

ovoid-oblong23
23. 004-007-001

<<Sepals>Ovary>Style

style , .24
24. 004-007-002

<<Sepals>Petals>Colour

sordid-white25
25. 004-005-002

<<Sepals>Petals>Petal number

526
26. 004-005-001

<<Sepals>Petals>Shape

obovate or ovate-oblong, , obtuse or denticulate27
27. 004-005-003

<<Sepals>Shape>Length

2.5-3.5 mm long28
28. 004-003-001

<<Sepals>Stamens>Filaments

filaments , ;29
29. 004-006-002

<<Sepals>Stamens>Stamen number

530
30. 004-006-001

<Capsules>Length

1-2.5 mm long31
31. 005-002

<Capsules>Seeds

seeds , , .32
32. 005-003

<Capsules>Shape

ellipsoid or obovoid33
33. 005-001

<Habit>Stems

stems , , , often highly branched, .34
34. 001-001

<Inflorescences>Flower number

many-flowered35
35. 003-001

<Inflorescences>Pedicels

pedicels , .36
36. 003-002

<Leaves>Blade

blade , , long-aristate with a distinctly differentiated apical arista, , sometimes mucilaginous.37
37. 002-003

<Leaves>Stipules

stipules , , aristate, multilacerate, , persistent;38
38. 002-002

<Leaves>Whorls

whorls of leaves per node39
39. 002-001

<Sepals>Colour

silvery-white40
40. 004-002

<Sepals>Ovary

ovary obovoid or , shortly stipitate,41
41. 004-007

<Sepals>Petals

petals , , entire or slightly dentate, , much shorter than sepals;42
42. 004-005

<Sepals>Sepal number

usually 543
43. 004-001

<Sepals>Shape

lanceolate, , acute to aristate44
44. 004-003

<Sepals>Stamens

stamens ,45
45. 004-006

<Sepals>Texture

scarious46
46. 004-004

Capsules

Capsule , ;47
47. 005

Description

Annual, rarely perennial, herb; stems erect, 5- ca. 30 cm tall, terete, often highly branched, flocculose-tomentose above. Leaves in whorls of up to ca. 15(-26) leaves per node; stipules silvery-white, scarious, aristate, multilacerate, 2-5 mm long, persistent; blade linear or linear-subulate, 3-15 x 0.2-0.3 mm, long-aristate with a distinctly differentiated apical arista, glabrous or sparsely pilose, sometimes mucilaginous. Inflorescence a many-flowered, dichasial cyme; pedicels 2-5 mm long, puberulent. Sepals usually 5, silvery-white, lanceolate, 2.5-3.5 mm long, acute to aristate, scarious; petals 5, sordid-white, entire or slightly dentate, obovate or ovate-oblong, 0.5-1 mm long, obtuse or denticulate, much shorter than sepals; stamens 5, filaments flattened, 0.5-1 mm long; ovary obovoid or ovoid-oblong, shortly stipitate, style to 0.5 mm long, 3-sulcate at apex. Capsule ellipsoid or obovoid, 1-2.5 mm long; seeds 2-6, cochleate, ca. 0.5 mm wide, minutely corrugated, pale brown.

Distribution

Guianas present, Tropical and subtropical regions of the Old and New Worlds present
Tropical and subtropical regions of the Old and New Worlds; 23 collections studied, all from the Guianas (GU: 12; SU: 11).

Habit

Annual, rarely perennial, herb;48
48. 001

Individuals Association

Guyana, Vicinity of Karanambo, Maas et al. 7693 Suriname, Para Distr., Lobin Savanne, Teunissen et al. LBB 14521 Guyana, Rupununi Northern Savanna, 3 mi S of Meritiziero, Goodland 537 Guyana, Savanna near Oreala, Pulle 533 Suriname, Zanderij I, Archer 2837 Suriname, Tibiti Savanne, Lanjouw & Lindeman 1663

Inflorescences

Inflorescence a , dichasial cyme;49
49. 003

Leaves

Leaves in ;50
50. 002

Notes

Several specimens from Guyana and Suriname have been annotated as var. brasiliensis (Cambess.) Chodat & Hassl. by Olga Lakela; this variety, which occurs in Brazil and Paraguay, is said to be a perennial with woody napiform root and strongly revolute leaves, whereas typical P. corymbosa is an annual with fibrous roots from a slender main root and flat or slightly revolute leaves. All specimens seen for this treatment conform to typical P. corymbosa. For a brief discussion of variation in this species, see Lakela (1962).

Sepals

Sepals , , , ;51
51. 004