Portulaca sedifolia

<<<<Habit>Stems>Nodes>Hairs>Colour

whitish1

1. 001-001-003-001-001

<<<Habit>Stems>Nodes>Hairs

with tufts of long, hairs as long as or longer than the leaves2

2. 001-001-003-001

<<<Inflorescences>Involucres>Shape>Length

ca. 1.5 mm long3

3. 003-004-002-001

<<<Leaves>Blade>Shape>Dimensions

3-6 x 1-1.5 mm4

4. 002-002-001-001

<<Fruits>Operculum>Colour

brownish-yellow, shining5

5. 005-003-001

<<Fruits>Seeds>Colour

black, slate-grey or greyish-black6

6. 005-004-003

<<Fruits>Seeds>Length

0.5-0.65 mm7

7. 005-004-002

<<Fruits>Seeds>Shape

cochleate-orbicular8

8. 005-004-001

<<Habit>Stems>Colour

purplish or reddish9

9. 001-001-002

<<Habit>Stems>Length

4-10 cm long10

10. 001-001-001

<<Habit>Stems>Nodes

nodes .11

11. 001-001-003

<<Inflorescences>Involucres>Leaf number

5-612

12. 003-004-001

<<Inflorescences>Involucres>Shape

broadly ovate, , concave13

13. 003-004-002

<<Leaves>Blade>Colour

purplish or reddish14

14. 002-002-003

<<Leaves>Blade>Hairs

glabrous15

15. 002-002-002

<<Leaves>Blade>Shape

elliptic-oblong, linear-oblong or linear-lanceolate, , acute or obtuse16

16. 002-002-001

<<Leaves>Blade>Texture

often papillose or with a corrugated surface17

17. 002-002-004

<<Sepals>Petals>Colour

white or whitish-rose, sometimes yellowish-white or pink18

18. 004-002-001

<<Sepals>Shape>Length

1.5-3 mm long19

19. 004-001-001

<<Sepals>Stamens>Stamen number

5-1520

20. 004-003-001

<<Sepals>Style>Length

1 mm long21

21. 004-004-001

<<Sepals>Style>Style-branch number

2-522

22. 004-004-002

<Fruits>Length

2-3.5 mm23

23. 005-002

<Fruits>Operculum

operculum24

24. 005-003

<Fruits>Seeds

seeds , , , tuberculate.25

25. 005-004

<Fruits>Shape

ovoid26

26. 005-001

<Habit>Stems

stems prostrate or ascending, branched from base, , ,27

27. 001-001

<Inflorescences>Flower number

solitary28

28. 003-002

<Inflorescences>Flower number per cluster

few-flowered29

29. 003-003

<Inflorescences>Involucres

by involucral leaves30

30. 003-004

<Inflorescences>Position

terminal31

31. 003-001

<Leaves>Blade

blade flat, , , , .32

32. 002-002

<Leaves>Petiole

shortly petiolate;33

33. 002-001

<Sepals>Petals

petals ;34

34. 004-002

<Sepals>Shape

deltate or ovate-triangular, , obtuse35

35. 004-001

<Sepals>Stamens

stamens ;36

36. 004-003

<Sepals>Style

style , style-branches .37

37. 004-004

Description

Annual subshrub or herb; stems prostrate or ascending, branched from base, 4-10 cm long, purplish or reddish, nodes with tufts of long, whitish hairs as long as or longer than the leaves. Leaves alternate, succulent; shortly petiolate; blade flat, elliptic-oblong, linear-oblong or linear-lanceolate, 3-6 x 1-1.5 mm, acute or obtuse, glabrous, purplish or reddish, often papillose or with a corrugated surface. Inflorescence a terminal, solitary flower or few-flowered cluster subtended by 5-6broadly ovate, ca. 1.5 mm long, concave involucral leaves. Sepals deltate or ovate-triangular, 1.5-3 mm long, obtuse, not keeled; petals white or whitish-rose, sometimes yellowish-white or pink; stamens 5-15; style 1 mm long, style-branches 2-5. Fruit ovoid, 2-3.5 mm, circumscissile below middle, operculum brownish-yellow, shining; seeds cochleate-orbicular, 0.5-0.65 mm, black, slate-grey or greyish-black, tuberculate.

Distribution

Guianas present, Southern America: Venezuela (Venezuela present), northern Brazil present

Northern Brazil, Venezuela, and the Guianas; 21 collections studied, all from the Guianas (GU: 5; SU: 1; FG: 15).

Fruits

Fruit , , circumscissile below middle, ;38

38. 005

Habit

Annual subshrub or herb;39

39. 001

Individuals Association

Pripris Maillard, 4 km SE de Tonate, Raynal-Roques 20042 Haut Tampoc, Saut Pier Kourou, Cremers 4642 Guyana, Rupununi Distr., Shea Rock, Jansen-Jacobs et al. 3671 Guyana, U. Takutu-U. Essequibo Region, Rupununi Savanna, Towatawan Mt., 11 km E of Dadanawa, Gillespie 1976 Suriname, Islands in rapids between Grasi Falls and Posoegronoe, Maguire 23996 Guyana, Rupununi Distr., Dadanawa, Tawatawun Mt., Jansen-Jacobs et al. 3979 Region de la Haute Crique Armontabo, bas Oyapock, de Granville 4339 Guyana, Rupununi Distr., Shea Rock, Jansen-Jacobs et al. 4806

Inflorescences

Inflorescence a , flower or cluster subtended .40

40. 003

Leaves

Leaves alternate, succulent;41

41. 002

Notes

Individual plants sometimes have dimorphic leaves, with some of the upper branches bearing flat leaves and some of the lower branches having prominently ellipsoid-, ovoid-, or subgloboid-inflated, 2-2.5 mm long, leaves.

Sepals

Sepals , not keeled;42

42. 004

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