Xyris lanulobractea

<<<<<Scapes>Spikes>Margins>Shape>Hairs>Colour

white1

1. 002-003-003-001-001-001

<<<<Habit>Leaves>Blade>Shape>Thickness

0.5-0.7 mm thick2

2. 001-004-006-001-001

<<<<Scapes>Spikes>Bracts>Empty bracts>Bract number

many3

3. 002-003-002-001-001

<<<<Scapes>Spikes>Bracts>Fertile bracts>Length

ca. 6 mm4

4. 002-003-002-002-002

<<<<Scapes>Spikes>Bracts>Fertile bracts>Shape

broadly elliptic to obovate5

5. 002-003-002-002-001

<<<<Scapes>Spikes>Margins>Shape>Hairs

-villosulous6

6. 002-003-003-001-001

<<<Capsules>Seeds>Shape>Colour

amber7

7. 004-004-002-002

<<<Capsules>Seeds>Shape>Length

1.1-1.3 mm8

8. 004-004-002-001

<<<Habit>Leaves>Blade>Shape

filiform, terete to oval in cross-section, , fluted9

9. 001-004-006-001

<<<Habit>Leaves>Ligula>Growth form

erect10

10. 001-004-005-001

<<<Habit>Leaves>Ligula>Length

to 3 mm11

11. 001-004-005-002

<<<Habit>Leaves>Sheaths>Shape

elongate, entire, ecarinate12

12. 001-004-003-001

<<<Scapes>Spikes>Bracts>Empty bracts

the empty ones , grading larger into the fertile ones13

13. 002-003-002-001

<<<Scapes>Spikes>Bracts>Fertile bracts

these ,14

14. 002-003-002-002

<<<Scapes>Spikes>Margins>Hairs

dorsal area red-brown15

15. 002-003-003-002

<<<Scapes>Spikes>Margins>Shape

broadly rounded, , back convex, ecarinate16

16. 002-003-003-001

<<<Scapes>Spikes>Shape>Colour

dull brown17

17. 002-003-001-002

<<<Scapes>Spikes>Shape>Length

0.7-1 (-1.5) cm18

18. 002-003-001-001

<<Capsules>Seeds>Seed number

few19

19. 004-004-001

<<Capsules>Seeds>Shape

cylindric or lance-ovoid, , , often angled20

20. 004-004-002

<<Capsules>Valves>Septa

eseptate21

21. 004-003-001

<<Habit>Leaves>Blade

blade .22

22. 001-004-006

<<Habit>Leaves>Colour

glossy red-brown23

23. 001-004-004

<<Habit>Leaves>Growth form

erect24

24. 001-004-001

<<Habit>Leaves>Length

20-40 cm25

25. 001-004-002

<<Habit>Leaves>Ligula

with ligule26

26. 001-004-005

<<Habit>Leaves>Sheaths

sheath27

27. 001-004-003

<<Lateral sepals>Anthers>Length

1 mm28

28. 003-004-001

<<Lateral sepals>Hairs>Colour

pale29

29. 003-001-001

<<Lateral sepals>Petals>Length

ca. 5 mm30

30. 003-002-002

<<Lateral sepals>Petals>Shape

broadly obovate to suborbicular31

31. 003-002-001

<<Lateral sepals>Staminodes>Shape

bearded32

32. 003-003-001

<<Scapes>Spikes>Bracts

bracts in a spiral, , ,33

33. 002-003-002

<<Scapes>Spikes>Margins

margins , , conspicuous.34

34. 002-003-003

<<Scapes>Spikes>Shape

broadly ovoid to obovoid, , , attenuate-based35

35. 002-003-001

<Capsules>Length

ca. 2 mm36

36. 004-001

<Capsules>Placentation

placentation basal37

37. 004-002

<Capsules>Seeds

seeds , .38

38. 004-004

<Capsules>Valves

valves ;39

39. 004-003

<Habit>Height

40-70 cm high40

40. 001-003

<Habit>Leaves

leaves , , , , ,41

41. 001-004

<Habit>Shape

slender42

42. 001-001

<Habit>Texture

hard-based, smooth43

43. 001-002

<Lateral sepals>Anthers

anthers .44

44. 003-004

<Lateral sepals>Hairs

ciliolate near base, upward -villous-fimbriate45

45. 003-001

<Lateral sepals>Petals

petals , ;46

46. 003-002

<Lateral sepals>Staminodes

staminodes ;47

47. 003-003

<Scapes>Shape

distally terete48

48. 002-001

<Scapes>Spikes

spikes ,49

49. 002-003

<Scapes>Thickness

ca. 1 mm thick50

50. 002-002

Capsules

Capsule , ,51

51. 004

Description

Rushlike, slender, cespitose, hard-based, smooth, perennial, 40-70 cm high; leaves erect, 20-40 cm, sheath elongate, entire, ecarinate, glossy red-brown, with erect ligule to 3 mm, blade filiform, terete to oval in cross-section, 0.5-0.7 mm thick, fluted. Scapes distally terete, ca. 1 mm thick; spikes broadly ovoid to obovoid, 0.7-1 (-1.5) cm, dull brown, attenuate-based, bracts in a spiral, the empty ones many, grading larger into the fertile ones, these broadly elliptic to obovate, ca. 6 mm, margins broadly rounded, white-villosulous, back convex, ecarinate, dorsal area red-brown, conspicuous. Lateral sepals free, equilateral, keel wide, curved, ciliolate near base, upward pale-villous-fimbriate; petals broadly obovate to suborbicular, ca. 5 mm; staminodes bearded; anthers 1 mm. Capsule ca. 2 mm, placentation basal, valves eseptate; seeds few, cylindric or lance-ovoid, 1.1-1.3 mm, amber, often angled.

Distribution

Gran Sabana present, S Bolivar present, SW Guyana present, Southern America: Venezuela (Venezuela present), contiguous Amazonian Brazil present

Gran Sabana of S Bolivar, Venezuela E to SW Guyana and contiguous Amazonian Brazil

Habit

Rushlike, , cespitose, , perennial, ;52

52. 001

Individuals Association

Guyana, Puente Kumerepa, by El Dorado-Sta. Elena Highway, Yuruani Ferry, Kral 72194 Guyana, Upper Mazaruni Dist., Makwaima Savanna near Mayoripai, Kako R, 8 Feb 1895, J. Renz 14145 Guyana, Venezuela: Bolivar: Cerro Auyantepui, F. Cardona 262 Guyana, Ilu-tepui, Gran Sabana, Maguire 33234 Guyana, 10 km SW of Chiguao, ca. 30 km SW of Canaima, O. Huber 12541 Guyana, ca. 17 km NE de Ikabaru, O. Huber et al. 6732

Lateral sepals

Lateral sepals free, equilateral, keel wide, curved, ;53

53. 003

Notes

This is very similar to X. globosa A. Nilsson, a common low-elevation savanna plant to the west and southwest, but more slender, narrower- leaved, with smaller, narrower spikes, bearded (rather than beardless staminodes and with broader petal blades.

Scapes

Scapes , ;54

54. 002

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