Xyris cyperoides

Primary tabs

Xyris cyperoides

Content

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

41
1. 003-005-003-003-001

<<<<Scapes>Spikes>Bracts>Empty bracts>Relative dimensions

inner pair ca. as long as the 2 flowering bracts2
2. 003-005-003-003-002

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

23
3. 003-005-003-004-001

<<<<Scapes>Spikes>Bracts>Floral bracts>Length

ca. 3 mm4
4. 003-005-003-004-002

<<<Leaves>Blade>Shape>Width

0.2-0.4 mm wide5
5. 002-003-001-001

<<<Leaves>Sheaths>Ligula>Length

to 1.5 mm at apex6
6. 002-002-002-001

<<<Scapes>Spikes>Bracts>Bract pair number

37
7. 003-005-003-001

<<<Scapes>Spikes>Bracts>Empty bracts

empty ones ,8
8. 003-005-003-003

<<<Scapes>Spikes>Bracts>Floral bracts

these ,9
9. 003-005-003-004

<<<Scapes>Spikes>Bracts>Shape

lance-ovate to triangular-ovate10
10. 003-005-003-002

<<Capsules>Seeds>Colour

amber11
11. 005-003-003

<<Capsules>Seeds>Length

0.5 mm12
12. 005-003-002

<<Capsules>Seeds>Shape

broadly ellipsoid13
13. 005-003-001

<<Capsules>Valves>Placentation

placentation central14
14. 005-002-002

<<Capsules>Valves>Septa

eseptate15
15. 005-002-001

<<Lateral sepals>Anthers>Length

ca. 1.2 mm16
16. 004-004-001

<<Lateral sepals>Petals>Length

ca. 3 mm17
17. 004-002-002

<<Lateral sepals>Petals>Shape

obtriangular18
18. 004-002-001

<<Lateral sepals>Staminodes>Shape

bearded19
19. 004-003-001

<<Leaves>Blade>Shape

filiform, , somewhat flattened to terete or angulate20
20. 002-003-001

<<Leaves>Margins>Texture

scabridulous21
21. 002-004-001

<<Leaves>Sheaths>Colour

brown, shining22
22. 002-002-001

<<Leaves>Sheaths>Ligula

with ligule23
23. 002-002-002

<<Scapes>Spikes>Bracts

bracts decussate, in pairs, , , .24
24. 003-005-003

<<Scapes>Spikes>Length

ca. 4 mm25
25. 003-005-002

<<Scapes>Spikes>Shape

ellipsoid becoming turbinate26
26. 003-005-001

<Capsules>Length

ca. 2 mm27
27. 005-001

<Capsules>Seeds

seeds , , .28
28. 005-003

<Capsules>Valves

valves , ;29
29. 005-002

<Habit>Height

8-20 cm high30
30. 001-002

<Habit>Stems

stems mostly short31
31. 001-003

<Habit>Texture

smooth32
32. 001-001

<Lateral sepals>Anthers

anthers .33
33. 004-004

<Lateral sepals>Petals

petals , ;34
34. 004-002

<Lateral sepals>Shape

oblong, keel entire35
35. 004-001

<Lateral sepals>Staminodes

staminodes ;36
36. 004-003

<Leaves>Blade

blade ,37
37. 002-003

<Leaves>Growth form

erect or ascending38
38. 002-001

<Leaves>Margins

margins .39
39. 002-004

<Leaves>Sheaths

sheath , entire,40
40. 002-002

<Scapes>Ribs

with fine ribs41
41. 003-004

<Scapes>Scape number

1-several42
42. 003-003

<Scapes>Shape

filiform, terete43
43. 003-001

<Scapes>Spikes

spikes , ,44
44. 003-005

<Scapes>Thickness

0.3-0.4 mm thick45
45. 003-002

Capsules

Capsule ,46
46. 005

Description

Densely cespitose, smooth perennial 8-20 cm high, stems mostly short. Leaves erect or ascending, sheath brown, shining, entire, with ligule to 1.5 mm at apex, blade filiform, 0.2-0.4 mm wide, somewhat flattened to terete or angulate, margins scabridulous. Scapes filiform, terete, 0.3-0.4 mm thick, 1-severalwith fine ribs; spikes ellipsoid becoming turbinate, ca. 4 mm, bracts decussate, in 3 pairs, lance-ovate to triangular-ovate, empty ones 4, inner pair ca. as long as the 2 flowering bracts, these 2, ca. 3 mm. Lateral sepals free, subequilateral, oblong, keel entire; petals obtriangular, ca. 3 mm; staminodes bearded; anthers ca. 1.2 mm. Capsule ca. 2 mm, valves eseptate, placentation central; seeds broadly ellipsoid, 0.5 mm, amber.

Distribution

S Bolivar present, Southern America: Venezuela (Venezuela present), Suriname present, contiguous Brazil present
S Bolivar, Venezuela, E to Suriname and in contiguous Brazil

Habit

Densely cespitose, perennial , .47
47. 001

Individuals Association

Guyana, Kaieteur Plateau, Mure-mure Cr, Cowan & Soderstrom 2179 Suriname, Kappel-savanna S of Thfel- berg, Kramer & Hekking 3308

Lateral sepals

Lateral sepals free, subequilateral, ;48
48. 004

Leaves

Leaves , ,49
49. 002

Notes

This species strongly resembles X. guianensis in spike, but is definitely longer-leaved in relation to scape, and the lateral sepals are oblong with entire keel rather than lanciform with keel often scabrid or ciliolate.

Scapes

Scapes , , ;50
50. 003