Xyris albescens

Primary tabs

Xyris albescens

Content

<<<<Scapes>Spikes>Floral bracts>Shape>Length

6-9 mm1
1. 003-004-006-001-001

<<<Capsules>Seeds>Scales>Length

0.5-0.7 mm2
2. 005-003-003-002

<<<Capsules>Seeds>Scales>Position

terminal3
3. 005-003-003-001

<<<Lateral sepals>Staminodes>Anthers>Length

ca. 2.5 mm4
4. 004-005-002-001

<<<Leaves>Margins>Hairs>Colour

white5
5. 002-006-001-001

<<<Scapes>Margins>Hairs>Colour

white6
6. 003-003-001-001

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

many7
7. 003-004-005-001

<<<Scapes>Spikes>Floral bracts>Shape

narrowly ovate to oblong, , rounded, entire, often cucullate, convex, dorsal area mostly absent8
8. 003-004-006-001

<<Capsules>Seeds>Length

2-3 mm9
9. 005-003-002

<<Capsules>Seeds>Scales

including scale of10
10. 005-003-003

<<Capsules>Seeds>Shape

fusiform-cylindric11
11. 005-003-001

<<Capsules>Valves>Placentation

placentation axile12
12. 005-002-002

<<Capsules>Valves>Septa

septate at base13
13. 005-002-001

<<Lateral sepals>Keel>Hairs

scabro-ciliate to villosulous14
14. 004-003-001

<<Lateral sepals>Petals>Length

6-7 mm15
15. 004-004-002

<<Lateral sepals>Petals>Shape

narrowly obovate16
16. 004-004-001

<<Lateral sepals>Staminodes>Anthers

anthers .17
17. 004-005-002

<<Lateral sepals>Staminodes>Shape

bearded18
18. 004-005-001

<<Leaves>Blade>Shape

flattened19
19. 002-005-001

<<Leaves>Blade>Width

(3-)5-6 mm wide20
20. 002-005-002

<<Leaves>Margins>Hairs

densely -ciliate21
21. 002-006-001

<<Leaves>Sheaths>Colour

castaneous to red-brown, lustrous22
22. 002-004-001

<<Scapes>Margins>Hairs

-ciliate23
23. 003-003-001

<<Scapes>Spikes>Colour

lustrous brown24
24. 003-004-003

<<Scapes>Spikes>Empty bracts

empty bracts25
25. 003-004-005

<<Scapes>Spikes>Floral bracts

flower bracts larger,26
26. 003-004-006

<<Scapes>Spikes>Flower number

many-flowered27
27. 003-004-004

<<Scapes>Spikes>Length

(1-)1.5 cm28
28. 003-004-002

<<Scapes>Spikes>Shape

broadly ovoid, globose or hemispheric29
29. 003-004-001

<Capsules>Length

ca. 5 mm30
30. 005-001

<Capsules>Seeds

seeds , , .31
31. 005-003

<Capsules>Valves

valves , ;32
32. 005-002

<Habit>Height

40-100 cm high33
33. 001-001

<Habit>Stems

stems short34
34. 001-002

<Lateral sepals>Keel

keel35
35. 004-003

<Lateral sepals>Length

6-7 mm36
36. 004-001

<Lateral sepals>Petals

petals , ;37
37. 004-004

<Lateral sepals>Shape

acute38
38. 004-002

<Lateral sepals>Staminodes

staminodes ,39
39. 004-005

<Leaves>Blade

blade , ,40
40. 002-005

<Leaves>Growth form

spreading-ascending in a narrow fan41
41. 002-001

<Leaves>Length

20-60 cm42
42. 002-003

<Leaves>Margins

margin .43
43. 002-006

<Leaves>Shape

elongate-linear44
44. 002-002

<Leaves>Sheaths

sheath at least 1/2 as long as blade, , entire45
45. 002-004

<Scapes>Margins

margins ;46
46. 003-003

<Scapes>Shape

distally somewhat flattened47
47. 003-001

<Scapes>Spikes

spikes , , blunt, , , , .48
48. 003-004

<Scapes>Width

(2-)2.5-3 mm wide49
49. 003-002

Capsules

Capsule ,50
50. 005

Description

Cespitose perennial, 40-100 cm high, stems short. Leaves spreading-ascending in a narrow fan, elongate-linear, 20-60 cm, sheath at least 1/2 as long as blade, castaneous to red-brown, lustrous, entire, blade flattened, (3-)5-6 mm wide, margin densely white-ciliate. Scape distally somewhat flattened, (2-)2.5-3 mm wide, margins white-ciliate; spikes broadly ovoid, globose or hemispheric, (1-)1.5 cm, blunt, lustrous brown, many-flowered, empty bracts many, flower bracts larger, narrowly ovate to oblong, 6-9 mm, rounded, entire, often cucullate, convex, dorsal area mostly absent. Lateral sepals equilateral, narrow, 6-7 mm, acute, keel scabro-ciliate to villosulous; petals narrowly obovate, 6-7 mm; staminodes bearded, anthers ca. 2.5 mm. Capsule ca. 5 mm, valves septate at base, placentation axile; seeds fusiform-cylindric, 2-3 mm, including terminal scale of 0.5-0.7 mm.

Distribution

Bolivar present, E to W Guyana present, Southern America: Brazil North (Amazonas present); Venezuela (Venezuela present)
Amazonas E through Bolivar, Venezuela, E to W Guyana

Habit

Cespitose perennial, , .51
51. 001

Individuals Association

top of Mt. Roraima, Delascio & Brewer-Carias 4802 Guyana, Upper Mazaruni District, N slope of Mt. Roraima, J. Renz 14266 Mt. Roraima, escarpment, R. Per- saud 149

Lateral sepals

Lateral sepals equilateral, narrow, , , ;52
52. 004

Leaves

Leaves , , , ,53
53. 002

Scapes

Scape , ,54
54. 003