Xyris roraimae

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Xyris roraimae

Content

<<<<Scapes>Bracts>Floral bracts>Shape>Length

5-7 mm1
1. 003-005-002-001-001

<<<<Scapes>Spikes>Bracts>Margins>Colour

reddish2
2. 003-004-004-002-001

<<<<Scapes>Spikes>Bracts>Margins>Hairs

scario-lacerate3
3. 003-004-004-002-002

<<<Leaves>Margins>Hairs>Colour

pale4
4. 002-005-001-001

<<<Leaves>Sheaths>Ligula>Length

less than 0.5 mm5
5. 002-003-004-001

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

several6
6. 003-005-001-001

<<<Scapes>Bracts>Floral bracts>Shape

broadly obovate to suborbicular, , ecarinate7
7. 003-005-002-001

<<<Scapes>Ribs>Hairs>Colour

pale8
8. 003-003-003-001

<<<Scapes>Spikes>Bracts>Bract number

numerous9
9. 003-004-004-001

<<<Scapes>Spikes>Bracts>Margins

with narrow but distinctive, , margins10
10. 003-004-004-002

<<Capsules>Seeds>Colour

amber11
11. 005-004-003

<<Capsules>Seeds>Length

ca. 1 mm12
12. 005-004-002

<<Capsules>Seeds>Shape

ellipsoid-cylindric13
13. 005-004-001

<<Capsules>Valves>Septa

eseptate14
14. 005-003-001

<<Habit>Foliage>Texture

papillose-rugulose15
15. 001-004-001

<<Lateral sepals>Anthers>Length

2 mm long16
16. 004-005-001

<<Lateral sepals>Keel>Hairs

lacero-fimbriate or ciliate from about middle to tip17
17. 004-002-001

<<Lateral sepals>Petals>Length

ca. 5 mm18
18. 004-003-002

<<Lateral sepals>Petals>Shape

obovate19
19. 004-003-001

<<Lateral sepals>Staminodes>Shape

bearded20
20. 004-004-001

<<Leaves>Blade>Shape

flattened21
21. 002-004-001

<<Leaves>Blade>Width

3-5 mm wide22
22. 002-004-002

<<Leaves>Margins>Hairs

-ciliate23
23. 002-005-001

<<Leaves>Margins>Texture

tuberculate24
24. 002-005-002

<<Leaves>Sheaths>Colour

there castaneous25
25. 002-003-002

<<Leaves>Sheaths>Hairs

ciliate26
26. 002-003-003

<<Leaves>Sheaths>Ligula

eligulate or with short () ligule27
27. 002-003-004

<<Leaves>Sheaths>Shape

abruptly dilated28
28. 002-003-001

<<Scapes>Bracts>Empty bracts

empty bracts , grading larger into the flowering ones29
29. 003-005-001

<<Scapes>Bracts>Floral bracts

these30
30. 003-005-002

<<Scapes>Ribs>Hairs

-ciliate edges31
31. 003-003-003

<<Scapes>Ribs>Rib number

232
32. 003-003-001

<<Scapes>Ribs>Shape

flat33
33. 003-003-002

<<Scapes>Spikes>Bracts

bracts in a spiral, lacking dorsal area and ;34
34. 003-004-004

<<Scapes>Spikes>Colour

pale red-brown or yellow-tan35
35. 003-004-003

<<Scapes>Spikes>Length

1-3 cm36
36. 003-004-002

<<Scapes>Spikes>Shape

broadly ovoid, ellipsoid or cylindric37
37. 003-004-001

<Capsules>Length

2.5-3 mm38
38. 005-001

<Capsules>Placentation

placentation basal39
39. 005-002

<Capsules>Seeds

seeds , , .40
40. 005-004

<Capsules>Valves

valves ;41
41. 005-003

<Habit>Colour

whole plant with yellowish tints42
42. 001-003

<Habit>Foliage

foliage including scapes43
43. 001-004

<Habit>Height

to 100 cm high or more44
44. 001-001

<Habit>Stems

stem short45
45. 001-002

<Lateral sepals>Anthers

anthers .46
46. 004-005

<Lateral sepals>Keel

keel broad,47
47. 004-002

<Lateral sepals>Length

5.5-6.5 mm48
48. 004-001

<Lateral sepals>Petals

petals , ;49
49. 004-003

<Lateral sepals>Staminodes

staminodes ;50
50. 004-004

<Leaves>Blade

blade , ,51
51. 002-004

<Leaves>Growth form

erect or ascending52
52. 002-001

<Leaves>Length

20-40 cm53
53. 002-002

<Leaves>Margins

margins and .54
54. 002-005

<Leaves>Sheaths

sheath , , ,55
55. 002-003

<Scapes>Bracts

, .56
56. 003-005

<Scapes>Ribs

ribs making57
57. 003-003

<Scapes>Shape

distally flattened58
58. 003-001

<Scapes>Spikes

spikes , , ,59
59. 003-004

<Scapes>Width

2-3 mm wide60
60. 003-002

Capsules

Capsule , ,61
61. 005

Description

Tall, often solitary or in small tufts, brittle perennial, to 100 cm high or more, stem short, whole plant with yellowish tints, foliage including scapes papillose-rugulose. Leaves erect or ascending, 20-40 cm, sheath abruptly dilated, there castaneous, ciliate, eligulate or with short (less than 0.5 mm) ligule, blade flattened, 3-5 mm wide, margins pale-ciliate and tuberculate. Scapes distally flattened, 2-3 mm wide, 2flat ribs making pale-ciliate edges; spikes broadly ovoid, ellipsoid or cylindric, 1-3 cm, pale red-brown or yellow-tan, bracts numerous in a spiral, lacking dorsal area and with narrow but distinctive, reddish, scario-lacerate margins; empty bracts several, grading larger into the flowering ones, these broadly obovate to suborbicular, 5-7 mm, ecarinate. Lateral sepals free, very inequilateral, curved, 5.5-6.5 mm, keel broad, lacero-fimbriate or ciliate from about middle to tip; petals obovate, ca. 5 mm; staminodes bearded; anthers 2 mm long. Capsule 2.5-3 mm, placentation basal, valves eseptate; seeds ellipsoid-cylindric, ca. 1 mm, amber.

Distribution

Brazilian Planalto present, SE and SC Bolivar present, SW Guyana present, Southern America: Brazil Northeast (Bahia present); Brazil Southeast (Minas Gerais present); Brazil West-Central (Goiás present); Venezuela (Venezuela present), contiguous Amazonian Brazil present
SE and SC Bolivar, Venezuela E into SW Guyana and in contiguous Amazonian Brazil, disjunct in the Brazilian Planalto (Bahia, Goias, Minas Gerais).

Habit

Tall, often solitary or in small tufts, brittle perennial, , , , .62
62. 001

Individuals Association

16 km from Kavanayen, Steyermark 121052 Bolivar: 2 km E Kavanayen, Kral 72089 Guyana, Mt. Roraima, Kral

Lateral sepals

Lateral sepals free, very inequilateral, curved, , ;63
63. 004

Leaves

Leaves , , ,64
64. 002

Notes

This species is one of the rare examples of montane Xyris with a bicentric distribution in South America, numerous populations of it recently found in central Brazil.

Scapes

Scapes , , ;65
65. 003