Xyris savanensis

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Xyris savanensis

Content

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

3-5 mm1
1. 003-003-003-003-001-001

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

obovate to suborbicular, , rounded, entire, convex, ecarinate2
2. 003-003-003-003-001

<<<Capsules>Seeds>Shape>Length

0.4-0.5 mm3
3. 005-004-001-001

<<<Scapes>Spikes>Bracts>Colour

tan to red-brown, with narrow, green to maroon dorsal area4
4. 003-003-003-001

<<<Scapes>Spikes>Bracts>Empty bracts

empty bracts smaller than and grading upward into larger fertile ones5
5. 003-003-003-002

<<<Scapes>Spikes>Bracts>Fertile bracts

these6
6. 003-003-003-003

<<Capsules>Seeds>Colour

amber7
7. 005-004-002

<<Capsules>Seeds>Shape

ellipsoid or ovoid, , apically truncate, minutely apiculate8
8. 005-004-001

<<Capsules>Valves>Septa

eseptate9
9. 005-003-001

<<Lateral sepals>Anthers>Length

0.5 mm10
10. 004-005-001

<<Lateral sepals>Keel>Hairs

irregularly ciliate or ciliolate11
11. 004-002-001

<<Lateral sepals>Petals>Length

2-2.5 mm12
12. 004-003-002

<<Lateral sepals>Petals>Shape

broadly obovate13
13. 004-003-001

<<Lateral sepals>Staminodes>Shape

reduced, beardless14
14. 004-004-001

<<Leaves>Blade>Shape

flattened15
15. 002-003-001

<<Leaves>Blade>Texture

papillose-scabrid16
16. 002-003-003

<<Leaves>Blade>Width

1-5 mm wide17
17. 002-003-002

<<Leaves>Margins>Shape

papillose-scabrid18
18. 002-004-001

<<Leaves>Sheaths>Colour

red-brown to tan or brown19
19. 002-002-001

<<Leaves>Sheaths>Ligula

eligulate or with short ligule20
20. 002-002-003

<<Leaves>Sheaths>Texture

papillose-rugulose21
21. 002-002-002

<<Scapes>Shape>Thickness

distally 0.5-1 mm thick22
22. 003-001-001

<<Scapes>Spikes>Bracts

bracts many in a spiral, , , .23
23. 003-003-003

<<Scapes>Spikes>Length

0.3-0.7(-1) cm24
24. 003-003-002

<<Scapes>Spikes>Shape

ovoid to short-cylindric, ellipsoid or subglobose25
25. 003-003-001

<<Scapes>Surfaces>Texture

rugulose-papillose or scaberulous, rarely smooth26
26. 003-002-001

<Capsules>Length

1.5-2.5 mm27
27. 005-001

<Capsules>Placentation

placentation basal28
28. 005-002

<Capsules>Seeds

seeds , .29
29. 005-004

<Capsules>Valves

valves ;30
30. 005-003

<Habit>Height

10-50 cm high31
31. 001-001

<Habit>Stems

stems short32
32. 001-002

<Lateral sepals>Anthers

anthers .33
33. 004-005

<Lateral sepals>Keel

keel broad, thin,34
34. 004-002

<Lateral sepals>Length

ca. 3 mm35
35. 004-001

<Lateral sepals>Petals

petals , ;36
36. 004-003

<Lateral sepals>Staminodes

staminodes ;37
37. 004-004

<Leaves>Blade

blade , , ,38
38. 002-003

<Leaves>Growth form

erect or (mostly) in a fan39
39. 002-001

<Leaves>Margins

margins thin or slightly thickened, .40
40. 002-004

<Leaves>Sheaths

sheath entire, , ,41
41. 002-002

<Scapes>Shape

terete or subterete, , ecostate to tricostate or striate42
42. 003-001

<Scapes>Spikes

spikes , ,43
43. 003-003

<Scapes>Surfaces

surfaces44
44. 003-002

Capsules

Capsule , ,45
45. 005

Description

Soft-based annual, 10-50 cm high, stems short. Leaves erect or (mostly) in a fan, sheath entire, red-brown to tan or brown, papillose-rugulose, eligulate or with short ligule, blade flattened, 1-5 mm wide, papillose-scabrid, margins thin or slightly thickened, papillose-scabrid. Scapes terete or subterete, distally 0.5-1 mm thick, ecostate to tricostate or striate, surfaces rugulose-papillose or scaberulous, rarely smooth; spikes ovoid to short-cylindric, ellipsoid or subglobose, 0.3-0.7(-1) cm, bracts many in a spiral, tan to red-brown, with narrow, green to maroon dorsal area, empty bracts smaller than and grading upward into larger fertile ones, these obovate to suborbicular, 3-5 mm, rounded, entire, convex, ecarinate. Lateral sepals free, very inequilateral, broad, ca. 3 mm, strongly curved, keel broad, thin, irregularly ciliate or ciliolate; petals broadly obovate, 2-2.5 mm; staminodes reduced, beardless; anthers 0.5 mm. Capsule 1.5-2.5 mm, placentation basal, valves eseptate; seeds ellipsoid or ovoid, 0.4-0.5 mm, apically truncate, minutely apiculate, amber.

Distribution

Andean foothills E to coastal districts present, Argentina present, French Guiana, South America present
South America from the Andean foothills E to coastal districts, S into Argentina. French Guiana records are as yet unavailable, but it is highly likely that they will come.

Habit

Soft-based annual, , .46
46. 001

Individuals Association

Guyana, Rupununi Distr., Manari, Maas & Westra 3721 Suriname, Zanderij I, N of airport, Lanjouw & Lindeman 226 Suriname, Kuyper 91 Guyana, Kanuku Mts., Rupununi R., near Witaru Falls, Jan- sen-Jacobs et al. 58 Guyana, St. Francis, Mahaicony R., D.H. Davis 155 Suriname, Sipaliwini Savanna, 4 Gebroeders Mts., Oldenburger et al. 239

Lateral sepals

Lateral sepals free, very inequilateral, broad, , strongly curved, ;47
47. 004

Leaves

Leaves , ,48
48. 002

Notes

South of the Guianas in the Planalto of Brazil occur two other varieties. One, var. glabrata Seub. (Fl. Bras. 3(1): 217. 1855), differs only in that it is smooth and perhaps should be treated instead as a "forma". The other, var. procera (Malme) Malme (Ark. Bot. 13(3): 53. 1913), appears to be a short-lived perennial as well as being somewhat taller and more robust; again this as well should be considered a "forma".

Scapes

Scapes , ;49
49. 003