Buchenavia guianensis

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Buchenavia guianensis

Content

<<<Leaves>Veins>Secondary veins>Secondary vein pair number

8-20 pairs1
1. 002-007-002-001

<<Flowers>Lower hypanthium>Hairs

subglabrous to densely pubescent2
2. 004-002-002

<<Flowers>Lower hypanthium>Length

2-3.5 mm long3
3. 004-002-001

<<Flowers>Lower hypanthium>Neck

rather gradually narrowed to neck more than half the total length4
4. 004-002-003

<<Flowers>Upper hypanthium>Dimensions

1-1.5 x 2.5-3.3 mm5
5. 004-003-001

<<Flowers>Upper hypanthium>Hairs

glabrous6
6. 004-003-002

<<Fruits>Apex>Shape

rounded to subacute or shortly apiculate7
7. 005-004-001

<<Fruits>Base>Shape

rounded to obtuse8
8. 005-005-001

<<Fruits>Shape>Angle number

6-angled with 3 angles stronger than alternating 39
9. 005-003-001

<<Inflorescences>Peduncle>Hairs

pubescent, becoming glabrous in fruit10
10. 003-002-002

<<Inflorescences>Peduncle>Length

2-3 cm11
11. 003-002-001

<<Inflorescences>Rachises>Hairs

pubescent12
12. 003-003-002

<<Inflorescences>Rachises>Length

5-13 cm13
13. 003-003-001

<<Leaves>Apex>Shape

long- or short-acuminate or cuspidate to apiculate14
14. 002-004-001

<<Leaves>Base>Hairs

glabrous to very sparsely pubescent at maturity or sometimes more pubescent on major veins particularly below and on margin15
15. 002-005-002

<<Leaves>Base>Shape

narrowly cuneate and often decurrent16
16. 002-005-001

<<Leaves>Petiole>Hairs

glabrous17
17. 002-010-002

<<Leaves>Petiole>Length

(0.5-)2-7 cm long18
18. 002-010-001

<<Leaves>Veins>Intersecondary veins

intersecondary veins sometimes present,19
19. 002-007-003

<<Leaves>Veins>Midveins

midvein stout, very prominent,20
20. 002-007-001

<<Leaves>Veins>Secondary veins

secondary veins , moderately spaced to distant, arising at moderately to widely acute angles, curved or slightly so or only near base, prominent,21
21. 002-007-002

<<Leaves>Veins>Tertiary veins

tertiary veins rather weakly percurrent;22
22. 002-007-004

<Flowers>Length

3-5 mm long23
23. 004-001

<Flowers>Lower hypanthium

lower hypanthium , , ;24
24. 004-002

<Flowers>Upper hypanthium

upper hypanthium , .25
25. 004-003

<Fruits>Apex

apex ,26
26. 005-004

<Fruits>Base

base and without pseudostipe.27
27. 005-005

<Fruits>Dimensions

3-6.5 x 1.3-4 cm28
28. 005-002

<Fruits>Hairs

glabrous, dull and with rough rufous scurfy surface29
29. 005-001

<Fruits>Shape

oblong to oblong-elliptic in side view, subterete or30
30. 005-003

<Habit>Height

3-35(-?45) m31
31. 001-001

<Inflorescences>Length

7-16 cm long32
32. 003-001

<Inflorescences>Peduncle

peduncle , ;33
33. 003-002

<Inflorescences>Rachises

rhachis , .34
34. 003-003

<Leaves>Apex

apex ,35
35. 002-004

<Leaves>Areolation

areolation imperfect to well developed, usually prominent;36
36. 002-009

<Leaves>Base

base , ;37
37. 002-005

<Leaves>Dimensions

(6-)13-40(-?50) x (2-)4-9.5 cm38
38. 002-003

<Leaves>Domatia

domatia absent;39
39. 002-006

<Leaves>Higher order veins

higher order venation distinct;40
40. 002-008

<Leaves>Petiole

petiole , , usually eglandular.41
41. 002-010

<Leaves>Shape

oblanceolate to narrowly obovate-oblong42
42. 002-002

<Leaves>Texture

coriaceous43
43. 002-001

<Leaves>Veins

venation eucamptodromous,44
44. 002-007

Description

Tree 3-35(-?45) m, with short or no buttresses. Leaves coriaceous, oblanceolate to narrowly obovate-oblong, (6-)13-40(-?50) x (2-)4-9.5 cm, apex long- or short-acuminate or cuspidate to apiculate, base narrowly cuneate and often decurrent, glabrous to very sparsely pubescent at maturity or sometimes more pubescent on major veins particularly below and on margin; domatia absent; venation eucamptodromous, midvein stout, very prominent, secondary veins 8-20 pairs, moderately spaced to distant, arising at moderately to widely acute angles, curved or slightly so or only near base, prominent, intersecondary veins sometimes present, tertiary veins rather weakly percurrent; higher order venation distinct; areolation imperfect to well developed, usually prominent; petiole (0.5-)2-7 cm long, glabrous, usually eglandular. Inflorescence 7-16 cm long, spicate; peduncle 2-3 cm, pubescent, becoming glabrous in fruit; rhachis 5-13 cm, pubescent. Flowers 3-5 mm long; lower hypanthium 2-3.5 mm long, subglabrous to densely pubescent, rather gradually narrowed to neck more than half the total length; upper hypanthium 1-1.5 x 2.5-3.3 mm, glabrous. Fruit glabrous, dull and with rough rufous scurfy surface, 3-6.5 x 1.3-4 cm, oblong to oblong-elliptic in side view, subterete or 6-angled with 3 angles stronger than alternating 3, not or scarcely succulent, apex rounded to subacute or shortly apiculate, base rounded to obtuse and without pseudostipe.

Distribution

French Guiana present present, Southern America: Brazil North (Amapá present, Amazonas present, Pará present, Rondônia present)
French Guiana and Brazil (Amapá, Pará, Amazonas, Rondônia); apart from the type only 3 specimens have been seen from French Guiana (FG: 4).

Flowers

Flowers ;45
45. 004

Fruits

Fruit , , , not or scarcely succulent,46
46. 005

Habit

Tree , with short or no buttresses.47
47. 001

Individuals Association

Sabatier 2283 Poncy 1874 Station des Nouragues, basin of Arataye R., Sabatier & Prévost 2582

Inflorescences

Inflorescence , spicate;48
48. 003

Leaves

Leaves , , ,49
49. 002

Notes

Buchenavia guianensis is a most distinctive species in fruit, the scurfy non-succulent fruits are unique in the genus. The leaves, which dry a characteristic olive-green colour, also differ in several respects (thickness, colour, venation) from those of the other large-leaved sympatric species, B. macrophylla, B. reticulata and B. megalophylla, which are all species of inundated forest.

Phenology

Flowering ; fruiting .