Euplassa

Primary tabs

Euplassa

<<<Flowers>Stamens>Anthers>Shape

ovate1
1. 004-002-001-001

<<Flowers>Glands>Gland number

42
2. 004-003-001

<<Flowers>Glands>Texture

fleshy3
3. 004-003-002

<<Flowers>Ovary>Hairs

glabrous to densely pubescent4
4. 004-004-001

<<Flowers>Ovary>Ovule number

25
5. 004-004-002

<<Flowers>Ovary>Position

pendulous6
6. 004-004-003

<<Flowers>Ovary>Stigma

stigma latero-apical.7
7. 004-004-005

<<Flowers>Ovary>Style

style curved,8
8. 004-004-004

<<Flowers>Stamens>Anthers

anthers , subsessile, housed in concave distal end of tepals;9
9. 004-002-001

<<Flowers>Tepals>Growth form

all recurving at anthesis or one (innermost) remaining erect10
10. 004-001-001

<<Fruits>Inner mesocarp>Texture

thin and woody or very thick and sclerous11
11. 005-004-001

<<Fruits>Outer mesocarp>Texture

thin and coriaceous or thick and fleshy12
12. 005-003-001

<<Fruits>Seeds>Texture

fleshy13
13. 005-005-001

<<Leaves>Leaflets>Basal pair

basal pair consistently smaller than rest14
14. 002-002-003

<<Leaves>Leaflets>Leaflet pair number

2-10 pairs15
15. 002-002-001

<<Leaves>Leaflets>Shape

shape various16
16. 002-002-002

<<Leaves>Margins>Margin type

entire to remotely serrate17
17. 002-003-001

<<Leaves>Rachises>Relative distance

extending up to 2 cm beyond terminal leaflet pair18
18. 002-001-001

<Flowers>Glands

hypogynous glands , , distinct, lobed or fused to form a quadrangular structure (or nectary disk);19
19. 004-003

<Flowers>Ovary

ovary subsessile, , with , orthotropous ovules,20
20. 004-004

<Flowers>Stamens

stamens epitepalous,21
21. 004-002

<Flowers>Tepals

tepals ;22
22. 004-001

<Fruits>Inner mesocarp

inner mesocarp ;23
23. 005-004

<Fruits>Outer mesocarp

outer mesocarp ;24
24. 005-003

<Fruits>Seed number

1-2-seeded25
25. 005-001

<Fruits>Seeds

seeds , more or less compressed, not winged.26
26. 005-005

<Fruits>Shape

subglobose to ovoid27
27. 005-002

<Inflorescences>Bracts

each pair subtended by a small common bract;28
28. 003-004

<Inflorescences>Flowers

flowers in pairs, each pair supported by a peduncle of variable length which is frequently altogether absent;29 flowers sessile or pedicellate.30
29. 003-003, 30. 003-005

<Inflorescences>Inflorescence number per axil

solitary, occasionally with 231
31. 003-002

<Inflorescences>Position

axillary or rarely terminal32
32. 003-001

<Leaves>Leaflets

leaflets , opposite to strongly subopposite, subsessile to long-petiolate, , ;33
33. 002-002

<Leaves>Margins

margin .34
34. 002-003

<Leaves>Rachises

rhachis frequently ending in a terminal appendix , rarely forming a terminal leaflet35
35. 002-001

Description

Trees, less frequently shrubs. Leaves spirally arranged, paripinnate, rhachis frequently ending in a terminal appendix extending up to 2 cm beyond terminal leaflet pair, rarely forming a terminal leaflet; leaflets 2-10 pairs, opposite to strongly subopposite, subsessile to long-petiolate, shape various, basal pair consistently smaller than rest; margin entire to remotely serrate. Inflorescences generally unbranched, pseudo-racemose, axillary or rarely terminal, solitary, occasionally with 2 inflorescences per leaf axil; flowers in pairs, each pair supported by a peduncle of variable length which is frequently altogether absent; each pair subtended by a small common bract; flowers sessile or pedicellate. Flowers weakly zygomorphic; tepals all recurving at anthesis or one (innermost) remaining erect; stamens epitepalous, anthers ovate, subsessile, housed in concave distal end of tepals; hypogynous glands 4, fleshy, distinct, lobed or fused to form a quadrangular structure (or nectary disk); ovary subsessile, glabrous to densely pubescent, with 2pendulous, orthotropous ovules, style curved, stigma latero-apical. Fruit a nut or rarely a drupe, indehiscent, 1-2-seeded, subglobose to ovoid; outer mesocarp thin and coriaceous or thick and fleshy; inner mesocarp thin and woody or very thick and sclerous; seeds fleshy, more or less compressed, not winged.

Distribution

Bolivar endemic, E Brazil endemic, Guianas endemic, Neotropics endemic, SE Brazil endemic, Southern America: Bolivia (Bolivia endemic); Brazil South (Paraná endemic); Brazil Southeast (Minas Gerais endemic); Venezuela (Venezuela endemic), central Colombia endemic, tropical S America endemic
Endemic to tropical S America, ranging from Venezuela (Bolívar) and central Colombia, to SE Brazil and Bolivia, the center of distribution is in SE Brazil from Minas Gerais to Paraná; 20 species in the Neotropics of which 2 species are known to occur in the Guianas.

Etymology

The name Euplassa refers to the leaves resembling those of many Leguminosae.

Flowers

Flowers weakly zygomorphic;36
36. 004

Fruits

Fruit a nut or rarely a drupe, indehiscent, , ;37
37. 005

Habit

Trees, less frequently shrubs.38
38. 001

Individuals Association

BAFOG 1207 Suriname, Lindeman 7607 Suriname, Lanjouw & Lindeman 2759 BAFOG 1266

Inflorescences

Inflorescences generally unbranched, pseudo-racemose, , inflorescences per leaf axil;39
39. 003

Leaves

Leaves spirally arranged, paripinnate, ;40
40. 002

Notes

Euplassa is also described as having bordered pits on the fibres (Détienne & Jacquet 1983). Fibre pits are also noted on tangential walls equal in abundance to those on the radial walls (Mennega 1966).

Wood

Growth rings indistinct or absent.
Vessels diffuse, solitary, paired or in groups of 3-4, rarely more, which tend to be tangentially arranged and occasionally appear as tangential bands; 3-14 (9) per mm2, circular 45-258 (148) μm wide. Perforation plates simple. Intervessel pits alternate and usually bordered. Vessel-ray pits alternate.
Rays uniseriate and multseriate (5-22 cells wide), 1-2 per mm. Uniseriate rays composed of square to upright cells and 1-2 cells in height. Multiseriate rays composed of predominantly procumbent body cells and 1-3 (extremely rarely up to 5) rows of upright and/or square marginal cells. Multiseriate rays 78-1100 (540) μm wide and over 1 mm in height, sometimes appearing as an aggregate, dissected by axial elements. Nested sclerotic ray parenchyma cells () can be present in the multiseriate rays along with amorphous (non crystalline) deposits.
Axial parenchyma present in narrow tangential bands 1-2 cells wide and 4-8 per mm, with 2 to many cells per strand. Ground tissue of non septate fibres with thin to thick walls and rare simple to minutely bordered pits on the radial walls.