Laportea

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Laportea

Content

<<Leaves>Stipules>Shape

connate1
1. 002-001-001

<<Pistillate flowers>Stigma>Shape

tongue-shaped2
2. 005-002-001

<<Pistillate flowers>Tepals>Shape

basally connate3
3. 005-001-002

<<Pistillate flowers>Tepals>Tepal number

44
4. 005-001-001

<<Staminate flowers>Stamens>Stamen number

(4 or) 55
5. 004-002-001

<<Staminate flowers>Tepals>Shape

connate6
6. 004-001-002

<<Staminate flowers>Tepals>Tepal number

(4 or) 57
7. 004-001-001

<Akenes>Perianth

not enclosed by the perianth8
8. 006-001

<Habit>Hairs

with stinging and/or glandular hairs9
9. 001-001

<Inflorescences>Shape

± paniculate10
10. 003-001

<Leaves>Blade

blade pinnately veined.11
11. 002-002

<Leaves>Stipules

stipules ;12
12. 002-001

<Pistillate flowers>Stigma

stigma , persistent on the hooked apex of the fruit.13
13. 005-002

<Pistillate flowers>Tepals

tepals , unequal, ;14
14. 005-001

<Staminate flowers>Stamens

stamens .15
15. 004-002

<Staminate flowers>Tepals

tepals , ;16
16. 004-001

Akenes

Achene .17
17. 006

Description

Herbs, monoecious, with stinging and/or glandular hairs. Leaves spirally arranged to distichous; stipules connate; blade pinnately veined. Inflorescences bisexual, ± paniculate, with the flowers in loose glomerules. Staminate flowers: tepals (4 or) 5, connate; stamens (4 or) 5. Pistillate flowers: tepals 4, unequal, basally connate; stigma tongue-shaped, persistent on the hooked apex of the fruit. Achene not enclosed by the perianth.

Distribution

Guianas present, Neotropics present, Pantropical present
Pantropical, 23 species; in the Neotropics 3 species, one of them in the Guianas.

Habit

Herbs, monoecious, .18
18. 001

Inflorescences

Inflorescences bisexual, , with the flowers in loose glomerules.19
19. 003

Leaves

Leaves spirally arranged to distichous;20
20. 002

Notes

No material available from the Guianas. Based on Bonsen & ter Welle (1984).

Pistillate flowers

Pistillate flowers:21
21. 005

Staminate flowers

Staminate flowers:22
22. 004

Wood

Growth rings faint or absent. Vessels diffuse, solitary and in radial multiples and irregular clusters of 2-4, round to oval, 2-10 per sq. mm, diameter 120-270 μm. Vessel-member length: 300-460 μm. Perforations simple. Intervascular pits alternate, round or polygonal, 9-15 μm. Vessel- ray and vessel-parenchyma pits as the intervascular pits. Thin-walled tyloses present or absent.
Rays multiseriate, 3-10 cells (50-225 μm) wide, 1-4 per mm. Heterogeneous, composed of square and upright cells, up to several mm high, or composed of marginal rows of square and upright cells and a central part composed of procumbent cells and up to 600-1940 μm high (in total). Sometimes partly unlignified.
Parenchyma paratracheal as vasicentric rings. Strands of 2-4 cells. Apotracheal parenchyma unlignified, occuring as islands or bands in transverse sections, containing rhaphides and sometimes styloids and vitreous silica.
Fibres non-septate, lumen 18-24 μm, walls 3-4 μm. Pits simple, on the radial and tangential walls. The fibres are storied. Length: 825-1020 μm.