Artocarpus

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Artocarpus

<<<Infructescences>Seeds>Cotyledons>Shape

equal and thick1
1. 006-001-001-001

<<Infructescences>Seeds>Cotyledons

cotyledons .2
2. 006-001-001

<<Pistillate inflorescences>Flowers>Flower number

numerous3
3. 005-002-001

<<Pistillate inflorescences>Stigma>Shape

subulate to spathulate4
4. 005-003-002

<<Pistillate inflorescences>Stigma>Stigma number

1-25
5. 005-003-001

<<Staminate inflorescences>Perianth>Shape

tubular6
6. 004-002-001

<<Staminate inflorescences>Stamens>Stamen number

17
7. 004-003-001

<Inflorescences>Bracts

usually with bracts8
8. 003-001

<Infructescences>Seeds

seed large, without endosperm,9
9. 006-001

<Leaves>Blade

blade entire or pinnately incised, innately veined.10
10. 002-002

<Leaves>Stipules

stipules fully amplexicaul, free;11
11. 002-001

<Pistillate inflorescences>Flowers

flowers ;12
12. 005-002

<Pistillate inflorescences>Shape

globose to ellipsoid capitate13
13. 005-001

<Pistillate inflorescences>Stigma

stigmas , .14
14. 005-003

<Staminate inflorescences>Perianth

perianth ;15
15. 004-002

<Staminate inflorescences>Shape

clavate to subspicate16
16. 004-001

<Staminate inflorescences>Stamens

stamens .17
17. 004-003

Description

Trees, monoecious. Leaves in spirals; stipules fully amplexicaul, free; blade entire or pinnately incised, innately veined. Inflorescences unisexual, in the leaf axils or on the main branches and the trunk, usually with bracts. Staminate inflorescences clavate to subspicate; perianth tubular; stamens 1. Pistillate inflorescences globose to ellipsoid capitate, flowers numerous; stigmas 1-2, subulate to spathulate. Infructescences large, with a firm outer layer and a soft layer containing the fruits; seed large, without endosperm, cotyledons equal and thick.

Distribution

Asian mainland present, Malaysia present, all over the tropics cultivated
Asian mainland and Malaysia: 47 species, 2 of them cultivated all over the tropics.

Habit

Trees, monoecious.18
18. 001

Inflorescences

Inflorescences unisexual, in the leaf axils or on the main branches and the trunk, .19
19. 003

Infructescences

Infructescences large, with a firm outer layer and a soft layer containing the fruits;20
20. 006

Leaves

Leaves in spirals;21
21. 002

Notes

This genus is introduced into the Guianas. No samples from this area are available. The description is based on material from the natural area of origin (ter Welle et al., 1986B).

Pistillate inflorescences

Pistillate inflorescences ,22
22. 005

Staminate inflorescences

Staminate inflorescences ;23
23. 004

Wood

Vessels diffuse, solitary (45-80%) and in short radial multiples and irregular clusters of 2-4, round and oval, 2-6 per sq. mm, diameter 160-310 μm (in the Guianas 100-150μm for A. heterophyllus, and 180-230μm for A. altilis). Vessel-member length: 350-630 μm. Perforations simple. Inter- vascular pits alternate, round, polygonal and occasionally slightly oval, 9-13 μm. Vessel-ray and vessel-parenchyma pits larger, half-bordered, the borders sometimes reduced. Thin-walled tyloses common, but occasionally absent. White deposits sometimes present.
Rays uniseriate and 3-5-seriate, 3-6 per mm, up to 60-1200 μm high. Heterogeneous, composed of procumbent cells, except for the uniseriate margins of 1-2(5) rows of square and/or upright cells. Occasionally few sheath cells present. Radial latex tubes common.
Parenchyma aliform with short to long wings, occasionally confluent, and sporadically in short wavy bands. Strands of 3-4 cells.
Fibres non-septate, lumen 7-25 μm, walls 2-4 μm. Pits simple, small, confined to the radial walls. Gelatinous fibres present or absent. Length: 1170-1950 μm. F/V ratio: 2.3-3.9.
Vitreous silica common, in the fibres or in the vessels, often enveloping the tyloses. Axial latex tubes sometimes present.