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Wattleseed Acacia are perennial woody crops of varying age and size with some reaching 4m tall and 5m across. [4] Their large size and multiple stems is an impediment to harvesting and has resulted in the development of several strategies of collecting seed pods, including 'finger stripping' of pods off of foliage, 'butt shaking' of the tree to dislodge pods, and whole biomass harvesting. [6]
Acacia pycnantha, most commonly known as the golden wattle, is a tree of the family Fabaceae. It grows to a height of 8 metres (26 feet) and has phyllodes (flattened leaf stalks) instead of true leaves. The profuse fragrant, golden flowers appear in late winter and spring, followed by long seed pods.
Sandplain wattle grows as a tall shrub or small tree typically to a height of 2 to 5 m (6 ft 7 in to 16 ft 5 in) but can grow as tall as 8 m (26 ft). [4] It is able to form suckers and form dense colonies. It has glabrous branchlets that are often covered in a fine white powdery coating giving it frosted appearance. [3]
A number of species, most notably Acacia mangium (hickory wattle), A. mearnsii (black wattle) and A. saligna (coojong), are economically important and are widely planted globally for wood products, tannin, firewood and fodder. [23] A. melanoxylon (blackwood) and A. aneura (mulga) supply some of the most attractive timbers in the genus.
An edible seed [n 1] is a seed that is suitable for human or animal consumption. Of the six major plant parts, [ n 2 ] seeds are the dominant source of human calories and protein . [ 1 ] A wide variety of plant species provide edible seeds; most are angiosperms , while a few are gymnosperms .
The straight to slightly curved pale brown coloured seed pods that form after flowering have a length of up to 9 cm (3.5 in) and a width of 6 mm (0.24 in) and contain black, oblong to ovoid shaped seeds with a length of around 7 mm (0.28 in) and a width of 4 mm (0.16 in).
The smooth, brown and linear shaped seed pods that form after flowering can be straight or curved and have a length of up to 12 cm (4.7 in) and a width of 5 mm (0.20 in). The hard, black seeds found within the pods have an ellipsoidal shape with a length of 7 mm (0.28 in) and a width of 4 mm (0.16 in).
Following flowering brown seed pods form that have an oblong shape and are around 8 cm (3 in) in length and 12 millimetres (0.472 in) wide. The pods are flat but raised over each seed. [ 3 ] The hard shiny black-brown [ 4 ] seeds have an ovoid shape and are about 5 mm (0.197 in) with a width of around 3.5 mm (0.138 in).