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The largest seed in the world is the coco de mer, [1] [2] the seed of a palm tree. [3] It can reach about 30 centimetres (12 inches) long, and weigh up to 18 kilograms (40 pounds).
Pritchardia schattaueri, the lands of papa pritchardia [2] or Schattauer's loulu, [3] is a species of palm tree in the genus Pritchardia that is endemic to mixed mesic forests on the southwestern part of island of Hawaiʻi, near Kona. It is officially listed as a Critically endangered species. [1]
Pritchardia kaalae, also known as Waianae Range pritchardia [4] or loulu palm, is a species of palm tree that is endemic to the western part of the island of Oʻahu in Hawaiʻi. It grows near springs in the dry forests on the Waiʻanae Range at elevations up to 2,500 feet (760 m).
Macrozamia riedlei, commonly known as a zamia or zamia palm, is a species of cycad in the plant family Zamiaceae. It is endemic to southwest Australia and often occurs in jarrah forests . It may only attain a height of half a metre or form an above trunk up to two metres with long arching fronds of a similar length.
The tree produces spiky green fruits about the size of a golf ball, which turn brown and drop off the tree over an extended period beginning in fall and continuing over the winter.
The kernels are picked up from the ground after the ripe fruit has detached from the tree and forest animals have taken care of the pericarp, or harvested when ripe and the pericarp manually removed. As the nut shrinks when it hardens, a small hollow cavity can form in the center.
The seeds sometimes germinate there and grow as epiphytes on the palm tree. [5] This palm tree is commonly pollinated by sap beetles of genus Mystrops and weevils of tribe Madarini. [9] The weevil Pachymerus cardo is known to be a seed predator on this species. [8] Rhodinus stali, an insect which is a vector of Chagas disease, may infest this ...
Bacaba produces more fruits than any other palm in central Amazonia, averaging around 2500 per bunch. Bunches usually weigh about 3–4 kg, but can weigh up to 10 kg. The fruit is a drupe weighing up to 3.0 grams. Propagation is by seeds that germinate in 60–120 days, with slow growth.