Pandanus utilis
Bory
Pandanus, Screw Palm, Spinner,
Spinner
Evergreen tree between 3-7 m high, with a straight, smooth trunk and
abundant dichotomous branching at the top, forming a dense, more or less
pyramidal crown. The stems are covered with a bark very marked by the
annular scars left by the dead leaves.
Its main characteristic is
that numerous aerial roots emerge from the lower part of the trunk, pale
brown in colour and about 3-7 cm in diameter, which descend vertically
until they touch the ground, providing support and balance to its wide,
heavy crown.

Its very long, bluish-green leaves, between 50-100 cm long and 6-8 cm
wide, grow erect or ascending, and arranged in a spiral of three series,
finally grouping together in the terminal zone of the stems.
They are
simple, sessile, but base-hugging, broadly linear, pointed, with
numerous parallel longitudinal nerves, and with reddish ascending
spines, 1-4 mm long, located on their margins and on the midrib on the
underside.
It is a dioecious plant, with male and female flowers in separate
specimens.
The male flowers are grouped in an inflorescence in the
form of a hanging branched spadix about 30-80 cm long, surrounded by a
whitish spathe, with numerous fragrant flowers, consisting of 6-10
stamens welded in small columns 10-12 mm long, with pale yellow oblong
anthers.
The female flowers are arranged in solitary inflorescences,
long stalked, pendulous, subglobose, and formed by numerous densely
grouped carpels.
The fruit, more or less spherical and up to 15-20 cm
in diameter, hangs from a stout peduncle, and is formed by a set of
several fruits welded together, in the manner of a pine cone, called
syncarp, made up of about 100-200 compressed drupes, with slits between
them, green at first, yellow later, and reddish at the base.