Plant 1.5-2 m tall, stem to 1.5 m long, 10 cm diam., subterranean, rhizomatose. Leaves 6- 10; sheath not tubular, fibrous; peliole 45-60 cm long, ca. 1 cm diam., covered with woolly indumentum mostly on basal portion; rachis 50-55 cm long, smooth and glabrous or with scarce white glands or with woolly hairs; pinnae 35-53 per side, broad and long-lanceolate, with acute tips, regularly inserted in groups of (1-)2-3(-4), 2-3 cm apart, inserted to rachis and spreading at different angles, glabrous at base or with ramenta to 3 mm long, the transverse veinlets evident adaxially, lemon-green and lustrous waxy adaxially, brown-glaucous and waxy abaxially, obtuse apex asymmetrically split for 0.3-0.5 cm, with midrib prominent adaxially and depressed abaxially; basal pinnae 25-35 x 0.8-1.1 cm; middle pinnae 20-45 x 1.1-2 cm; apical pinnae 6-24 x 0.1-0.6 cm. Inflorescences 65-100 cm long; peduncle 55-85 cm long, 0.4-0.6 cm diam., robust, muricate, scarcely to densely covered with floccose hairs; rachilla 10-15 cm long, bearing scarious bracteoles; prophyll 20-30 cm, tubul ar, scarious, covered with woolly indumentum in base; peduncular bract 60-80 cm long, 3-6 cm diam., apiculate, woody, sulcate, beige externally, brown-violet and glabrous internally; peduncular bracts 1 or 2, 0.5-2.5 cm long, brown, scarious, revolute or apiculate, inserted 2 cm from apex of peduncle. Staminate flowers 9-11 mm long, the pedicel 3-5 mm, inserted perpendicular to rachilla; sepals free, glabrous, coriaceous, 2 ca. 5 x 1.5 mm, one larger ca. 7 x 1.5 mm; petals valvate, free, glabrous, coriaceous, ca. 6.5 x 3 mm; stamens (12-)14-18 proximally, sometimes 10 stamens distally, ca. 2.5 mm long, the filaments columnar, the anthers sagittate at both ends; pistillode simple. Pistillate flowers sessile on proximal 4-11 cm of rachilla; sepals free, trapezoid, ca. 5 x 6 mm, imbricate to the right, apiculate with papillose hairs on superior rim; petals free, triangular, ca. 5 x 4 mm, imbricate to the right, apiculate with papillose hairs on lateral to basal margins; staminodial ring to 1.5 mm with 6 short teeth; pistil conical, 3-4 mm; stigma trifid, glabrous. Fruit ovoid to turbinate, with orange to yellowish floccose hairs or tomentose from base of stigmas to middle, 1.2-2 cm long, 1- 1.3 cm diam., perpendicular to rachilla, the stigmatic remnants erect with stigmas to 3 mm long, the persistent perianth longer than ½ of fruit; seed 1-2; n = 16 (Read, 1966). 
The seashore palm is cultivated extensively in South America for the edible fruits which are eaten fresh or made into a drink or jam. The leaves are used to make baskets and other woven objects. The generic name of the seashore palm, Allogoptera, comes from the Ancient Greek words αλλαγή (allage), meaning change, and πτερόν (pteron), meaning wing, and refers to the swirled, changing pattern of the feathery leaves. The species name, arenaria comes from the Latin, for "sandy" or growing in sandy sites.
Allagoptera pumila Nees
Cocos arenaria Gomes
Diplothemium arenarium (Gomes) Vasc. & Franco
Diplothemium littorale Mart.
Diplothemium maritimum Mart.
Cold Hardiness Zone (USDA) 9b
The seashore palm is one of the best palms for beach and coastal situations in subtropical and tropical settings. It requires moderate to full sunlight and is used as a beach screen, being very tolerant of extreme coastal and beach exposure, as well as salt spray.
In its native environment, the seashore palm is highly tolerant of poor soils that have good drainage, thriving in soils that are thoroughly moist. Considered a slow grower when it is young, the seashore palm propagates by seeds.
BIBLIOGRAPHY & SOURCES
Contribution: John D. Kennedy, editor of The Palmateer, the quarterly newsletter of Central Florida Palm & Cycad Society (CFPACS) : "I live in Vero Beach, Florida, and have two big individuals more than 30 years old; the first is under a small flowering tree that casts little shade and this has grown and prospered (see the attached picture). The second is under a tree with more dense foliage, and it has struggled. I didn't understand at the time of planting (1980) that these palms--then... More
Bertrand Duvall il y a 5 ans 0 0