Roystonea borinquena

Roystonea Borinquena

Roystonea Borinquena is a native to the Caribbean palm tree in the genus Roystonea.

Features

Roystonea Borinquena has a gray -brown to zimtbraunen strain of up to 15 m in height and a diameter of 26.2 to 47 cm. The crown consists of 15 leaves, with the lower leaves much to hang below the horizontal. The crown shaft is 1.5 to 1.7 m long. The leaf stalks are 30 to 55 cm long, the rachis 3.8 to 4.5 m. The middle leaflets are 67-125 cm long and 2.5 to 5.2 cm wide.

The inflorescence is 1 to 1.4 m long and 0.7 to 1.2 m wide. The cover page is 43-74 cm long and 10.3 to 18.5 cm wide. The spathe is 0.9 to 1.6 m long, in the middle at the widest and with a pointed end. The lateral branches are 15 to 33 cm long and have a diameter of 1.4 to 2.5 cm.

The male flowers are creamy - yellow with bright purple anthers. The sepals are triangular to reniform, 0.7 to 1.4 mm long and 1.2 to 2 mm wide. The petals are elliptical to oval, 5.3 to 6.4 mm long and 3 to 3.7 mm wide. The six to nine stamens 4 to 7.4 mm long, the stamens are commended shaped 2.9 up to 6 m long, the anthers 2.5 to 4.3 mm. The ovary rudiment is very small.

The female flowers are creamy - yellow color, the sepals are kidney-shaped, 1.2 to 2.4 mm long and 3 to 4.1 mm wide. The petals are oval, 2,4 to 4.4 mm long. The Staminodium is sechslappig, 2,3 to 3.2 mm long and free for 0.9 to 1.7 mm. The die is 1.7 to 3.3 mm long and has a diameter of 1.5 to 3.1 mm.

The fruits are globose to ellipsoidal. Its length is 11.6 to 15 mm. The exocarp is brown to black. The endocarp is ellipsoidal and 9.1 to 11.8 mm long. The seed is dorsiventrally compressed ellipsoidal and 7.4 to 10.1 mm long. The raphe is circular. The primary blade is linear - lanceolate, 19 to 23.3 cm long and 1.6 to 2.2 cm wide.

Dissemination

Roystonea Borinquena is on the island of Hispaniola very common and here comes in heights up to 800 m before and missing only in the driest areas. In Puerto Rico it grows in low to medium layers on soils over limestone. On the north coast, it is quite common at the foot of the limestone hills called mogotes. It also occurs on the islands of Vieques east of Puerto Rico and St. Croix (U.S. Virgin Islands ).

Use

In their area of ​​distribution the leaves of the palm tree are used for roofing. The fruits are used as pig feed.

Documents

• Scott Zona: Roystonea ( Arecaceae: Arecoideae ). Flora Neotropica, Volume 71, 1996, pp. 1-35. ( JSTOR )

• Palmaceus
• Arecaceae