Roystonea oleracea
Roystonea oleracea
Roystonea oleracea is a domestic in and around the Caribbean palm tree in the genus Roystonea.
Features
Like all members of the genus Roystonea oleracea is a single -stemmed, monoecious palm tree with large pinnate leaves. The trunk is gray, up to 40 m high with a diameter of 46-66 cm. The crown consists of 20 to 22 leaves of which are the lowest at or above the horizontal. The crown shaft is about 2 m long. The petiole is 60 to 100 cm long. The rachis is at 4 to 4.6 m long, the average leaf segments are 65-94 cm long and 8.8 cm to 16 cm wide.
The inflorescence is about 1.4 m long and 0.7 m wide. The cover sheet is 46.5 to 53 cm long and 8.8 cm to 16 cm wide. The cover sheet on the inflorescence stem ( spathe ) is approximately 1.5 m long, over the middle at the widest. The flower-bearing axes ( Rachillae ) are 16 to 30 cm long and have a diameter of 1.5 to 2.8 mm. The male flowers are white, the sepals are triangular, 1.4 to 1.7 mm long and 1.6 to 2.6 mm wide. The petals are elliptical to oval 3 to 4.8 mm long and 1.4 to 2.7 mm wide. The six to eight stamens are 4.4 to 8.8 mm long, the stamens are commended shaped and 3 to 6.9 mm long, the anthers 3.5 to 4.7 mm. The female flowers are white, there are 2.5 to 4.5 flowers per cm. The sepals are kidney-shaped, 1.5 to 1.8 mm long and 3.3 to 4.3 mm inclusive wide. The petals are oval, 2.6 to 3.4 mm long. The staminodes are sechslappig, 1.8 to 2.5 mm long and free for 0.9 to 1.2 mm. The gynoecium is 1.8 to 2.9 mm long with a diameter of 1.6 to 2.5 mm.
The fruits are ellipsoidal and hunchbacked, from 12.6 to 17.6 mm long, dorsiventrally 8.2 to 10.8 mm thick, and 7.6 to 10.4 mm wide.. The exocarp is purple - black with a flat scar. The endocarp as the seeds are ellipsoidal. The primary leaf is ribbed linear- lanceolate and weak.
Dissemination
The species occurs in the Lesser Antilles, Barbados, Trinidad and Tobago, in northern Venezuela and northeastern Colombia. In Guyana, Suriname and French Guyana it is naturalized.
System
The species was first described by Nikolaus Joseph von Jacquin in 1763 under the name Areca oleracea 1763. Martius provided the type 1837 in the genus Oreodoxa, before 1901 led Orator Fuller Cook in the newly established previously by him in the genus Roystonea.
Scott Zona had in 1996 in his description of this genus for the "Flora Neotropica " a variety Roystonea oleracea var jenmanii ( Waby ) Zona described by the Nominatvarietät differed only in that the lower leaves are upwards at an angle of approximately 45 ° and which is known only in culture. This variety was not considered by Govaerts in the World Checklist of Palms as valid
Documents
- Scott Zona: Roystonea ( Arecaceae: Arecoideae ). Flora Neotropica, Volume 71, 1996, pp. 1-35. ( JSTOR )