Roystonea oleracea
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Roystonea oleracea |
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| Roystonea oleracea | ||||||||||||
| ( Jacq. ) OFCook |
Roystonea oleracea is a palm species of the genus Roystonea native toand around the Caribbean .
features
Like all members of the genus, Roystonea oleracea is a single-stemmed, monocular palm with large pinnate leaves. The trunk is gray, up to 40 m high and 46 to 66 cm in diameter. The crown consists of 20 to 22 leaves , the lowest of which are in or above the horizontal. The crown shaft is around 2 m long. The petiole is 60 to 100 cm long. The rachis is 4 to 4.6 m long, the middle leaf segments are 65 to 94 cm long and 8.8 to 16 cm wide.
The inflorescence is around 1.4 m long and 0.7 m wide. The cover sheet is 46.5 to 53 cm long and 8.8 to 16 cm wide. The cover leaf on the inflorescence stalk (spathe) is around 1.5 m long, widest above the middle. 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 awl-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 wide. The petals are oval, 2.6 to 3.4 mm long. The staminodes are six-lobed, 1.8 to 2.5 mm long and 0.9 to 1.2 mm free. The gynoeceum is 1.8 to 2.9 mm long with a diameter of 1.6 to 2.5 mm.
The fruits are ellipsoidal and humped, 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 how the seeds are ellipsoidal. The primary leaf is linear-lanceolate and weakly ribbed.
distribution
The species occurs in the Lesser Antilles , Barbados , Trinidad and Tobago , in northern Venezuela and in northeastern Colombia . It is naturalized in Guyana , Suriname and French Guiana .
Systematics
The species was of Nikolaus Joseph von Jacquin in 1763 under the name of Areca oleracea in 1763 first described . Martius placed the species in the genus Oreodoxa in 1837 , before Orator Fuller Cook transferred it in 1901 to the genus Roystonea , which he had newly established the year before .
Scott Zona was 1996, as processing of the genus for the "Flora Neotropica" a variety Roystonea oleracea var. Jenmanii (Waby) Zona described, which are only in different from the Nominatvarietät that the lower leaves at an angle of approximately 45 ° are up and which is only known in culture. This variety was not considered valid by Govaerts in the World Checklist of Palms .
supporting documents
- Scott Zona: Roystonea (Arecaceae: Arecoideae) . Flora Neotropica, Vol. 71, 1996, pp. 1-35. (JSTOR)
Individual evidence
- ^ Roystonea in the World Checklist of Selected Plant Families , accessed August 27, 2012.
