Prestoea

Prestoea montana

Prestoea is occurring in tropical America Palm genus. It is named after the British botanist Henry Prestoe ( 1842-1923 ).

Features

The trunks of the palm trees are short to medium in size. The palm trees are multi-stemmed, often single-stemmed. The leaves are pinnate, rarely simple. The leaf sheath is open and do not form a crown shaft. Rarely it is partially closed and form a partial crown shaft. The petiole is short to long, concave at the top, rounded at the bottom. The rachis is grooved at the top, at the bottom of rounded or flat. The leaflets are few or numerous, mostly linear- lanceolate with several secondary veins on each side of the midrib.

The inflorescences are simple branched, rarely spike- like or paniculate. They spring from the leaves and flowering erect or arching. Inflorescences are protandrous. The peduncle is often long, it is longer than the inflorescence axis. The cover sheet is shorter than the bract on peduncle and it is usually permanent. The bract is leathery and usually permanent. The side axes of the inflorescence are hairy scattered, flowering white, for fruit ripening red. The flowers are in triads.

The male flowers are asymmetrical. The sepals are not adherent and overlap at the bottom of something. The petals are also not fused and are flap-like to each other. The six stamens have dorsifixe, arrow-shaped anthers. The female flowers have a clear, broad overlapping sepals. The petals are also free, down broad overlapping briefly above klappig. There are six staminodes. The ovary is a unicompartmental ovule. This is attached to the side.

The fruits are globose, the scars rest remains slightly below the top. The seed has a standing basal embryo. The raphe is branched reticulate. The scar ( hilum ) is elongated. The endosperm is grooved, rarely homogeneous. The primary leaf is bipartite or pinnate.

Dissemination

The representatives of the genus are found in the West Indies, Central America and South America in the Andes and the Guayana Highlands.

System

The genus Prestoea is placed in the subfamily Arecoideae, Tribe Euterpeae within the family Arecaceae. A comprehensive cladistic analysis revealed a sister group, the genus Neonicholsonia, but was missing in this analysis by the representatives of the tribe the genus Oenocarpus.

Henderson and Galeano accepted in 1996 in her monograph ten species. These were taken over by Rafael Govaerts and John Dransfield in their World Checklist of Palms 2005:

• Prestoea acuminata
• Prestoea carderi
• Prestoea decurrens
• Prestoea ensiformis
• Prestoea longepetiolata
• Prestoea pubens
• Prestoea pubigera
• Prestoea schultzeana
• Prestoea simplicifolia
• Prestoea tenuiramosa

The genus was erected in 1883 by Joseph Dalton Hooker for the previous Asked in the genus Hyospathe kind Prestoea pubigera. This type is also the type species.

Documents

• Andrew Henderson, Gloria Galeano: Euterpe, Prestoea, and Neonicholsonia ( Palmae: Euterpeinae ). Flora Neotropica, Volume 72, New York Botanical Garden Press, New York 1996, pp. 1-90. ( JSTOR )