Maxburretia

Maxburretia is a native to the Malay Peninsula palm genus.

• 4.1 Notes and references

Features

The representatives are bushy dwarf palms with short or no stem. They are dioecious or hermaphrodite fan palms. They are repeatedly flowering and non-reinforced. Where a strain is present, it is densely covered with leaf scars and completely covered by the persistent leaf sheaths.

The number of chromosomes is not known.

The leaves are fan-shaped ( Palmat ) induplicat and dry up on the plant. The leaf sheath dissolves into a mass of fibers and can be prickly. The petiole is well marked, unarmed and semi-circular in cross-section. The Hastula on the upper leaf surface is triangular to rounded, sometimes hairy; the Hastula on the lower leaf surface is formed only indistinctly. The leaf blade is cut to about two-thirds of its radius in sleek, simple folded, mostly bald segments.

Inflorescences

The inflorescences are usually solitary, between the leaves and arching stand out from the crown of leaves. They are branched from one to three times. The cover page is Roehrig, zweikielig, narrow, long and mostly hidden by the leaf sheaths. There are one to three, even more bracts on the inflorescence stalk, similar to the previous sheet. The bracts of the inflorescence axis are narrow Roehrig, each carrying a lateral axis of the first order. The bracts of higher order are very small and inconspicuous. The flower-bearing lateral axes ( Rachillae ) are slim. On them are removed, and in a spiral arrangement of small, triangular bracts, stands in their armpits each a single flower, rarely two or three flowers.

Flowers

The flowers are very small. In dioecious plants, male and female flowers are similar. The three sepals are free imbricat, oval to triangular and bald. The three petals are fused into a third to a half, oblong and usually slightly thickened tips. Male and hermaphrodite flowers have six stamens that are fused with the petals. The stamens form a thin or thick cup-shaped structure ( cupula ). You can also be free. The anthers are rather short and latrors. The staminodes in the female flowers are similar to the stamens, but form a narrow cupula and have small, empty anthers. The gynoecium composed of three free carpels connected short of the base. The stylus is triangular. The ovules are attached to the base, anatrop or in a middle position between anatrop and hemianatrop. Male flowers have a very small, three-lobed stamp rudiment.

The pollen is ellipsoidal and usually bisymmetrical. The germ is opening a distal sulcus. The longest axis measures 15 to 19 microns.

Fruit and seeds

The fruit usually develops from only one carpel. It is ellipsoidoisch, at the top are the scars residues. The perianth is also retained. The exocarp is young occupied with silvery hair that fall to fruit ripening. The mesocarp is thin and fleshy, hardly developed endocarp. The seed is to basal endosperm and homogeneous and has a small lateral indentation of the seed coat. The embryo is located, and laterally opposite to the indentation. The Eophyll is simple, entire and folded.

Dissemination and locations

The three species are restricted to a small area on the Malay Peninsula in southern Thailand and West Malaysia. All species grow in low forest on exposed sites and peaks of the limestone hills that are partly karstified.

System

The genus Maxburretia is placed in the subfamily Coryphoideae, Tribe Trachycarpeae, subtribe Rhapidinae within the family Arecaceae. The monophyly of the genus has not yet been investigated. Their sister group is depending on the examination Rhapis or group from Rhapis and Guihaia.

In the World Checklist of Selected Plant Families of the Royal Botanic Gardens, Kew, the following types are recognized:

• Maxburretia gracilis komt prior to the Langkawi Islands and at one site in southern Thailand
• Maxburretia rupicola ( type species ) occurs in Selangor

The genus is named after the German researcher Karl Ewald Maximilian Palm burret ( 1883-1964 ).

Documents

• John Dransfield, Natalie W. Uhl, Conny B. Asmussen, William J. Baker, Madeline M. Harley, Carl E. Lewis: Genera palmarum. The Evolution and Classification of Palms. Second edition, Royal Botanic Gardens, Kew 2008, ISBN 978-1-84246-182-2, pp. 258-260.