Nannorrhops

Nannorrhops ritchiana

Nannorrhops ritchiana or Mazari palm is a native to Arabia and the Middle East fan palm. It is the only species of the genus Nannorrhops.

• 5.1 Notes and references

Features

Nannorrhops ritchiana is a bush -shaped, multi-stemmed, non-reinforced palm. It blooms only once ( hapaxanth ), the individuals are hermaphroditic. The stems are branched, decumbent or upright. They are largely underground, but can be up to 4.5 m high. Bifurcation occurs axillae in prostrate copies, erect stems with dichotomous. An adult specimen in up to 6 m high and as wide, but usually they reach 1.8 m height and 2.4 m width.

The chromosome number is 2n = 36

The leaves are induplikat, costapalmat short. They dry on the plant. The leaf sheath tears on both below and opposite the petiole. It is brown, hairy woolly. The petiole is long at the top shallow grooved, rounded at the bottom. Hastulae missing. The leaf blade is regularly divided into stiff, blue-green, single folded segments. These are further divided by a abaxial crack which extends to the half.

Inflorescences

The inflorescences appear on the leaves, are composed and reach 1.8 m in length. The partial inflorescences meet the axillary inflorescences repeatedly blooming palm trees. Every part of inflorescence is in the armpit of a leaf with reduced leaf surface, or a high -tube sheet. The partial inflorescences are branched four times. The cover page is Roehrig and zweikielig. There is no gas to several bracts on the inflorescence stalk, similar to the previous sheet. The bracts of the side branches are first-order Roehrig with a clear top. Each axis of the first order, a basal, röhriges, zweikieliges cover page. The bracts of the side branches of the second order Roehrig. The flower-bearing axes have showy bracts -tube, in their armpits ever a group of flowers is.

Flowers

The flowers are short-stalked and are available in a shortened winding from one to three ( rarely up to seven) flowers, each flower has a small, high -tube sheet. The cup is thin, Roehrig at the base and has three triangular lobes. The crown has are short, stem-like base and three lobes in the lower two thirds klappig ( valvat ) imbricat in the upper third. The six stamens are not fused. The three antesepalen ( standing in front of the sepals ) have free stamens, the three antepetalen ( standing in front of the petals ) are fused at the base with the petals. The stamens are commended shaped, bent at the tip. The anthers are oblong, the anthers are latrors. The three carpels are fused, with the exception of the lowermost part. The ovary is clearly dreifurchig. There is a single pen, a scar is undifferentiated. The ovule is anatrop and is ventral to the basal and on.

The pollen grains are ellipsoidal and usually slightly asymmetrical. The germ is opening a distal sulcus. The Ectexine is tectat, reticulat or foveolat - reticulat. The edge of the germ opening psilat or scabrat. The Infratectum is columellat. The longest axis of the pollen grain measures 30 to 39 microns.

Fruit and seeds

The fruits are globose to ellipsoidal. They contain a seed. The scars radicals basal. The exocarp is smooth, the mesocarp fleshy and endocarp thin. The seed is globose to ovoid. He has shallow grooves that match the Raphenbündeln. The scar ( hilum ) sits basal. The endosperm is homogeneous and usually has a small central cavity. The embryo sits basal.

Dissemination and locations

Nannorhops ritchiana occurs in the semi-deserts of the Middle East: Eastern Arabia, southern Iran, West Pakistan and southern Afghanistan. It grows in areas where ground water is not too deep: oases and episodic rivers. However, it avoids subtropical coastal regions. It rises to 1600 m above sea level.

System

The genus Nannorrhops is placed in the subfamily and tribe Coryphoideae Chuniophoeniceae within the palm family. Your position to the other genera of the tribe is not yet finally resolved. It contains only one species, Nannorhops ritchiana.

The genus name is derived from the ancient Greek words for dwarf and bush, that refers to the habitus. The Style epithet refers to the collector of the material for the first description, Ritchie.

Use

From the palm fibers are obtained, which are used for weavings and for ropes. She is one of the most cold-resistant palm species, but is rarely considered as an ornamental plant.

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. 292-294.