Pritchardiopsis
Pritchardiopsis jeanneneyi is endemic to New Caledonia palm. She is the only member of the genus Pritchardiopsis.
- 4.1 Notes and references
Features
Pritchardiopsis jeanneneyi is a moderately large, hermaphrodite fan palm. She is single-stemmed, and reinforced several times flourishing. The stem is erect, smooth and ringed with distinct leaf scars.
The chromosome number is unknown.
The leaves are folded induplicat, costapalmat short, and fall off with a smooth scar. The leaf sheath is divided into a network of fine, rust brown fibers. The petiole is long, up to the grooved top flat, rounded at the bottom. The handle edges are smooth distally, basal occupied in young plants with short, recurved spines, smooth in adult plants. The adaxial Hastula it short and round, the abaxial Hastula missing.
The leaf blade is stiff and regularly graduated to or through the middle, easily folded segments. The segments are short bifid, lanceolate and glabrous on both sides.
Inflorescences
The inflorescences are between the sheets ( interfoliar ) and are up to four times branched. The axes are angular. The peduncle is very short and flattened. A cover sheet is not visible and sets the base to. Bracts on the inflorescence stem missing. The inflorescence axis is very short and three long side divided axes of the first order. Each side axis bears a bract and two -tube support sheets for lateral axes of the second order. The other side axes of the second order have not tubed bracts. The flower-bearing axes ( Rachillae ) have no discernible bracts. They are short and are crowded at the end of the second-order lateral axes. They carry more far-removed winding of three flowers in the basal region, distal are the flowers individually.
Flowers
The flowers are sessile and have no Brakteolen. The calyx is persistent, Roehrig, basally fused with the receptaculum, and end up with three short free corners. The three petals are fused together basally short, hollowed valvat and distal hood -shaped. The six stamens are attached to the throat of the Crown, have upright filaments are short fused together and connected to the crown. The anthers are erect, almost spherical, arrow-shaped intrors. The gynoecium is spherical - dreilappig it three compartments and three ovules. The carpels are free in the fertile area, grown under control diaper area. The style is slender, short, ahlförmig with point-like scar. The ovule consists of basal and anatrop.
The pollen is ellipsoidal, sometimes slightly asymmetric. The germ is opening a distal sulcus. The longest axis measures 23 to 24 microns.
Fruit and seeds
The fruit is large, one seed, spherical and bears apical scar remains. The exocarp is smooth and purple, the mesocarp is fleshy to fibrous. The endocarp is woody, rounded on one side, on the opposite side with a keel. Laterally it is extended towards the base, it is narrowed. The seed is globular, upright, has a basal navel ( hilum ). The raphe is circular. The endosperm is homogeneous and is pressed to the base by a deep indentation of the seed coat.
Dissemination and locations
The genus is endemic to New Caledonia. It comes only in the southeast of the island on steep slopes on serpentine front, around 200 meters above sea level near the Bay of Prony. It has been a while extinct held until another three very small populations were discovered.
System
The genus Pritchardiopsis is placed in the subfamily Coryphoideae, Tribe Trachycarpeae, subtribe Livistoninae within the family Arecaceae. The genus is monotypic jeanneneyi with the sole representative Pritchardiopsis. Pritchardiopsis may be the sister group of a group of Johannesteijsmannia and Pholidocarpus.
Pritchardiopsis was first described by Beccari ODOARDO 1910 type species is the Pritchardiopsis described at the same time jeanneneyi. The genus name derives from the genus name and the suffix Pritchardia opsis for "similar" from.
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. 270-272.