Oxalis gagneorum
| Oxalis gagneorum | ||||||||||||
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| Scientific name | ||||||||||||
| Oxalis gagneorum | ||||||||||||
| Fosberg & Sachet |
Oxalis gagneorum is a plant from the genus sorrel ( Oxalis ) within the family of Oxalidaceae (Oxalidaceae). It is endemic to the Marquesas Islands in the southern Pacific.
description
Appearance and leaf
Oxalis gagneorum grows as a small shrub and reaches heights of 0.3 to 1.2 meters. The smooth bark is dark brown and finely hairy on young shoots. Small twigs have conspicuous hairy or bare leaf bases and bud scars, making them look knotty .
The threefold leaves are arranged in groups on the trunks and small twigs and are divided into a petiole and a leaf blade. The 2 to 4 centimeters long, straight petiole and is almost bald or covered with fine or shaggy hair. The thickly hairy and hard base of the petiole is broadened and forms a furrow on the twigs, which remains even after the leaves have fallen off. The three-part, paper-like leaf blade is elongated-elliptical to broad-inverted-egg-shaped with a length of up to 3.5 centimeters and a width of up to 2.6 centimeters. The upper side of the blade, which is bare with the exception of the central leaf nerve, is green and the underside, sparsely to densely covered with white or brown hair, is glaucous . The base of the spade is broadly wedge-shaped to blunt and the tip of the spreader is rounded or slightly edged. Five to seven leaf veins branch off from each side of the hairy median nerve and the leaf surfaces are pinnate. There are no stipules .
Inflorescence and flower
The lateral, zymous inflorescences contain three to five flowers and are on a 0.5 to 2.5 centimeter long peduncle. This is narrow, cylindrical in shape and sparsely hairy. The inflorescence ends in a single flower as well as in several 0.5 to 1 centimeter long inflorescence axes with one to two stalked flowers each. The bracts are shaggy ciliate or densely hairy and with a length of 1.5 to 3.5 millimeters lanceolate to ovate-subpulate.
The stalked, hermaphrodite flowers are radial symmetry and five-fold with a double flower envelope . The five membrane-like sepals are 4 to 6 millimeters long, broadly lanceolate to ovate. The underside and the edges of the sepals are sparsely hairy. The five, rarely up to eight, yellow petals are 1.2 to 3.5 centimeters long and 0.3 to 0.5 centimeters wide and approximately obovate to spatulate and are divided into a nail and a nail Plate. The very thin and ten to twelve-nerved nail is 0.5 to 1 centimeter long and 1.5 to 1 millimeter wide. The 1 to 1.5 centimeter long, finely lashed plate is broadly elliptical to obovate with a blunt upper end. There are two circles, each with five stamens that have grown together at their base, the longer 1.4 to 1.6 centimeters and the shorter 1.1 to 1.4 centimeters long. The flat stamens are slightly fused together at their base. The elongated anthers are up to 1 millimeter in size and the pollen is bluish in color. The bald stylus is 0.15 to 0.6 inches long and has five branches. The lanceolate shaped ovary is about 0.8 centimeters.
Fruits and seeds
The broadly cylindrical to almost elliptical, somewhat hairy capsule fruits are 0.9 to 1.5 inches long and 0.3 to 0.4 inches thick. They are twisted to maturity. The fruits are ribbed five times, with the ribs being finely hairy. The shiny brown, slightly wrinkled seeds are 1.3 to 1.4 millimeters long and 0.8 to 1.2 millimeters in diameter, egg-shaped and somewhat flattened.
Occurrence
The natural range of Oxalis gagneorum is on the Marquesas Islands in the southern Pacific . It includes the islands of Eiao , Fatu Hiva , Hiva Oa , Nuku Hiva , Tahuata and Ua Huka .
Systematics
The first description of Oxalis gagneorum was made in 1981 by Francis Raymond Fosberg and Marie-Hélène Sachet in Smithsonian Contributions to Botany , Number 47, pages 4 to fifth
swell
- Oxalis gagneorum. In: Flora of the Marquesas Islands. www.botany.si.edu/pacificislandbiodiversity/marquesasflora, accessed on December 3, 2017 (English).
Individual evidence
- ↑ a b c d e f Oxalis gagneorum. In: Flora of the Marquesas Islands. www.botany.si.edu/pacificislandbiodiversity/marquesasflora, accessed on December 3, 2017 (English).
- ↑ Oxalis gagneorum at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed December 3, 2017.