Photos 5/5/2016 by George Konstantinou
See also
Monday, 9 May 2016
Η εκκλησία της Παναγίας (Νεκροταφείο) στο Ριζοκάρπασο - Church of Panagias at rizokarpaso - Cyprus
Photos 5/5/2016 by George Konstantinou
Sunday, 8 May 2016
Cerianthus membranaceus (Spallanzani, 1784) - Cyprus
Cerianthus membranaceus, the cylinder anemone or coloured tube anemone, is a species of large, tube-dwelling anemone in the family Cerianthidae. It is native to the Mediterranean Sea and adjoining parts of the northeastern Atlantic Ocean.
Cerianthus membranaceus is a large, tube-dwelling anemone. The oral disc can have a diameter of up to 40 cm (16 in). There are two whorls of tentacles, amounting to about two hundred tentacles in all. Those in the outer whorl are long and slender and armed with cnidocytes (stinging cells) and are used for catching prey. Tentacles in the inner whorl are shorter and function to transfer captured food to the central mouth. The tentacles are sometimes banded and come in an array of colours; white, yellow, orange, green, brown, blue, black, purple and violet. The colour of the inner whorl often contrasts with that of the outer whorl.
The column of this tube anemone secretes mucus in which is embedded a unique type of cnidocytes that mesh together to form a fibrous structure. Sand and other particles adhere to this and it forms a leathery, protective tube up to 40 cm (16 in) in length. There is no pedal attachment and the lower end of the tube is buried in the soft substrate. The tube is open at the base which allows for escape of water when the animal retreats into the tubeCerianthus membranaceus is found on the seabed in shallow water in the Mediterranean Sea, the northern Adriatic Sea and the northeastern Atlantic Ocean, its range extending as far north as Britain. It occurs on sandy or silty substrates where its tube is buried vertically in the sediment. In the Mediterranean, it principally occurs in areas with high levels of organic matter, such as in zones of pollution off Marseille, where it is present at high densities throughout the year.
The tentacles of Cerianthus membranaceus do not retract, but the whole animal can retreat into its tube. As it does so, some of the tentacles grip the rim and pull the tube closed behind it, effectively making it disappear from view. The tube is normally a permanent home, but if the anemone is disturbed from below, as by a burrowing sea urchin, it can eject itself from its tube, move to a new location and secrete a new tube.
C. membranaceus feeds on small fish and planktonic organisms which it catches with its tentacles. It is a protandrous hermaphrodite, starting life as a male and becoming a female later. The gametes are liberated into the sea and after fertilisation, the developing larvae drift with the plankton for a long time before settling on the seabed and undergoing metamorphosis into juvenile polyps.
The tube is used as a refuge by many commensal organisms, especially polychaete worms and shrimps. The horseshoe worm, Phoronis australis, often attaches itself to the outside of the tube. There may be twenty to fifty horseshoe worms associated with one tube anemone.
The lifespan of C. membranaceus in the wild is not known, but some individuals have been occupants of a tank in Naples Aquarium for more than fifty years
From Wikipedia, the free encyclopedia
Underwater photo17mts deep,Protaras,08.05.2016 by Costas Constantinou
Saturday, 7 May 2016
Red mulberry - Morus rubra - Κόκκινη μουριά - Μορέα η ερυθρά - Συκαμιά - Μουριά - Cyprus
Morus rubra, commonly known as the red mulberry, is a species of mulberry native to eastern and central North America. It is found from Ontario, Minnesota, and Vermont south to southern Florida, and west as far as southeastern South Dakota, Nebraska, Kansas, and central Texas. There have been reports of isolated populations (very likely naturalized) in New Mexico, Idaho, and British Columbia.
Common in the United States, it is listed as an endangered species in Canada, and is susceptible to hybridization with the invasive white mulberry (M. alba), introduced from Asia.
Red mulberry is a deciduous tree, growing to 10–15 m tall, rarely 20 m, with a trunk up to 50 cm diameter. The leaves are alternate, 7–14 cm long and 6–12 cm broad, simple, broadly cordate, with a shallow notch at the base, typically unlobed on mature trees although often with 2-3 lobes, particularly on young trees, and with a finely serrated margin. The upper surface of the leaves is noticeably rough, similar in texture to fine sandpaper, and unlike the lustrous upper surface of the leaves of white mulberry (M. alba). The underside of the leaves is covered with soft hairs. The leaf petiole exudes milky sap when severed. Red mulberry is hardy to subzero temperatures, relatively hardy to drought, pollution, and poor soil, though the white mulberry is hardier.The flowers are relatively inconspicuous: small, yellowish green or reddish green, and opening as leaves emerge. Male and female flowers are usually on separate trees although they may occur on the same tree.
The fruit is a compound cluster of several small achenes surrounded by a fleshy calyx, similar in appearance to a blackberry, 2–3 cm long, when it is ripening it is red or dark purple, edible and very sweet with a good flavor.
The first English colonists to explore eastern Virginia in 1607 mentioned the abundance of both mulberry trees and their fruit, which was eaten, sometimes boiled, by the native Powhatan tribes.
Today, mulberries are eaten raw, used in fruit pastries, and fermented into wine.
The wood may be dried and used for smoking meats with a flavor that is mild and sweet.
From Wikipedia, the free encyclopedia
Photos Leukonico 5/5/2016 by George Konstantinou
White henbane or Yellow henbane - Hyoscyamus albus L. - Δοντόχορτον - Cyprus
Hyoscyamus albus, the white henbane or yellow henbane, is a plant in the family of Solanaceae. It is native to Southern Europe, North Africa, West Asia and Macaronesia.
Description
Erect plant 20-80 cm tall, sticky and covered with glandular-woolly hairs. All leaves stalked, ovate, bluntly sinuately toothed, Flowers 3 cm across, only the lowest ones stalked, in dense, leafy spike-like inflorescences, the flowers mostly facing the same way. Corolla tubular to bell-shaped, almost regular, with 5 lobes, glandular hairy outside, usually yellowish white, the throat green or purple. Anthers not or only slightly protruding. Calyx densely glandular-woolly 2-2.5 cm long at fruiting-time. Slightly poisonous plant. Flowers March to September. Waste ground, road sides, on walls, often near and in settlements, villages, towns, ancient sites. Mediterranean region, Canary Islands, eastwards to S. Russia and Iraq.
Medicinal use
In the mythological tradition the discovery of the hallucinogenic properties of white henbane (Hyoscyamus albus) has been attributed to the Greek divine hero Heracles. Doctors of the Hippocratic school of medicine gave an infusion of the seeds in wine in cases of fever, tetanus and female disorders, for example, where paralysis occurred after childbirth, Dioscorides used both seed and leaves pounded and soaked with hot water to deaden pain and preferred white henbane (Hyoscyamus albus) to other species more likely to cause madness and induce sleep.From Wikipedia, the free encyclopedia - https://en.wikipedia.org/wiki/Hyoscyamus_albus
Photos Leonariso 5/5/2016 by George Konstantinou
Evening primrose - Oenothera sp. - Cyprus
Escape from gardens
Oenothera is a genus of about 145 species of herbaceous flowering plants native to the Americas. It is the type genus of the family Onagraceae. Common names include evening primrose, suncups, and sundrops. They are not closely related to the true primroses (genus Primula).
The species vary in size from small alpine plants 10 centimeters tall, such as O. acaulis from Chile, to vigorous lowland species growing to 3 meters, such as O. stubbei from Mexico. The leaves form a basal rosette at ground level and spiral up to the flowering stems. The blades are dentate or deeply lobed (pinnatifid). The flowers of many species open in the evening, hence the name "evening primrose". They may open in under a minute. Most species have yellow flowers, but some have white, purple, pink, or red. Most native desert species are white. Oenothera caespitosa, a species of western North America, produces white flowers that turn pink with age. One of the most distinctive features of the flower is the stigma, which has four branches in an X shape.
Oenothera flowers are pollinated by insects, such as moths and bees. Like many other members of the Onagraceae, however, the pollen grains are loosely held together by viscin threads, so only insects that are morphologically specialized to gather this pollen can effectively pollinate the flowers. Bees with typical scopa cannot hold it. Also, the flowers open at a time when most bee species are inactive, so the bees which visit Oenothera are generally vespertine temporal specialists: bees that forage in the evening. The seeds ripen from late summer to fall.Oenothera are used as food plants by the larvae of some Lepidoptera species. The flower moths Schinia felicitata and S. florida both feed exclusively on the genus, and the former is limited to O. deltoides.
In the wild, evening primroses act as primary colonizers, quickly appearing in recently cleared areas. They germinate in disturbed soils, and can be found in habitat types such as dunes, roadsides, railway embankments, and waste areas. They are often casual and are eventually outcompeted by other species.The genus Oenothera may have originated in Mexico and Central America, and spread farther north in North America and into South America. With the advent of international travel, species are now found in most temperate regions of the world. In Europe alone there are about 70 introduced species of Oenothera. During the Pleistocene era a succession of ice ages swept down across North America, with intervening warm periods. This occurred four times, and the genus experienced four separate waves of colonization, each hybridizing with the survivors of previous waves. This formed the present-day subsection Euoenothera. The group is genetically and morphologically diverse and the species are largely interfertile, so the species boundaries have been disputed amongst taxonomists.
This pattern of repeated colonizations resulted in a unique genetic conformation in the Euoenothera whereby the chromosomes at meiosis can form circles rather than pairs. This is the result of several reciprocal translocations between chromosomes such that the pairing occurs only at the tips. This phenomenon apparently has non-Mendelian genetic consequences; with this mode of chromosome segregation and a system of balanced-lethal genes, genetic recombination is prevented and the plants display the hybrid vigor of heterosis. This resulted in the evolution of many sympatric races in North America east of the Rocky Mountains. Analysis of the cytology of these races and of artificial hybrids between them increased understanding of the genetic and geographic evolution of the Euoenothera. This subject was a major area of genetic research during the first half of the 20th century.
From Wikipedia, the free encyclopedia
Photos Gialousa 5/5/2016 by George Konstantinou
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