Thursday, 26 January 2017

FFF270 - DURANTA

Duranta erecta is a species of flowering shrub in the verbena family Verbenaceae, native from Mexico to South America and the Caribbean. It is widely cultivated as an ornamental plant in tropical and subtropical gardens throughout the world, and has become naturalised in many places. It is considered an invasive species in Australia, China, South Africa and on several Pacific Islands. The genus name is in honour of Castore Durante, a fifteenth-century Italian botanist. The specific epithet erecta means "upright" in Latin. The plant is also known as D. repens, from the Latin for "creeping". The latter name was originally used to identify smaller-leaved varieties of the species.

Common names include golden dewdrop, pigeon berry, and skyflower. In Mexico, the native Nahuatl name for the plant is xcambocoché. In Tonga it is known as mavaetangi (tears of departure). Duranta is registered as an invasive weed by many councils of Australia. It is a prolific, fast growing weed that is spread by birds from domestic areas to natural reserves. It was introduced and marketed as a hedge plant some years ago. Many people now fight to keep this thorny pest under control. It is highly ranked in the most invasive weeds in Australia.

Duranta erecta is a sprawling shrub or (infrequently) a small tree. It can grow to 6 m tall and can spread to an equal width. Mature specimens possess axillary thorns, which are often absent on younger specimens. The leaves are light green, elliptic to ovate, opposite, and grow up to 7.5 cm long and 3.5 cm broad, with a 1.5 cm petiole. The flowers are light-blue or lavender, produced in tight clusters located on terminal and axillary stems, blooming almost all year long. The fruit is a small globose yellow or orange berry, up to 11 mm diameter and containing several seeds. The leaves and berries of the plant are toxic, and are confirmed to have killed children, dogs and cats. However, songbirds eat the fruit without ill effects.

The cultivar illustrated is the hybrid "China Girl".

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Thursday, 19 January 2017

FFF269 - MARIGOLD

Tagetes erecta, the Mexican marigold, also called Aztec marigold, is a species of the genus Tagetes, family Asteraceae, native to Mexico. Despite its being native to the Americas, it is often called African marigold. In Mexico, this plant is found in the wild in the states of State of México, Puebla, and Veracruz. This plant reaches heights of between 50 and 100 cm. The Aztecs gathered the wild plant as well as cultivating it for medicinal, ceremonial and decorative purposes. It is widely cultivated commercially with many cultivars in use as ornamental plants, and for the cut-flower trade.

The ray florets have been used in lettuce salads and other foods to add colour and flavour. The dried flower petals, ground to a powder, may be used in poultry feed to ensure a good colouration of egg yolks and broiler skin, especially in the absence of well-pigmented yellow maize in the feed. This is still a use today, but now usually in the form of an extract which may have advantages of lower transport and storage cost, better stability and better utilisation. It is also used to enhance colouring in crustaceans, such as the Pacific white shrimp (Litopenaeus vannamei).

The oil of the flower may be added to perfumes to infuse an apple scent into them. Today, T. erecta is grown to extract lutein, a common yellow/orange food colour (E161b). The essential oil of the flower contains antioxidants.

Since prehispanic times, this plant has been used for medicinal purposes. The Cherokee used it as a skin wash and for yellow dye. This marigold may help protect certain crop plants from nematode pests when planted in fields. It is most effective against the nematode species Pratylenchus penetrans.

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Thursday, 12 January 2017

FFF268 - ROSA 'PIERRE DE RONSARD'

Rosa 'Pierre de Ronsard' is a moderately vigorous, climbing rose ideal to cover an arch or small trellis. Bred in France, by Meilland and introduced in 1987, 'Pierre de Ronsard' is a very disease resistant rose. The 7 to 10 cm globular flowers comprising 55 to 60 petals are a very attractive creamy white suffused with carmine pink borne singularly or in clusters up to 4 blooms on reasonably sturdy stems.

Adding to its seductive, colourful display these flowers have a light, delicious tea rose fragrance. Flowers last reasonably well when picked for floral arrangements. This rose has performed well throughout the world and thrives in our Melbourne climate. When grown against an arch, the plant can achieve heights around 3 metres, so it is preferable to plant a rose each side of the arch to achieve a complete and even cover in 3 to 4 years. Regular removal of spent blooms will ensure repeat and constant flowering throughout the growing season.

'Pierre de Ronsard' roses have a few thorns implying the arch needs to be at least 1.5m wide to avoid being caught by thorns when passing through the arch. For romantics, an arch of 'Pierre de Ronsard' provides a classic framework setting for photography, such as wedding photographs. Due to its popularity 'Pierre de Ronsard' is readily available to purchase.

The rose name honours Pierre de Ronsard (B.1524 – D.1585). Pierre de Ronsard was a famous French Poet whose 16th Century poetry earned a place in literary history. He enjoyed a great life: Well educated, well-travelled, highly productive, popular and he mixed socially, as friends, with royals such as King Charles of France, Queen Elizabeth I of England and Mary Queen of Scots. His own generation, in France, called him the “Prince of Poets”.

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Thursday, 5 January 2017

FFF267 - PINK CALLA LILY

Zantedeschia is a genus of herbaceous flowering plants in the family Araceae, native to southern Africa from South Africa north to Malawi. The name of the genus was given as a tribute to Italian botanist Giovanni Zantedeschi (1773–1846) by the German botanist Kurt Sprengel (1766–1833). Common names include arum lily for Z. aethiopica, calla, and calla lily for Z. elliottiana and Z. rehmannii although it is neither a true lily (Liliaceae), nor Arum or Calla (related genera in Araceae). It is also often erroneously spelled as "cala lily". It has often been used in many paintings, and is visible in many of Diego Rivera's works of art (see The Flower Vendor, amongst others).

The Zantedeschias are rhizomatous herbaceous perennial plants growing to 1-2.5 m tall with leaves 15–45 cm long. The inflorescence is a showy white, yellow or pink spathe shaped like a funnel with a yellow, central, finger-like spadix. The Zantedeschia species are poisonous due to the presence of calcium oxalate. All parts of the plant are toxic, and produce irritation and swelling of the mouth and throat, acute vomiting and diarrhoea. However, in some countries the leaves are sometimes cooked and eaten after suitable preparation.

Zantedeschia rehmannii Pink Calla Lily, shown here, has charming, funnel-shaped blooms that may be pink, rose, lavender or violet. It is a smaller plant (growing up to 40 cm) than the white or yellow varieties. Its long, tapered leaves are deep green, often with faint white spots.

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