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Showing posts with label toxic. Show all posts
Showing posts with label toxic. Show all posts

Thursday, 5 June 2025

FFF702 - HELLEBORE

Helleborus niger, commonly called Christmas rose or black hellebore, is an evergreen perennial flowering plant in the buttercup family, Ranunculaceae. It is poisonous. Although the flowers resemble wild roses (and despite its common name), Christmas rose does not belong to the rose family (Rosaceae).
The plant is a traditional cottage garden favourite because it flowers in the depths of winter. Large-flowered cultivars are available, as are pink-flowered and double-flowered selections. It has been awarded an Award of Garden Merit (AGM). 
Hellebores provide stunning results when mass planted in shady areas of the garden. It can be difficult to grow well; acid soil is unsuitable, as are poor, dry conditions and full sun. Moist, humus-rich, alkaline soil in dappled shade is preferable. Leaf-mould can be dug in to improve heavy clay or light sandy soils; lime can be added to 'sweeten' acid soils.

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Thursday, 1 May 2025

FFF697 - HYDRANGEA PANICULATA 'CANDLELIGHT'

Hydrangea paniculata 'Candlelight' is a new hybrid, which  produces conical, creamy white flowers on deep red stems for an impressive and unforgettable visual display. As the flowers age they gently change to shades of pale and deeper pinks. ‘Candlelight’ is an elegant, yet extremely hardy shrub with strong stems ensuring that flowers are held proudly upright from later summer through to the autumn season.

Summer watering is encouraged through dry periods to gain maximum flower size and impact. Moderate water requirements when in flower. Prune back old flowers in late winter to encourage new growth in spring. Note that this plant is harmful if eaten and is also a skin and eye irritant.

This shrub is perfect for creating a standout display in your garden, or it can be grown in large containers for added versatility. Its lush green foliage changes into beautiful autumn tones, making it a highlight of any garden. In addition to its stunning appearance, the Hydrangea Paniculata 'Candlelight' is also a great choice for attracting bees and other pollinators to your garden. As the flowers age and change colour, they continue to provide a valuable source of nectar for these important creatures.

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Thursday, 10 April 2025

FFF694 - OLEANDER

Nerium oleander, most commonly known as oleander, is a shrub or small tree in the dogbane family Apocynaceae, cultivated worldwide in temperate and subtropical areas as an ornamental and landscaping plant. It is the only species currently classified in the genus Nerium. It is so widely cultivated that no precise region of origin has been identified, though it is usually associated with the Mediterranean Basin.

Nerium grows to 2–6 m tall. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. It is tolerant to both drought and inundation, but not to prolonged frost. White, pink or red five-lobed flowers grow in clusters year-round, peaking during the summer. The fruit is a long narrow pair of follicles, which splits open at maturity to release numerous downy seeds.

Several compounds in nerium exhibit toxicity, and it has historically been considered a poisonous plant. However, its bitterness renders it unpalatable to humans and most animals, so poisoning cases are rare and the general risk for human mortality is low. Ingestion of larger amounts may cause nausea, vomiting, excess salivation, abdominal pain, bloody diarrhoea and irregular heart rhythm. Prolonged contact with sap may cause skin irritation, eye inflammation and dermatitis.

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Thursday, 1 August 2024

FFF658 - ADONIS

Adonis aestivalis, the summer pheasant's-eye, is a medicinal and ornamental plant. It is native to Europe and Asia but has been introduced elsewhere, such as the western and eastern parts of the United States, as an ornamental plant. In particular, it has been known to invade alfalfa fields, contaminating feed used for horse hay. It is a member of the buttercup family, Ranunculaceae.

It is an annual herb that grows up to 1 m tall. The stems are erect with simple, pinnately-dissected, alternate leaves and a small, terminal flower. The flowers are perfect. The radially symmetrical flowers are an orange to red colour, and each petal has a black splotch at its base. Its petals curl to form a cup-like shape. The fruit is an achene. A single flower can produce 50 to 100 seeds.

A. aestivalis has been used in European folk medicine to treat weak hearts by stimulating cardiac activity. The plant is dried out and combined with some water to form a tonic. It can be toxic at large doses, causing paralysis of the heart muscles. It is also used to treat coughs and spasms and as a diuretic and sleeping aid. It has also been used in Iran to treat rheumatism and heart disease.

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Thursday, 8 July 2021

FFF500 - STAR ANISE

Illicium anisatum, commonly known as the Japanese star anise, is a tree similar to Chinese star anise. It is highly toxic, therefore it is not edible; instead, it has been burned as incense in Japan, where it is known as shikimi. Cases of illness, including serious neurological effects such as seizures, reported after using star anise tea may be a result of using this species.

I. anisatum is native to Japan. It is similar to I. verum, but its fruit is smaller and with weaker odour, which is said to be more similar to cardamom than to anise. While it is poisonous and therefore unsuitable for using internally, it is used for treatment of some skin problems in traditional Chinese medicine.

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Thursday, 29 April 2021

FFF491 - ANGELS' TRUMPETS

Brugmansia is a genus of seven species of flowering plants in the family Solanaceae. They are woody trees or shrubs, with pendulous flowers, and have no spines on their fruit. Their large, fragrant flowers give them their common name of angel's trumpets, a name sometimes used for the closely related genus Datura. (Datura differ from Brugmansia in that they are herbaceous perennials, with erect or nodding, rather than pendulous, flowers - and usually spiny fruit).

Brugmansia species are amongst the most toxic of ornamental plants, containing tropane alkaloids of the type also responsible for the toxicity and deliriant effects of both jimsonweed and the infamous deadly nightshade.

All seven species are known only in cultivation or as escapees from cultivation, and no wild plants have ever been confirmed. They are therefore listed as 'Extinct in the Wild' by the IUCN Red List, although they are popular ornamental plants and still exist wild outside their native range as introduced species. It is suspected that their extinction in the wild is due to the extinction of some animal which previously dispersed the seeds, with human cultivation having ensured the genus's continued survival.

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Thursday, 26 November 2020

FFF469 - OLEANDER

Nerium oleander, most commonly known as nerium or oleander, is a shrub or small tree in the dogbane family Apocynaceae, cultivated worldwide in temperate and subtropical areas as an ornamental and landscaping plant. It is the only species currently classified in the genus Nerium. It is so widely cultivated that no precise region of origin has been identified, though it is usually associated with the Mediterranean Basin.

Nerium grows to 2–6 m (7–20 ft) tall. It is most commonly grown in its natural shrub form, but can be trained into a small tree with a single trunk. It is tolerant to both drought and inundation, but not to prolonged frost. White, pink or red five-lobed flowers grow in clusters year-round, peaking during the summer. The fruit is a long narrow pair of follicles, which splits open at maturity to release numerous downy seeds.

Several compounds in nerium exhibit toxicity, and it has historically been considered a poisonous plant. However, its bitterness renders it unpalatable to humans and most animals, so poisoning cases are rare and the general risk for human mortality is low. Ingestion of larger amounts may cause nausea, vomiting, excess salivation, abdominal pain, bloody diarrhoea and irregular heart rhythm. Prolonged contact with sap may cause skin irritation, eye inflammation and dermatitis.

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Thursday, 10 September 2020

FFF 458 - ADENIUM

Adenium obesum is a species of flowering plant in the dogbane family, Apocynaceae, that is native to the Sahel regions, south of the Sahara (from Mauritania and Senegal to Sudan), and tropical and subtropical eastern and southern Africa and Arabia. Common names include Sabi star, kudu, mock azalea, impala lily and desert rose.

It is an evergreen or drought-deciduous succulent shrub (which can also lose its leaves during cold spells, or according to the subspecies or cultivar). It can grow to 1–3 m in height, with pachycaul stems and a stout, swollen basal caudex. The leaves are spirally arranged, clustered toward the tips of the shoots, simple entire, leathery in texture, 5–15 cm long and 1–8 cm broad. The flowers are tubular, 2–5 cm long, with the outer portion 4–6 cm diameter with five petals, resembling those of other related genera such as Plumeria and Nerium. The flowers tend to red and pink, often with a whitish blush outward of the throat.

Adenium obesum is a popular houseplant and bonsai in temperate regions. It requires a sunny location and a minimum indoor temperature in winter of 10 °C. It thrives on a xeric watering regime as required by cacti. A. obesum is typically propagated by seed or stem cuttings. The numerous hybrids are propagated mainly by grafting on to seedling rootstock. While plants grown from seed are more likely to have the swollen caudex at a young age, with time many cutting-grown plants cannot be distinguished from seedlings. This plant has gained the Royal Horticultural Society's Award of Garden Merit. The toxic sap of its roots and stems is used as arrow poison for hunting large game throughout much of Africa, and as a fish toxin.

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Thursday, 27 December 2018

FFF370 - IVY FLOWERS

Hedera helix (common ivy, English ivy, European ivy, or just ivy) is a species of flowering plant in the family Araliaceae, native to most of Europe and western Asia. A rampant, clinging evergreen vine, it is a familiar sight in gardens, waste spaces, on house walls, tree trunks and in wild areas across its native habitat. It is labeled as an invasive species in a number of areas where it has been introduced.

The flowers are produced from late summer until late autumn, individually small, in 3-to-5 cm-diameter umbels, greenish-yellow, and very rich in nectar, an important late autumn food source for bees and other insects. The fruit are purple-black to orange-yellow berries 6–8 mm in diameter, ripening in late winter, and are an important food for many birds, though somewhat poisonous to humans. One to five seeds are in each berry, which are dispersed after being eaten by birds.

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BEST WISHES TO EVERYONE FOR THE FESTIVE SEASON!
MAY THE NEW YEAR 2019 BE FULL OF HEALTH, HAPPINESS AND REPLETE WITH FLOWERS!

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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Add your own Flower photos on the linky list below and please visit other people's blogs to see their contributions. I appreciate your linking up and enjoy personally seeing your great photos, however, due to work-related pressures I may have not commented lately - I shall endeavour to do so ASAP!


Thursday, 27 October 2016

FFF257 - KANGAROO APPLE

Solanum is the type genus of the family Solanaceae, which contains such well-known economic plants as the potato, tomato, tobacco, egg plant (aubergine) and many more. In Australia there are 117 species, of which 87 are endemic.  Solanum laciniatum or Kangaroo Apple, a common name shared with the closely related S. aviculare, occurs in temperate regions of New South Wales, the Australian Capital Territory, Victoria, South Australia, Tasmania, New Zealand and associated islands on a range of soil types. It forms a large shrub 4 m high by 5 m wide.

Solanum laciniatum produces two types of foliage: Large lance-shaped or irregularly lobed juvenile leaves 300 mm long by 250 mm wide and smaller generally entire lance-shaped adult leaves 150 mm long by about 30-50 mm wide. Both types of leaf are a rich dark green on the upper surface, and a lighter green underneath, with conspicuous veins. They are held on dark green succulent stems, which turn black, then a rough light-brown, with age.

The five-petalled flowers are 30-50 mm across, bluish-purple, with bright yellow anthers. The flowers appear spasmodically in spring and summer in clusters of 3-5 in the leaf axils. The egg-shaped berries, 20-30 mm long, begin green and small when unripe and then become a bright orange-yellow with a warty appearance when ripe. The berries are poisonous while green, but edible once orange (then called the 'bush tomato'). The plant is also used as a rootstock for grafting eggplant.

Solanum laciniatum has been cultivated at the Australian National Botanic Gardens since 1969, with no frost damage or major pest or disease problems apparent. As a fast-growing species, hardy in most soil types and conditions, except salt spray, S. laciniatum is ideally suited as a screen plant, in the understorey of a wind break, or for bank and erosion stabilisation. It has also been used in soils with a high concentration of heavy metals when reclaiming mine wastes. For the home gardener S. laciniatum is ideal as a quick growing screen plant, while slower shrubs are establishing.

Since the mid 1960s S. laciniatum and S. aviculare have been cultivated and studied in the USSR, NZ, India, Egypt and other countries. The plants, and in particular the young foliage and green berries, contain a series of steroids (including the toxic alkaloid solasodine), which are of commercial value as raw material for the manufacture of contraceptives.

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Thursday, 15 September 2016

FFF252 - DIEFFENBACHIA

Dieffenbachia is a genus of tropical flowering plants in the family Araceae. It is native to the New World Tropics from Mexico and the West Indies south to Argentina. It is widely cultivated as an ornamental, especially as a house plant, and has become naturalised on a few tropical islands. Dieffenbachia prefers medium sunlight, moderately dry soil and average home temperatures of 17–27 °C. Indoors it should be watered about twice a week.

Dieffenbachia is a perennial herbaceous plant with straight stem, simple and alternate leaves containing white spots and flecks, making it attractive as indoor foliage. Species in this genus are popular as houseplants because of their tolerance of shade. The flowers are green/white and have the typical spathe of arums. The common name, "dumb canes" refers to the poisoning effect of raphides, which can cause temporary inability to speak.

Dieffenbachia was named by Heinrich Wilhelm Schott, director of the Botanical Gardens in Vienna to honour his head gardener Joseph Dieffenbach (1796–1863).

With a minimum temperature tolerance of +5 °C, Dieffenbachia must be grown indoors in temperate areas. They need light, but filtered sunlight through a window is usually sufficient. They also need moderately moist soil, which should be regularly fertilised with a proprietary houseplant fertiliser. Leaves will periodically roll up and fall off to make way for new leaves. Yellowing of the leaves is generally a sign of problematic conditions, such as a nutrient deficiency in the soil. Dieffenbachia respond well to hot temperatures and dry climates.

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Thursday, 17 December 2015

FFF213 - FRANGIPANI

Plumeria is a genus of flowering plants in the dogbane family, Apocynaceae. It contains primarily deciduous shrubs and small trees. They are native to Central America, Mexico, the Caribbean, and South America as far south as Brazil but can be grown in tropical and sub-tropical regions.

Plumeria is related to the Oleander, Nerium oleander, and both possess an irritant, rather similar to that of Euphorbia. Contact with the sap may irritate eyes and skin. Each of the separate species of Plumeria bears differently shaped, alternate leaves with distinct form and growth habits. The leaves of P. alba are quite narrow and corrugated, whereas leaves of P. pudica have an elongated shape and glossy, dark-green colour. P. pudica is one of the everblooming types with non-deciduous, evergreen leaves. Another species that retains leaves and flowers in winter is P. obtusa; though its common name is "Singapore," it is originally from Colombia.

Plumeria flowers are most fragrant at night in order to lure sphinx moths to pollinate them. The flowers have no nectar, however, and simply dupe their pollinators. The moths inadvertently pollinate them by transferring pollen from flower to flower in their fruitless search for nectar.

Plumeria species may be propagated easily from cuttings of leafless stem tips in spring. Cuttings are allowed to dry at the base before planting in well-drained soil. Cuttings are particularly susceptible to rot in moist soil. In order to get the most from a plumeria plant with respect to growth, size, blooms, and scent, there is a fine balance that must be maintained. Ideally, a plumeria is in its element when it can have plenty of sun and appropriate water, so as to maintain soil moistness just above a state of dryness. On the other hand, if the plant receives a lesser amount of sun, then a lesser amount of watering is necessary - again, to ensure that soil moistness stays just above the dry state. The more sun, the more water. The less sun, the less water. A common mistake of novice plumeria growers is to overwater the plant when it is not able to be exposed to enough sun, thereby resulting in a rotted root system. Conversely, if a plumeria plant is able to receive maximum exposure to the sun, but they aren't watered enough, the plant will die.

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Thursday, 27 August 2015

FFF197 - JONQUILS

Narcissus jonquilla (Jonquil, Rush daffodil) is a bulbous flowering plant, a species of Narcissus (daffodil) that is native to southwestern Europe and northern Africa, but has naturalised throughout Europe and the United States. It bears long, narrow, rush-like leaves (hence the name "jonquil", Spanish junquillo, from the Latin juncus = "rush"). It is in the Amaryllidaceae family of plants.

In Spring it bears heads of up to 5 scented yellow or white flowers. It is a parent of numerous varieties within Division 7 of the horticultural classification. Division 7 in the Royal Horticultural Society classification of Narcissus includes N. jonquilla and N. apodanthus hybrids and cultivars that show clear characteristics of those two species. N. jonquilla has been cultivated since the 18th century in France as the strongest of the Narcissus species used in Narcissus Oil, a component of many modern perfumes.

Like other members of their family, narcissi produce a number of different alkaloids, which provide some protection for the plant, but may be poisonous if accidentally ingested. This property has been exploited for medicinal use in traditional healing and has resulted in the production of galantamine for the treatment of Alzheimer's dementia.

We are seeing all sorts of narcissi blooming in Melbourne at the moment, a clear indication of Spring's imminent arrival!

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Thursday, 30 April 2015

FFF180 - DELPHINIUM 'BLUE MIRROR'

Delphinium is a genus of about 300 species of perennial flowering plants in the family Ranunculaceae, native throughout the Northern Hemisphere and also on the high mountains of tropical Africa. All members of the Delphinium genus are toxic to humans and livestock. The common name "larkspur" is shared between perennial Delphinium species and annual species of the genus Consolida. The name "delphinium" derives from the Latin for "dolphin", referring to the shape of the nectary.

Delphinium grandiflorum ‘Blue Mirror’ shown here, is a dwarf delphinium, very different from the traditional tall spiky delphiniums. This cultivar forms a low, bushy mound of lacy green leaves. Plants bear loose sprays of single electric-blue flowers throughout the summer. Ideal for containers, the rock garden and for edging the sunny border. Remove faded flower heads regularly to encourage repeat blooming. Although not a long-lived perennial, this will often self-sow where happy. Said to be tolerant of hot, humid summer climates. Also known to do remarkably well in areas with short, cool summers. An outstanding cut flower, lasting a week in a vase.

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