PRICKLY PEAR

Opuntia, commonly called the prickly pear cactus, is a genus of flowering plants in the cactus family Cactaceae, many known for their flavourful fruit and showy flowers. Cacti are well-adapted to aridity; however, they are still vulnerable to alterations in precipitation and temperature driven by climate change.

Prickly pear alone is more commonly used to refer exclusively to the fruit, but may also be used for the plant itself; in addition, other names given to the plant and its specific parts include tuna (fruit), sabra, sabbar, nopal (pads, plural nopales) from the Nahuatl word nōpalli, nostle (fruit) from the Nahuatl word nōchtli, and paddle cactus. 

The genus is named for the Ancient Greek city of Opus, where, according to Theophrastus, an edible plant grew and could be propagated by rooting its leaves. The most common culinary species is the "Barbary fig" (Opuntia ficus-indica). 

The fruit of prickly pears, is edible, although it must be peeled carefully to remove the small spines on the outer skin before consumption. If the outer layer is not properly removed, glochids can be ingested, causing discomfort of the throat, lips, and tongue, as the small spines are easily lodged in the skin and mucous membranes. The young stem segments, usually called pads or nopales, are also edible in most species of Opuntia. They are commonly used in Mexican cuisine.

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SPARROW IN SALVIAS

Sparrow sitting pretty, in amongst red salvias. Salvia splendens, the scarlet sage or tropical sage, is a tender herbaceous perennial native to Brazil, growing at 2,000 to 3,000 m (6,600 to 9,800 ft) elevation where it is warm year-round and with high humidity. The wild form, rarely seen in cultivation, reaches 1.3 m tall. Smaller cultivars are very popular as bedding plants, seen in shopping malls and public gardens all over the world. The white-leaved plant is Senecio cineraria.

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HEUCHERA

Heuchera is a genus of largely evergreen perennial plants in the family Saxifragaceae, all native to North America. Common names include alumroot and coral bells.

Heuchera have palmately lobed leaves on long petioles, and a thick, woody rootstock. The genus was named after Johann Heinrich von Heucher (1677–1746), an 18th-century German physician, and Professor at Wittenberg University. There are approximately 37 species, but the taxonomy of the genus is difficult because the species often intergrade with one another, hybridization is common, and the flowers change markedly in proportion as they develop.

The majority of Heuchera sold for gardens are hybrids of H. americana, such as 'Green Spice'. Shown here is a Heuchera sanguinea hybrid called ‘Firefly Red’.

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RUDBECKIA 'OPHELIA'

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AZURE SAGE

Salvia azurea, the azure blue sage, azure sage, blue sage or prairie sage, is a herbaceous perennial in the genus Salvia, family Lamiaceae, that is native to Central and Eastern North America. Its thin, upright stems can grow to 1.8 m tall, with narrow, pointed, smooth-edged to serrated, furry to smooth green leaves, connected to their stems by petioles to 1.0 cm long. There are no basal leaves.

The blue (rarely white), flowers  nearly 6.4 to 12.7 mm long, appear summer to autumn near the ends of their branched or unbranched spikes; their calyxes are tubular or bell-shaped and furry. Two varieties are Salvia azurea var. azurea (azure sage) and Salvia azurea var. grandiflora (pitcher sage). It is found on the wild on roadsides, glades, fields and pastures.

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PETREA

Petrea is a genus of evergreen flowering vines native to Mexico and Central America. They have rough-textured leaves, hence the common name "sandpaper vine". It looks somewhat similar to a tropical Wisteria.

Shown here is Petrea volubilis. Carolus Linnaeus named Petrea in honour of Robert James Petre, 8th Baron Petre of Ingatestone Hall in Essex. Petre was a patron of botany.

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CHOCOLATE COSMOS

Cosmos atrosanguineus, the chocolate cosmos, is a species of Cosmos, native to Mexico, where it is extinct in the wild. The species was introduced into cultivation in 1902, where it survives as a single clone reproduced by vegetative propagation.

Cosmos atrosanguineus is a herbaceous perennial plant growing to 40–60 cm tall, with a fleshy tuberous root. The leaves are 7–15 cm long, pinnate, with leaflets 2–5 cm long. The flowers are produced in a capitulum 3-4.5 cm diameter, dark red to maroon-dark brown, with a ring of six to ten (usually eight) broad ray florets and a centre of disc florets typical of the Asteraceae family.

The flowers have a light vanillin fragrance (like many chocolates), which becomes more noticeable as the summer day wears on. The single surviving clone is a popular ornamental plant, grown for its rich dark red-brown flowers. It is not self-fertile, so no viable seeds are produced, and the plant has to be propagated by division of the tubers, or by tissue culture.

It requires partial sun or full sun, and flowers from mid- to late summer. It is frost-sensitive (Zones 6-11); in temperate zones, the tuber has to be dug up and stored in a frost-free store over the winter.

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SUNFLOWERS

Helianthus or sunflowers (from the Greek: ήλιος, Hēlios, "sun" and ανθός, anthos, "flower") is a genus of plants comprising about 70 species in the family Asteraceae. The genus is one of many in the Asteraceae that are known as sunflowers. Except for three species in South America, all Helianthus species are native to North America. The common name, "sunflower", typically refers to the popular annual species 

Helianthus annuus, the common sunflower (shown here), whose round flower heads in combination with the ligules look like the sun. This and other species, notably Jerusalem artichoke (H. tuberosus), are cultivated in temperate regions as food crops and ornamental plants. The largest sunflower field is located in Tuscany, Italy. The domesticated sunflower, H. annuus, is the most familiar species.

Perennial sunflower species are not as popular for gardens due to their tendency to spread rapidly and become invasive. Whorled sunflowers, H. verticillatus, were listed as an endangered species in 2014 when the U.S. Fish and Wildlife Service issued a final rule protecting it under the Endangered Species Act. The primary threats are industrial forestry and pine plantations in Alabama, Georgia, and Tennessee. They grow to 1.8 m and are primarily found in woodlands, adjacent to creeks and moist, prairie-like areas.

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PERUVIAN LILY

Alstroemeria, commonly called the Peruvian lily or lily of the Incas, is a genus of flowering plants in the family Alstroemeriaceae. They are all native to South America although some have become naturalised in the United States, Mexico, Australia, New Zealand, Madeira and the Canary Islands. Almost all of the species are restricted to one of two distinct centres of diversity, one in central Chile, the other in eastern Brazil. Species of Alstroemeria from Chile are winter-growing plants while those of Brazil are summer-growing. All are long-lived perennials except A. graminea, a diminutive annual from the Atacama Desert of Chile.

The genus was named after the Swedish baron Clas Alströmer (1736 – 1794) by his close friend Carolus Linnaeus. Many hybrids and at least 190 cultivars have been developed, featuring many different markings and colours, including white, yellow, orange, apricot, pink, red, purple, and lavender. The most popular and showy hybrids commonly grown today result from crosses between species from Chile (winter-growing) with species from Brazil (summer-growing). This strategy has overcome the florists' problem of seasonal dormancy and resulted in plants that are evergreen, or nearly so, and flower for most of the year. This breeding work derives mainly from trials that began in the United States in the 1980s.

The flower, which resembles a miniature lily, is very popular for bouquets and flower arrangements in the commercial cut flower trade. Most cultivars available for the home garden will bloom in the late spring and early summer. The roots are hardy to a temperature of −5 °C. The plant requires at least six hours of morning sunlight, regular water, and well-drained soil.

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PANSY ORCHID

Miltonia, abbreviated Milt. in the horticultural trade, is an orchid genus formed by nine epiphyte species and eight natural hybrids inhabitants of the Brazilian Atlantic Forest, one species reaching the northeast of Argentina and east of Paraguay. This genus was established by John Lindley in 1837, when he described its type species, Miltonia spectabilis. Many species were attributed to Miltonia in the past, however, today, the species from Central America and from cooler areas on northwest of South America have been moved to other genera.

Miltonia species have large and long lasting flowers, often in multifloral inflorescences. This fact, allied to being species that are easy to grow and to identify, make them a favourite of orchid collectors all over the world. Species of this genus are extensively used to produce artificial hybrids. Despite the fact that Miltonia is now a well established genus, most of its species were originally classified under other genera as Cyrtochilum, Oncidium, Odontoglossum, and Brassia. All were discovered between 1834 and 1850 with the exception of M. kayasimae, discovered only in 1976. 

These epiphytic orchids occur from Central to Southern Brazil down to Argentina. They are named after Charles Wentworth-Fitzwilliam, 5th Earl Fitzwilliam, formerly Viscount Milton, an English orchid enthusiast. These orchids have two leaves, arising from a pseudobulbs, covered with a foliaceous sheath. The inflorescence consists of waxy, nonspurred flowers. The lip is large and flat and lacks a callus at its base. They possess a footless column with two hard pollinia. The flowers have a delicate, exotic scent, some compare to that of roses. The species in this genus are sometimes referred to as the "pansy orchids", but it is the Miltoniopsis orchids that have flowers that closely resemble the pansy. Almost everyone except for the most serious orchid hobbyists use the name pansy orchids interchangeably, which may cause confusion.

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BUDDLEJA

Buddleja commonly known as the butterfly bush is a genus comprising over 100 species of flowering plants endemic to Asia, Africa, and the Americas, within the Buddlejaceae family. The generic name bestowed by Linnaeus posthumously honoured the Reverend Adam Buddle (1662–1715), a botanist and rector in Essex, England, at the suggestion of Dr. William Houstoun. Houstoun sent the first plants to become known to science as Buddleja (B. americana) to England from the Caribbean about 15 years after Buddle's death.

As garden shrubs Buddleja is essentially a 20th-century plant, with the exception of B. globosa which was introduced to Britain from southern Chile in 1774 and disseminated from the nursery of Lee and Kennedy, Hammersmith. Several species are popular garden plants, the species are commonly known as 'butterfly bushes' owing to their attractiveness to butterflies, and have become staples of the modern butterfly garden; they are also attractive to bees and moths. The most popular cultivated species is Buddleja davidii from central China, named for the French Basque missionary and naturalist Père Armand David.

This bush is flowering prematurely, misled perhaps by the fine, warm days we enjoyed before the cold, wet, stormy, wintry front that hit us two days ago.

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JACOBINIA

A member of the Acanthaceae family, the Brazilian plume flower or jacobinia (Justicia carnea) is a shade-loving, soft-wooded shrub (ht 1.5m) with large, lush leaves. Thick plumes of white, pale pink or deep pink tubular flowers appear in regular flushes from early summer to late autumn. A form with dark purplish underleaves is known as 'Radiant' - perhaps more correctly should be called 'Huntington Form'.

Justicia carnea needs hard pruning in late winter, and regular dead-heading during summer will help to promote new blooms. It will also flourish in sunny spots but is useful for shaded sites, as are so many of the Acanthaceae family, which do so well in temperate climates. Whilst it will stand neglect, it responds well to feeding and watering. It is easily propagated from cuttings. It is a good companion to hydrangeas, Plectranthus species, ferns and camellias. The white form looks pretty with silver-leaved companions, such as Plectranthus argentatus and Pilea cadierei.

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SNOW-ON-THE-MOUNTAIN

Euphorbia marginata (commonly known as snow-on-the-mountain, smoke-on-the-prairie, variegated spurge, or whitemargined spurge) is a small annual in the spurge family, Euphorbiaceae. It is native to parts of temperate North America, from Eastern Canada to the Southwestern United States. It is naturalized throughout much of China. The type specimen was collected in Rosebud County, Montana from the area of the Yellowstone River by William Clark during the Lewis and Clark Expedition.

Snow-on-the-mountain has grey-green leaves along branches and smaller leaves (bracts or cyathophylls) in terminal whorls with edges trimmed with wide white bands, creating, together with the white flowers, the appearance that gives the plant its common names.

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TURNERA

Turnera subulata is a species of flowering plant in the Passifloraceae family known by the common names white buttercup, sulphur alder, politician's flower, dark-eyed turnera, and white alder. Despite its names, it is not related to the buttercups or the alders. It is native to Central and South America, from Panama south to Brazil. It is well known in many other places as an introduced species, such as Malaysia, Indonesia, several other Pacific Islands, the Caribbean, and Florida in the United States. It is commonly cultivated as a garden flower.

This plant is a perennial herb growing from a thick taproot and woody stem base. It reaches a maximum height around 80 cm. The leaves are roughly oval in shape with toothed edges. The undersides are glandular and coated in white hairs. The upper surfaces may be somewhat hairy, as well. The leaves are up to 9 cm long. Flowers occur in the leaf axils, borne in calyces of hairy, glandular sepals. The petals are rounded to oval, the longest exceeding 3 cm. They are white or yellowish with darker bases. The dark patches at the bases are nectar guides. The centre of the flower is rough, said to feel like a cat's tongue. The fruit is a hairy capsule containing seeds with white arils. The seeds are dispersed by ants, who are likely attracted to their high lipid content. 

This plant has uses in traditional medicine. It is used for skin, gastrointestinal, and respiratory ailments. In Brazil, the plant is made into cough syrup, and the roots are said to be good for dysmenorrhea. Laboratory tests showed it has some inhibitory activity against various fungi, such as Candida glabrata, Aspergillus flavus, A. niger, A. fumigatus, Penicillium chrysogenum, and Candida albicans.

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TWEEDIA

Oxypetalum coeruleum is a species of flowering plant, native to South America from southern Brazil to Uruguay, in the Apocynaceae family. The synonymous name Tweedia caerulea is also used. Growing to 100 cm, it is a straggling evergreen perennial with heart shaped, gray-green, downy leaves. It is grown for its clear pale blue, star-shaped flowers, which are long lasting and cut well.

The summer flowers age to purple and are followed by 30 cm long, boat-shaped seed pods. The seeds have downy parachute-like tufts (cypsela). The cultivar 'Alba' has white flowers, while 'Rosea' has pink flowers. Oxypetalum coeruleum requires full sun in a well-drained soil that is dry. Propagation is via seed. With a minimum temperature range of 3–5 °C,  it can be grown outdoors in a frost-free, sheltered environment. Alternatively it can be grown as an annual. This plant has gained the Royal Horticultural Society's Award of Garden Merit.

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POLEMONIUM

Attractive, dense ferny foliage makes Polemonium pulcherrimum 'Blue Dove' (also known as Jacob's ladder) a valuable plant for all year round interest in the garden. As an added bonus loose sprays of open bell shaped flowers in a soft shade of blue can appear from spring right through to and including autumn. Its 'lacy' appearance makes it a useful plant for softening hard lines and edges created by rocks, garden edging or paving.

Polemonium is a genus comprising of around 30 species of mostly perennial herbs which are native to regions of North and Central America, Europe and Asia. An excellent plant for general garden use and suitable for most colour schemes. 'Blue Dove' looks particularly at home in woodland type settings or in the cottage garden. It may be grown in semi shade although this may decrease flower production. This, however, is not necessarily a reason to avoid planting it in such locations as the attractive foliage alone will lend a visual appeal to these often difficult landscaping zones. To accent the foliage further create a foil of foliage behind it using larger, broader leafed plants or those with tall slender foliage such as that of Irises.

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CUPHEA

Cuphea is a genus containing about 260 species of annual and perennial flowering plants native to warm temperate to tropical regions of the Americas. The species range from low-growing herbaceous plants to semi-woody shrubs up to 2 m tall. Commonly they are known as cupheas, or, in the case of some species, as cigar plants. The generic name is derived from the Greek word κυφος (kyphos), meaning "bent," "curved," or "humped."

Several Cuphea species are popular ornamental plants or honey plants. C. ignea 'David Verity' and C. micropetalia are popular plants to attract hummingbirds. Cuphea vienco (shown here) are charming, free-flowering plants with small, smooth green leaves smothered with frilly, vibrant red and purple flowers. Suitable for pots and mixed containers. Bird attracting. The plant copes well in dry conditions. Suitable for full sun or part shade positions. Grows up to 60cm high.

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MAGNOLIA & BEE

Magnolia grandiflora, commonly known as the southern magnolia or bull bay, is a tree of the family Magnoliaceae native to the southeastern United States, from Virginia south to central Florida, and west to eastern Texas and Oklahoma. Some trees have been viewed as far west as New Mexico and California. Reaching 27.5 m in height, it is a large striking evergreen tree with large dark green leaves and large white fragrant flowers. Widely cultivated around the world, over a hundred cultivars have been bred and marketed commercially. The timber is hard and heavy, and has been used commercially to make furniture, pallets, and veneer.

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AMAZON LILY

Victoria amazonica is a species of flowering plant, the largest of the Nymphaeaceae family of water lilies. It is the National flower of Guyana. The species has very large leaves, up to 3 m in diameter, that float on the water's surface on a submerged stalk, 7–8 m in length. The species was once called Victoria regia after Queen Victoria, but the name was superseded.

V. amazonica is native to the shallow waters of the Amazon River basin, such as oxbow lakes and bayous. It is depicted in the Guyanese coat of arms. The flowers are white the first night they are open and become pink the second night. They are up to 40 cm in diameter, and are pollinated by beetles. This process was described in detail by Sir Ghillean Prance and Jorge Arius. It is the largest waterlily in the world.

The spectacular flowers are relatively short-lived, lasting only 48 hours or so. The flower is white the first evening it opens, attracting beetles with a sweet pineapple-like scent and with heat from a thermochemical reaction. At this stage the flower is female, and is open to receiving pollen picked up by the beetles on other plants. As they bumble around inside the flower they transfer pollen to the stigmas and fertilisation takes place. Meanwhile the flower shuts, trapping them until the next evening.

During the following day the plant changes from female to male: The anthers mature and start producing pollen. When the flower reopens on the second evening it has changed colour to purplish red and no longer emits attractive scent or heat. The beetles, dusted with their pollen, fly off to find another white flower on a different plant (each plant only ever has one white flower at a time), where the process is repeated. The flower then closes up and sinks below the surface of the water, its mission accomplished.

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HIPPEASTRUM

Hippeastrum is a genus of about 90 species and 600+ hybrids and cultivars of bulbous plants in the family Amaryllidaceae, subfamily Amaryllidoideae, native to tropical and subtropical regions of the Americas from Argentina north to Mexico and the Caribbean. Some species are grown for their large showy flowers.

For many years there was confusion amongst botanists over the generic names Amaryllis and Hippeastrum, one result of which is that the common name "amaryllis" is mainly used for cultivars of this genus, which are widely used as indoor flowering bulbs. The generic name Amaryllis applies to bulbs from South Africa, usually grown outdoors.

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