Simpson desert

A virtually stemless, broadleaf-evergreen native of central and eastern North America: a basal rosette of rigid, sword-shaped, spine-tipped leaves up to 30 inches long, fringed along the margins with the curly white threads that give the species its name. In early summer a flowering stalk shoots from the center to 5 to 8 feet, carrying nodding, bell-shaped, creamy-white flowers. Tough enough for poor sandy soil, heat, drought, and salt spray, it earns its keep as architectural structure in dry and seaside gardens.

A tall, summer-growing cormous perennial from across sub-Saharan Africa, grown for arching spikes of large, hooded, orange-to-red-and-yellow flowers in summer over fans of sword-shaped leaves. This is the widespread wild African gladiolus and a key ancestor of the big garden gladioli. Unlike the winter-growing Cape bulbs, it is a SUMMER-GROWING corm: plant in spring, grow and flower through summer, then it dies back to a dormant corm for winter. It wants full sun, well-drained soil, and summer moisture, and is one of the hardier species gladioli - surviving to about USDA zone 7 with a deep winter mulch or by lifting the corms in cold-winter areas. The corms are toxic and irritant if eaten and have been used in traditional medicine, never as food. In the wild the hooded flowers are pollinated by sunbirds and long-tongued insects.

A bold, clump-forming evergreen perennial from South Africa, grown for big rounded umbels of trumpet-shaped blue (or white) flowers held on tall bare stalks above arching, strap-shaped leaves in mid-to-late summer. It is widely sold as "lily of the Nile," but that is a misnomer - the plant is South African (the Cape provinces and KwaZulu-Natal), not from the Nile. Spectacular and easy in warm climates, this evergreen Agapanthus is frost-tender, so in cold-winter areas it is grown in a container and overwintered under cover. The RHS has given several Agapanthus praecox forms its Award of Garden Merit and rates this evergreen species half-hardy (H3 - needs winter protection).

A tall, bold warm-season annual from Mexico and Guatemala (the "African" name is a misnomer of its European garden history) grown for large, fully double, pompon-like flowerheads in saturated yellow, gold, and orange over strongly aromatic, finely divided foliage. Plants reach 1 to 4 feet and bloom from early summer to frost in full sun. The petals are edible and used as a culinary garnish and natural dye, and the flowers are the iconic "flor de muerto" of Mexican Day of the Dead. Despite the wide listed zone range it is frost-tender and grown for a single warm season.

One of the world's most spectacular flowering trees and, in the same breath, one of its most dangerous invaders. Spathodea campanulata is a large, fast-growing tropical tree native to the moist forests of West and Central Africa (GBIF), carrying a dense crown of glossy compound leaves topped by showy, upturned clusters of big, frilly, scarlet-to-orange, tulip-shaped flowers (the boat-shaped buds hold water). It is glorious - and it is a serious invasive. The African tulip tree is listed among the IUCN "100 of the world's worst invasive species"; outside its native range it has overrun wet-tropical forests across the Pacific, Hawaii, the Caribbean, and parts of Asia and Australia, and its flowers can be lethal to native bees. Plant it ONLY where it is genuinely native or where it cannot escape, and first check that it is not prohibited locally - do not plant it in any tropical region where it can naturalise. It is frost-tender (USDA 10a-11), fast, and wants full sun and moisture; in cold-winter climates it is grown only as a tender container specimen kept frost-free. It is an ornamental, not a food plant.

Aji pepper is the South American chili species behind aji amarillo, Lemon Drop, Bishop's crown and Brazil's dedo-de-moça - one of the five domesticated chili peppers, and a different plant from the familiar garden pepper (Capsicum annuum) and the habanero (Capsicum chinense). It is a perennial shrub native from Colombia, Ecuador and Peru through Bolivia, Paraguay, Uruguay, northern Argentina and central and southern Brazil, and where it can live for years it grows taller than most garden peppers, up to about 6.6 feet. Its white to cream flowers are typically marked with green or gold, and its fruits, which usually hang down in cultivated forms, come in an unusually wide range of shapes, from long tapered pods to the crown-shaped Bishop's crown. Heat runs from nearly heatless types to hot ones; aji amarillo is rated around 30,000-50,000 Scoville units. It is frost tender, so outside nearly frost-free climates it is grown as a warm-weather annual.

Aloe vera is a succulent perennial grown almost everywhere as an easy houseplant: a low rosette of thick, fleshy, toothed, grey-green leaves filled with the clear gel it is famous for. POWO (Kew) gives its native range as the Arabian Peninsula, though the exact wild origin is uncertain after millennia of cultivation, and it is now grown worldwide as the familiar medicinal aloe. Indoors it wants bright light or a sunny windowsill and very infrequent watering - it is highly drought-tolerant and rots if overwatered, which is the single most common way to kill it. Its uses are genuinely nuanced: the clear inner leaf gel is widely applied to skin (minor burns) and is consumed in aloe juices and drinks, but the yellow latex just beneath the rind is a powerful laxative and irritant that should not be casually eaten (and is best avoided in pregnancy), and the whole plant is toxic to cats and dogs. It is frost-tender and hardy outdoors only in roughly USDA zones 9b-11; everywhere colder it lives in a pot. RHS gives it the Award of Garden Merit as an easy succulent houseplant and rates it H1C. Its air-purifying reputation, drawn from a single 1989 NASA chamber study, is negligible at realistic room densities - grow it for the plant itself, not to clean your air.

Hippeastrum x hybridum is a complex garden hybrid derived from six or more wild Hippeastrum species native to tropical and subtropical South America, developed through intensive breeding since the late 18th century and now the dominant "amaryllis" sold worldwide as a holiday bulb. It produces spectacular trumpet-shaped flowers - 5 to 8 inches across - on stout leafless scapes in red, pink, white, orange, salmon, or bicolour, making it one of the most dramatic winter-flowering houseplants available. The honest catch is toxicity: the entire plant, especially the bulb, contains lycorine and related alkaloids at concentrations that cause vomiting, salivation, tremors, and hypotension in pets and children, so it must be placed out of reach and handled with care.

American beautyberry (Callicarpa americana) is a loose, open, arching deciduous shrub of the southeastern and south-central United States, grown almost entirely for one spectacular autumn trick. Through summer it is a quiet green background plant, carrying small clusters of pink-to-lilac flowers tucked into the leaf axils. Then, from late summer into fall, those clusters ripen into tight whorls of vivid magenta-purple berries that wrap right around the stems at every leaf joint, so the arching branches look strung with beads. Songbirds strip them through fall and early winter. It is an easy, fast-growing, forgiving native that asks for little: full sun to part shade, ordinary well-drained soil, and room to arch. Site it where the fall berry show can be seen, because in leaf and flower it is plain, and in fruit it is one of the most distinctive shrubs you can grow.

Dierama pulcherrimum, angel's fishing rod, is an arching, more-or-less evergreen cormous perennial in the iris family (Iridaceae), endemic to the open summer-rainfall grasslands of the Eastern Cape of South Africa. It forms grassy tufts of long, narrow leaves from which tall, wiry, arching flower stems rise to about 4.9 feet (occasionally to 5.9 feet), each hung with pendulous, bell-shaped rosy-pink to purple flowers in summer - the namesake "fishing rod" silhouette over a pond or in a gravel garden. It is the load-bearing caution to note that this is only a borderline-hardy plant: RHS rates it H4 (hardy to roughly 14 to 23°F / USDA ~8b-9), so in colder zones it needs a sheltered, sunny, sharply drained spot, a winter mulch, or container/glasshouse protection, and it resents disturbance once established. It is not recorded as toxic - though it is grown purely as an ornamental and is not a food plant, so treat it as inedible. It is well-behaved (Least Concern in the wild, no recorded weediness) and suits borders, pond margins, and containers in mild-temperate gardens.

Angel's trumpet (Brugmansia suaveolens) is a large, soft-wooded shrub or small tree hung with enormous pendulous trumpet flowers - up to 12 inches long, white aging to soft blush, and intensely fragrant in the evening and at night. Native to the Atlantic Forest of south-eastern Brazil (POWO, Kew; Flora e Funga do Brasil), it is now classified Extinct in the Wild by the IUCN and survives only in cultivation, which makes a familiar garden plant quietly remarkable. It grows fast and thirsty in warmth (USDA zones 9b-11b) and is frost-tender, so in cold-winter areas it is grown in a large container and overwintered under cover. The load-bearing warning is its toxicity: EVERY PART IS HIGHLY TOXIC, loaded with tropane alkaloids (scopolamine, atropine, hyoscyamine), and poisonings can be severe or fatal - never plant it where children or pets could reach it.

Anise-scented sage is a tall, upright perennial in the mint family (Lamiaceae), native to Brazil, Paraguay, Uruguay, and Argentina. NC State Extension and Missouri Botanical Garden PlantFinder describe a bushy, square-stemmed plant 2 to 5 feet tall and wide that carries spikes of deep blue, two-lipped flowers with purple-blue calyxes from July into fall; NC State calls it a reliable nectar source for hummingbirds and butterflies, and notes that carpenter bees rob its nectar by biting a hole in the floral tube. The 'anise-scented' name is only partly earned: Wikipedia describes 'an anise scent when crushed,' but Missouri Botanical Garden PlantFinder says the bruised foliage has a very mild aroma with 'very little if any anise scent.' It spreads by tuberous roots that let it reproduce vegetatively (NC State Extension), so it fills a space rather than staying in a tidy clump. It is winter hardy only to about USDA zone 8a: farther north, grow it as an annual or overwinter cuttings indoors, though NC State notes the 'Black and Blue' cultivar is hardier and will survive milder zone 7 winters if well mulched. Neither NC State nor Missouri Botanical Garden documents an edible use or a toxicity hazard. NC State records, as ethnobotanical history, that the Guarani people of Brazil used it as a sedative; that is not a recommendation to take it, so treat it as a non-food ornamental. It has also naturalized outside South America (Wikipedia records it in New Zealand and Chile), so where winters are mild enough for it to persist outdoors, check your local weed or invasive-plant list before planting it.

A dwarf, evergreen Mediterranean sub-shrub with intensely aromatic silver-grey needle-like leaves and clusters of small, long-lasting yellow button flowers in summer. Native to the dry, rocky ground of the western and central Mediterranean basin, it is prized for its bold textural foliage and the illusion of a curry scent - although the plant has no culinary relationship to curry spice and its flavor largely disappears on cooking. The honest catch is hardiness: Helichrysum italicum is reliably winter-hardy only to about USDA Zone 8 (around 10°F); in colder climates it either dies outright or must be overwintered frost-free, and even within its range it is short-lived on heavy, wet soils where winter root rot claims it quickly.

A giant evergreen relative of the banana from coastal eastern South Africa, grown for its enormous, gray-green, paddle-shaped leaves and its dramatic white-and-blue, crane-like flowers. Honesty first: in frost-free climates (USDA zones 10a-11b) it forms a fan of multiple woody trunks and reaches 20 to 30 feet tall, with large bird-of-paradise blooms held in dark, boat-shaped bracts up in the canopy. It is frost-tender, so everywhere colder it is grown as a big container or indoor foliage plant - kept far smaller by the pot and rarely, if ever, flowering. The whole plant is a mild irritant if eaten, with the seeds more so, so it is best kept away from curious pets and children. It is grown above all for bold, tropical, architectural foliage rather than for its flowers in most gardens.

Japanese pittosporum is a dense, evergreen shrub native to warm-temperate and subtropical coastal forests of Japan, China, Taiwan, and Korea, prized for its leathery whorled foliage and intensely fragrant white flower clusters in spring. In suitable climates (USDA zones 8b-11) it is exceptionally tough - tolerating salt spray, drought, compacted soils, and heavy pruning - making it a staple of coastal landscapes, hedges, and mass plantings. The honest catch is twofold: it is frost-tender and will be killed or severely damaged below about 15°F, ruling it out for most of the continental US interior; and in mild Mediterranean-climate regions it escapes cultivation from bird-dispersed sticky seeds, where a Madrid study ranked it among the shrubs most associated with damage to native vegetation.

Jerusalem sage (Phlomis fruticosa) is an evergreen Mediterranean shrub grown for its bold foliage and its distinctive tiered flowers. Through spring and into early summer the stems carry whorl upon whorl of hooded, butter-yellow blooms stacked in neat tiers up the stem, set against sage-like, wrinkled, grey-green leaves that are softly felted with hairs. Despite the name it is not a true sage and is not culinary - it is grown purely as an ornamental. It is a tough, sun-loving, drought-tolerant shrub for hot, dry, sharply-drained places: gravel gardens, Mediterranean-style borders, and hot sunny banks. The honest caveat is that it resents wet, heavy soil and cold winters; it is only borderline hardy (RHS H4), so in cold-winter areas it needs a warm, sheltered spot and very sharp drainage to come through. Trim it lightly after flowering to keep it bushy and compact, leave the dried seedheads for winter structure, and enjoy it as the good bee plant it is.

Liriope muscari is an evergreen, grass-like perennial native to the shady forest understories of China, Japan, and Korea, where it grows at elevations of 330 to 4,600 feet. In gardens it forms dense, weed-suppressing clumps of arching dark-green foliage topped by spikes of lilac-purple flowers in late summer, followed by ornamental black berries - earning it the RHS Award of Garden Merit. It is drought-tolerant and remarkably adaptable, but the honest catch is its behaviour outside its native range: in parts of the eastern United States it is a documented invasive species, spreading by rhizomes and self-seeding into natural areas, and it provides minimal wildlife value compared with native groundcover alternatives.

Loquat is a medium evergreen tree in the rose family, native to the cooler hill regions of south-central China and cultivated for centuries across subtropical and mild-temperate climates worldwide. In the garden it offers year-round glossy foliage, sweetly fragrant autumn-to-winter flowers, and edible spring fruit - a rare sequence that fills an otherwise quiet ornamental gap. The honest catch is threefold: the seeds and young leaves contain cyanogenic glycosides (amygdalin) and must be kept away from children and pets; ripe fruit drop creates a slippery, fermenting mess beneath the canopy; and in zone 7 or the cooler edge of zone 8, an open-ground tree is likely to be defoliated or killed in a hard winter, and its autumn-winter flower buds lost, unless given wall shelter or reliable microclimate protection.

Mondo grass is a stoloniferous, evergreen perennial in the Asparagaceae (not a true grass despite its grass-like leaves), native to China, Japan, India, Nepal, and Vietnam, grown as a fine-textured, low groundcover that forms a dense, weed-suppressing turf of dark green foliage. It tolerates deep shade and dry spells once established, making it popular for difficult spots under trees and along pathways. The honest catch is its aggressive spread by underground stolons - in warm zones (8-10) it readily colonises beyond its intended boundary and needs hard edging - and its attractive metallic-blue berries contain steroidal saponins that are mildly toxic if eaten.

A spreading, rounded evergreen shrub from the southwestern Cape fynbos of South Africa, grown for flower heads that look exactly like brilliant orange, yellow, or red pincushions - a dome of nectar-rich flowers from which long curved styles project like pins - held over heart-based, blue-green leaves. It is one of the great Cape cut-flower exports and a Mediterranean-climate garden classic. Like the rest of the protea family it is phosphorus-sensitive: ordinary phosphate fertiliser or bone meal will kill it, because its cluster (proteoid) roots are adapted to nutrient-poor fynbos soils. It demands acidic, very sharply drained soil, full sun, and good air movement; it is drought-tolerant once established but rots in wet, rich, or limey ground, and it is frost-tender (RHS H3), so it grows outdoors only in warm, frost-free or Mediterranean climates and is a conservatory plant everywhere colder. In the wild the pincushion heads are worked for nectar by sunbirds and bees - it is chiefly bird-pollinated.

Star jasmine is an evergreen woody climbing vine native to eastern and southeastern Asia - Japan, Korea, southern China, and Vietnam - where it twines into forest margins and scrub. In gardens it is prized for intensely fragrant pinwheel-shaped white flowers in late spring to early summer and year-round glossy foliage, earning the RHS Award of Garden Merit. The honest catch is hardiness: it is reliable only in USDA zones 8-11 (the RHS rates it H4, roughly 14 to 23°F), so growers in zone 7 and colder face repeated dieback or outright loss in a hard winter, and in the warmest zones its vigour tips into aggressive coverage that can smother smaller plants.

The strawberry tree (Arbutus unedo) is a handsome evergreen of the heath family that earns its keep through one striking trick: in autumn it carries white, urn-shaped flowers and round, warty, red strawberry-like fruit on the plant at the same time, against dark glossy leaves and peeling red-brown bark. Native to the Mediterranean region and, unusually, western Ireland (POWO, Kew), it is a tough, drought- and lime-tolerant shrub or small tree for mild gardens - but only moderately cold-hardy (roughly USDA zone 7 and warmer), so it is not a plant for hard-winter areas. RHS gives it the Award of Garden Merit and rates it hardy in most of the UK in mild areas (H4). The fruit is edible but bland and mealy fresh - its name unedo, 'I eat one', is a fair warning - and is mostly used cooked for jams and liqueurs.

A long-lived epiphytic cactus from the Atlantic coastal forest of southeastern Brazil, grown indoors almost everywhere for its arching, segmented stems and its showy late-fall and winter flowers in hot pink, magenta, red, orange, salmon, or white. It is the plant most often sold and labeled as a 'Christmas cactus,' but the confusion is near-universal and worth getting right: this is the Thanksgiving, crab, or claw cactus, with sharp, claw-like teeth on the edges of its flat stem segments and a bloom season that runs from late fall into winter. The true Christmas cactus is a different plant, the hybrid Schlumbergera x buckleyi, which has smooth, rounded segment margins and blooms a few weeks later. Unlike a true desert cactus, it is a forest epiphyte that grows on tree branches in dappled light, so it wants bright indirect light, a free-draining mix, sparing water, and - to set its buds - cool nights and short days. A reassuring point that sets it apart from many houseplants: it is non-toxic to cats and dogs. The surest field mark is the pollen: Schlumbergera truncata has yellow pollen and asymmetric flowers held out nearly horizontally, where the true Christmas cactus (S. x buckleyi) has rose-pink pollen and more regular, pendent blooms.