'Waterloo Sunset' has fragrant, glowing magenta, double dianthus flowers on blue foliage.

Dianthus Fruit Punch 'Black Cherry Frost' has fragrant, semi-double, red flowers with serrated white to pink picotee edges.

Dianthus Fruit Punch 'Spiked Punch' has fragrant, fully-double, raspberry-pink flowers with heavily fringed petals and silver-blue foliage.

Dianthus 'Appleblossom Burst' has fragrant, heavily ruffled, double flowers in white gradually deepening through various pinks.

Dicksonia antarctica, the Tasmanian tree fern, is an impressive specimen and one of the oldest plants in the world.

Dierama dracomontanum is a compact species with showers of bell-shaped, salmony pink flowers in great numbers in summer.

Dierama igneum has showers of bell-shaped flowers deeply dissected into lobes in shades of magenta-red to tomato-red.

Dierama medium is an angel's fishing rod, also called lilac hairbell, with lovely bell-shaped purple to lilac flowers.

Dierama pauciflorum is a dwarf species with upright stems blooming in spring with magenta flowers long before other species.

Angel's fishing rod, Dierama pulcherrimum, is a stunning, long-lived perennial with perfectly formed bells in purple and magenta.

The Dierama Plantworld Jewels produce showers of perfectly formed bells in shades of white, lavender, purple, burgundy, and rose-red.

Dietes vegeta is an iris-like plant with narrow blades of foliage and white flowers accented with yellow and purple.

Digiplexis 'Berry Canary' has hot pink foxglove-like, tubular flowers with creamy yellow throats.

Digiplexis 'Firecracker' is a foxglove hybrid with orange-yellow flowers with rosy overtones and gray-green foliage.

Digiplexis Illumination 'Apricot' has gorgeous tubular flowers of light apricot-orange and warm yellow.

Digiplexis Illumination 'Flame' is like a foxglove crossed with a Hawaiian shirt with amazing colours of apricot-orange and reddish-magenta!

Digiplexis Illumination 'Raspberry' Improved has magenta-red flowers that bloom for months.

Digiplexis 'Rising Phoenix' is a sterile foxglove with tubular flowers of rosy-pink and light apricot hues on tall spires.

Digitalis obscura is a unique foxglove with red and orange flowers.

A unique orange foxglove for the front of the border.

Digitalis thapsi 'Spanish Peaks' is a reliably perennial selection noted for its lovely raspberry-rose flowers.

Dinteranthus vanzylii is related to Lithops. It is a lovely living stone in pastel shades of grey, lavender, and peach with subtlebrownish speckling.

Dinteranthus wilmotianus forms near spherical greyish white balls covered in subtle greyish spots and edged with yellow.

Fishbone or zig zag cactus (Disocactus anguliger, syn. Epiphyllum anguliger) is an epiphytic cactus from Mexico.