1. Toad Lily (Tricyrtis hirta)
Tricyrtis hirta or Toad Lily is native of Japan and belongs to the Liliaceae family. It is a perennial plant and grows in partial sun and shady locations and prefers rich soil. Toad Lily booms in late summer to mid autumn and bears unusual flowers of whitish petals that bear purple spots. These unusual flowers are usually 2.5 cm wide.
2. Fetid Adder’s Tongue (Scoliopus bigelovii)
Scoliopus bigelovii also known as Fetid Adder’s Tongue is another unusual flowering plant from the Liliaceae family. The name is derived from two Greek words skolios and pous meaning curved foot. These unusual flowers can be found in shaded forests of coastal areas of the western United States.
3. Sturt’s Desert Pea (Swainsona formosa)
Swainsona formosa or Sturt’s Desert Pea bears very unusual, blood-red flowers with distinctive bulbous black centre. It is native of arid regions of central and north-western Australia and belongs to the Fabaceae family. It flowers from spring to summer as short-lived annual but in favorable conditions it can bloom in the next season as well.
4. Flame Lily (Gloriosa superba)
This unusual flowering plant is native of tropical regions of Asia and Africa and belongs to Colchicaceae family. Flame Lily usually grows as tuberous climbing plant and produces unusual red or yellow flowers with wavy edges. It can be grown easily from seeds though germination takes a little long time. It is also the national flower of Zimbabwe.
5. Passion Flower (Passiflora alata)
Passion flower belongs to the Passifloraceae family and has more than 500 species. Passiflora Alata produces unusual flowers of scarlet color. These flowers are fragrant and usually 7 – 10 cm wide. This unusual flowering plant comes from the Amazon region of Brazil.
6. Teasel Banksia (Banksia puclhella)
Teasel Banksia belongs to the family of Banksia which is native of Australia. These unusual flowers are red and yellow in color. The plant grows under ample sunlight and prefers low moisture. Suitable for suitable for xeriscaping, this unusual flowering plant can tolerate spells of droughts.
7. Fuchsia ‘Blue Eyes’
Fuchsia ‘Blue Eyes’ is a small deciduous trailing shrub that produces unusual pink and lavender flowers. The plant blooms in early summer to late summer.
8. Bat Flower (Tacca chantrieri)
Bat Flower is another unusual flower from tropical forests of China. It belongs to the family of Dioscoreaceae.
9. Bee Orchid (Ophrys apifera)
Bee Orchid comes from the Mediterranean regions and belongs to the orchid family. This perennial plant produces one to ten flowers on each spike every summer. It prefers well-drained soil and partial sunlight.
10. Titan Arum (Amorphophallus titanum)
Titan Arum is one of the most unusual flowers of the world. The inflorescence of Titan Arum can reach up to 3 meters and emits bad odor, which is why, it is also called carrion flower or corpse flower. The plant can be found in certain regions of Sumatra and Indonesia. The largest known plant of Titan Arum weighed 91 Kilograms.
11. Bleeding Heart (Dicentra)
Dicentra is a perennial herbaceous plant from eastern Asia and North America. The plant produces heart-shaped poisonous flowers.
12. Rafflesia arnoldii (Corpse Lily)
Another remarkably different and unusual flower, Rafflesia arnoldii is also the largest flower of the world. This unusual flowering plant is rare and hard to find in its habitat (rainforests of Bengkulu, Sumatra Island and Indonesia). Flowers emit bad smell and can be as wide as 1 meter wide and weigh up to 11 kilogram.
13. Carrion Flower (Stapelia gigantea)
Carrion Flower or Stapelia gigantea belongs to the family of Stapeliads from South Africa. There are more than 70 species of Stapelia each having different coloration and flowers. Stapelia are good container plants and can grow well under full sun and light to moderate watering. Plant them in well-drained compost as the stems are prone to rotting if kept moist for long. Flowers of Stapelia Gigantea can grow as big as 41 cm when in full bloom. These hairy and foul-smelling flowers attract insects especially flies that act as pollinators.
The genus of Stapelia offers many more species and varieties that are easy to grow and produce unique and very unusual flowers. Most of these varieties are easily available at local nurseries and online sellers.
14. Bird of Paradise (Strelitzia)
Bird of Paradise also known as Crane Flower is another unusual flower from South Africa. The plant belongs to the Strelitziaceae family and produced unusually colorful and beautiful flowers that resemble a bird.
15. Huernia oculata
This unusual flowering plant belongs to the family of Apocynaceae. The plant produces small succulent stems. The stems can be used to propagate the plant. The plant is fairly easy to grow in well drained soil and dry climate.