10 most difficult flowers riddles

Lily of the valley increases the strength of heart contraction and is used in the initial stages of heart failure. It is also very toxic at overdose. Death poisoning in children after eating a few berries or drinking water from a vase in which a lily of the valley bouquet was made was described.

The saffron crocus is a triploid that is incapable of independent sexual reproduction — all propagation is via manual "divide-and-set" of a starter clone. It may have emerged via plant breeding in late Bronze-Age Crete.

In Brazil, the genus is referred to as Flor de Maio (May flower), reflecting the period in which they flower in the Southern hemisphere.

Tacca chantrieri, the black bat flower, is a species of flowering plant in the yam family Dioscoreaceae. Tacca chantrieri is an unusual plant in that it has black flowers. These flowers are somewhat bat-shaped, are up to 12 inches across, and have long 'whiskers' that can grow up to 28 inches. Tacca chantrierei is native to tropical regions of Southeast Asia.

Nasturtium comes from the nasturtium family. The others are asteraceae whose family has about 23.6 thousand species of plants.

Clarkia unguiculata is a species of wildflower known by the common name elegant clarkia or mountain garland. This plant is endemic to California, where it is found in many woodland habitats. The showy flowers have hairy. The paddle-like petals are a shade of pink to reddish to purple.

Neottia cordata, lesser twayblade or heartleaf twayblade is an orchid of upland bogs and mires that rarely exceeds 15 cm in height.The small flowers are purple-green in colour with a somewhat swollen calyx. It has a circumpolar distribution being found in Europe, Asia, Greenland and large parts of North America.

Sunflowers can be used to extract toxic ingredients from the soil, such as lead, arsenic and uranium. They are also used to neutralize radionuclides and other toxic ingredients and harmful bacteria from water. They were used to remove radioactive isotopes after the Chernobyl disaster and the Fukushima Daiichi nuclear disaster.

Echinopsis spachiana, commonly known as the golden torch, (white) torch cactus or golden column, is a species of cactus native to South America. Previously known as Trichocereus spachianus for many years, it is commonly cultivated as a pot or rockery plant worldwide.

The sword-billed hummingbird (Ensifera ensifera) is a neotropical species of hummingbird from the Andean regions of South America. It is the sole member of the genus Ensifera and is characterized by its unusually long bill; it is the only bird to have a beak longer than the rest of its body. This uncommon bird is also one of the largest hummingbird species.