10 most difficult plants 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.

Known for its latex, Gutta-Percha or Palaquium gutta is a tree found in Sumatra, Malaysia, Singapore, and Borneo.It grows up to 40 - 45 m in height. The bark is cracked and reddish brown. The leaves are thickly papery, oval, and have reddish-brown hairs underneath.

Some studies indicate that, on average, Cannabis sativa has higher levels of CBD compared to THC than C. indica. The effects of sativa are well known for its cerebral high, while indica is well known for its sedative effects which some prefer for night time use.[18] Both types are used as medical cannabis.

Rapeseed (Brassica napus) in the case of one particular group of cultivars, canola), is a bright-yellow flowering member of the family Brassicaceae (mustard or cabbage family), cultivated mainly for its oil-rich seed. It is the third-largest source of vegetable oil in the world.

The manchineel tree is native to tropical southern North America and northern South America. All parts of the tree contain strong toxins and even the merest contact with human skin causes a breakout of blisters, and blindness can occur if it touches a person's eyes. In some parts of its range, many trees carry a warning sign, while others are marked with a red "X" on the trunk to indicate danger.

The mulberry is a significant fiber crop in the history of paper. It was used for papermaking in China by around 100 AD. The paper recipe used by Cai Lun included plant bark fibres, rags and fishing nets. Early paper makers particularly valued Mulberry for producing high quality paper. Washi, a Japanese handcrafted paper, is made with the inner bark, which is pounded and mixed with water to produce a paste, which is dried into sheets.

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.

Primitivo, zinfandel, tribidrag, crljenak kaštelanski, kratošija - red grape variety, originating in Croatia

Ferula is a genus of about 170 species of flowering plants. Asafoetida, the dried latex from the rhizome of Ferula it is also known as food of the gods or devil's dung. The ferula also shows up in mythological contexts; Prometheus smuggled fire to humanity by hiding it in a ferula as well. In the Middle East, the common name "Lebanese Viagra" refers to the traditional use of the roots of this plant as an alleged aphrodisiac.

Welwitschia is endemic to the Namib desert. The age of individual plants is difficult to assess, but many plants may be over 1000 (or even 2000) years old. Because Welwitschia only produces a single pair of foliage leaves, the plant was thought by some to be neotenic, consisting essentially of a "giant seedling." However, research showed that its anatomy is not consistent with the giant seedling idea. Instead, the plant is more accurately thought of as achieving its unusual morphology as a result of having "lost its head" (apical meristem) at an early stage.