Sansevieria cylindrica
Encyclopedia
Sansevieria cylindrica, also known as the Cylindrical Snake Plant, African Spear or Spear Sansevieria, (Chinese: 石筆虎尾兰) is a succulent
Succulent plant
Succulent plants, also known as succulents or fat plants, are water-retaining plants adapted to arid climates or soil conditions. Succulent plants store water in their leaves, stems, and also in roots...

 plant
Plant
Plants are living organisms belonging to the kingdom Plantae. Precise definitions of the kingdom vary, but as the term is used here, plants include familiar organisms such as trees, flowers, herbs, bushes, grasses, vines, ferns, mosses, and green algae. The group is also called green plants or...

 native to Angola
Angola
Angola, officially the Republic of Angola , is a country in south-central Africa bordered by Namibia on the south, the Democratic Republic of the Congo on the north, and Zambia on the east; its west coast is on the Atlantic Ocean with Luanda as its capital city...

.

S. cylindrica has striped, round leaves that are smooth and a green-gray color. A single leaf is about 3 cm (1 in) thick and grows to a height between 1 m (3 ft) and 2 m (7 ft). The Spear Sansevieria grows fan-shaped, with its stiff leaves growing from a basal rosette
Rosette (botany)
In botany, a rosette is a circular arrangement of leaves, with all the leaves at a single height.Though rosettes usually sit near the soil, their structure is an example of a modified stem.-Function:...

. The species is interesting in having rounded instead of strap-shaped leaves caused by a failure to express genes
Gene expression
Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product. These products are often proteins, but in non-protein coding genes such as ribosomal RNA , transfer RNA or small nuclear RNA genes, the product is a functional RNA...

 which would cause the cylindrical bud to differentiate dorsoventrally or produce a distinctive and familiar top and bottom surface to the leaf blade. The plant blooms once a year in the spring or mid-summer, producing 3 cm (1 in) greenish-white tubular flowers tinged with pink. The species is drought-tolerant and in captivity needs water
Water
Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a...

 only about once every other week during the breeding season. The species was described by Wenceslas Bojer
Wenceslas Bojer
Wenceslas Bojer was a notable naturalist and botanist.He was born to Simon Bojer and Barbara Staub....

in 1837. Sansevieria cylindrica received its name from a competition in a Dutch national newspaper. It is popular as an ornamental plant as it is easy to culture and take care of in a home.

External links

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