''Ceropegia woodii'' is a

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

in the dogbane family

Apocynaceae Apocynaceae (from ''Apocynum'', Greek for "dog-away") is a family of flowering plants that includes trees, shrubs, herbs, stem succulents, and vines, commonly known as the dogbane family, because some taxa were used as dog poison Members of the ...

, native to

South Africa South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri ...

Eswatini Eswatini ( ; ss, eSwatini ), officially the Kingdom of Eswatini and formerly named Swaziland ( ; officially renamed in 2018), is a landlocked country in Southern Africa. It is bordered by Mozambique to its northeast and South Africa to its no ...

and

Zimbabwe Zimbabwe (), officially the Republic of Zimbabwe, is a landlocked country located in Southeast Africa, between the Zambezi and Limpopo Rivers, bordered by South Africa to the south, Botswana to the south-west, Zambia to the north, and Mozam ...

. It is sometimes treated as a

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

of the related ''

Ceropegia linearis ''Ceropegia linearis'' is a species of flowering plant in the family Apocynaceae, native to Southern Africa. The popular houseplant ''Ceropegia woodii'' is sometimes treated as a subspecies of ''C. linearis'', as ''C. linearis'' subsp. ''woodii ...

'', as ''C. linearis'' subsp. ''woodii''. Common names include chain of hearts, collar of hearts, string of hearts, rosary vine, hearts-on-a-string, and sweetheart vine.

History

In 1881, the

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

was discovered hanging from rocks on Groenberg Mountain in

Natal NATAL or Natal may refer to: Places * Natal, Rio Grande do Norte, a city in Brazil * Natal, South Africa (disambiguation), a region in South Africa ** Natalia Republic, a former country (1839–1843) ** Colony of Natal, a former British colony ( ...

, SA, at an altitude of 1800 feet, by

John Medley Wood John Medley Wood (1 December 1827 Mansfield, Nottinghamshire, England – 26 August 1915 Durban) was a South African botanist who contributed greatly to the knowledge of Natal ferns, is generally credited with the establishment of sugarcane mosa ...

, curator of the

Durban Botanic Gardens The Durban Botanic Gardens is situated in the city of Durban, KwaZulu-Natal, South Africa. It is Durban's oldest public institution and Africa's oldest surviving botanical gardens. The gardens cover an area of in a subtropical climate. Histo ...

. Thirteen years later, in 1894, he sent a living plant to the

Royal Botanic Gardens, Kew Royal Botanic Gardens, Kew is a non-departmental public body in the United Kingdom sponsored by the Department for Environment, Food and Rural Affairs. An internationally important botanical research and education institution, it employs 1,100 ...

, UK. The plant that had been sent to Kew subsequently flowered, providing the material for Plate 7704 of ''

Curtis's Botanical Magazine ''The Botanical Magazine; or Flower-Garden Displayed'', is an illustrated publication which began in 1787. The longest running botanical magazine, it is widely referred to by the subsequent name ''Curtis's Botanical Magazine''. Each of the issue ...

'' published in 1900. The prolific botanical artist

Matilda Smith Matilda Smith (1854–1926) was a botanical artist whose work appeared in ''Curtis's Botanical Magazine'' for over forty years. She became the first artist to depict New Zealand's flora in depth, the first official artist of the Royal Botanic ...

prepared the plate, while the Kew taxonomist,

N. E. Brown Nicholas Edward Brown (11 July 1849 in Redhill, Surrey – 25 November 1934 in Kew Gardens, London) was an English plant taxonomist and authority on succulents. He was also an authority on several families of plants, including Asclepiadacea ...

, produced a detailed description, naming the plant after its discoverer. Its trailing habit, neat appearance, and tolerance of neglect, made it an ideal plant for hanging baskets.

Description

It is an

evergreen In botany, an evergreen is a plant which has foliage that remains green and functional through more than one growing season. This also pertains to plants that retain their foliage only in warm climates, and contrasts with deciduous plants, which ...

succulent In botany, succulent plants, also known as succulents, are plants with parts that are thickened, fleshy, and engorged, usually to retain water in arid climates or soil conditions. The word ''succulent'' comes from the Latin word ''sucus'', meani ...

trailing

vine A vine (Latin ''vīnea'' "grapevine", "vineyard", from ''vīnum'' "wine") is any plant with a growth habit of trailing or scandent (that is, climbing) stems, lianas or runners. The word ''vine'' can also refer to such stems or runners themselv ...

that grows to in height and spreads to reach up to in length. Its leaves are shaped like hearts, about 1–2 cm wide and long. When exposed to sufficient light they have a deep green colour; under insufficient lighting the leaves are pale green. With age it develops a woody

caudex A caudex (plural: caudices) of a plant is a stem, but the term is also used to mean a rootstock and particularly a basal stem structure from which new growth arises.pages 456 and 695 In the strict sense of the term, meaning a stem, "caudex" is m ...

at its base. The roots, and occasionally the stems, will often develop tubers. On the stems these tubers form at nodes and are likely the reason for the common name of rosary vine. In general, the

flower A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechani ...

form is similar to those of other ''Ceropegia'' species. The corolla grows to 3 cm in length and is a mixed colouring of off-white and pale magenta. The five petals are a deeper purple.

Cultivation and uses

''Ceropegia woodii'' is tender and in

temperate In geography, the temperate climates of Earth occur in the middle latitudes (23.5° to 66.5° N/S of Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ranges throughout t ...

regions it is a very popular

houseplant A houseplant, sometimes known as a pot plant, potted plant, or an indoor plant, is an ornamental plant that is grown indoors. As such, they are found in places like residences and offices, mainly for decorative purposes. Common houseplants are us ...

, often grown in hanging baskets so the long trailing branches may hang down with their leaves spaced out like a row of large beads. Several

cultivar A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture, ...

s have been selected, some with

variegated Variegation is the appearance of differently coloured zones in the leaves and sometimes the stems and fruit of plants. Species with variegated individuals are sometimes found in the understory of tropical rainforests, and this habitat is the s ...

leaves. It requires excellent drainage, should be watered only when dry, and should never stand in water. Excess water should be removed from plant saucer after watering. It can be grown outdoors only in subtropical and tropical areas having a minimum temperature of 15°C (59°F). It typically requires shady conditions consisting of 3-4 hours of indirect sunlight. This plant has gained the

Royal Horticultural Society The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (Nort ...

Award of Garden Merit The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions. History The Award of Garden Merit ...

(confirmed 2017).

References

External links

Groenberg Mountain noted at Louis Fourie, owner of 'Slangrivier' wine farm in 1699 (under Paarl / Drakenstein / Franschoek / Wellington listings)
{{Taxonbar, from=Q148960 woodii Flora of Southern Africa House plants