Zamioculcas | |
---|---|
A cultivated specimen | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Order: | Alismatales |
Family: | Araceae |
Subfamily: | Zamioculcadoideae |
Genus: | Zamioculcas Schott |
Species: | Z. zamiifolia |
Binomial name | |
Zamioculcas zamiifolia | |
Zamioculcas is a genus of flowering plants in the family Araceae, containing the single species Zamioculcas zamiifolia. [2] It is a tropical herbaceous perennial plant, and is native to eastern Africa, including Kenya, KwaZulu-Natal, Malawi, Mozambique, Tanzania, and Zimbabwe. [2] Its common names include Zanzibar gem, ZZ plant, Zuzu plant, aroid palm, eternity plant and emerald palm. [3] It is grown as a houseplant, mainly because it has attractive glossy foliage and is easy to care for. Zamioculcas zamiifolia is winter-hardy in USDA Zones 9 and 10. [4]
Dutch nurseries began wide-scale commercial propagation of the plant around 1996. [5] It was first described in 1829 by Loddiges, who named it Caladium zamiifolium; Heinrich Wilhelm Schott later reassigned it to the genus Zamioculcas, and Adolf Engler renamed it Zamioculcas zamiifolia.
The genus Zamioculcas derives its name from the similarity of its foliage to that of the cycad genus Zamia and its kinship to the Araceae genus Colocasia , whose name comes from the word “culcas” or “colcas” (from an ancient Middle Eastern name), [6] qolqas in Arabic (Egyptian Arabic : قلقاس, IPA: [ʔolˈʔæːs] ). [7] Botanical synonyms include Caladium zamiaefolium, Zamioculcas loddigesii and Z. lanceolata.
The species name Zamiifolia means "leaves like Zamia" and is formed from the botanical name Zamia and the Latin word folium, "leaf." [8]
It is an herbaceous perennial growing to 45–60 centimetres (18–24 in) tall, from a stout, underground, succulent rhizome. It is normally evergreen but becomes deciduous during drought, surviving drought due to the large potato-like rhizome that stores water until rainfall resumes.
The most visible "branches" are actually smooth, shiny, dark green, pinnately compound leaves. These are 40–60 cm (16–24 in) long, with swollen, succulent petioles and 6–8 pairs of leaflets, each 7–15 cm (3–6 in) long. Zamioculcas zamiifolia grows slowly, reaching heights and widths ranging from 2 to 4 feet (0.61 to 1.22 m). [8]
The flowers are produced in a small, bright yellow to brown or bronze spadix 5–7 cm (2–3 in) long and wrapped in a yellow-green spathe; the whole inflorescence is partly hidden among the branch bases. Flowering is from midsummer to early autumn.
Zamioculcas zamiifolia contains 91% water in the leaves, and 95% water in the petioles. [15] It has an individual leaf longevity of at least six months, which may be the reason it can survive extremely well under interior low light levels for four months without water. [16]
It may survive outdoors as long as the temperature does not fall below around 15 °C (60 °F); though best growth is between 18 and 26 °C (64 and 79 °F), while high temperatures give an increase in leaf production. In temperate regions, it is grown as a houseplant. Overwatering may destroy this plant through tuber rot. Bright, indirect light is best; some sun will be tolerated. [16]
Zamioculcas zamiifolia may be propagated by leaf cuttings: typically, the lower ends of detached leaves are inserted into a moist, gritty growing medium, and the pot is enclosed in a polythene bag. Though the leaves may well decay, succulent bulb-like structures should form in the bag, and these may be potted up to produce new plants. The process may take upwards of one year. The plant can also be propagated by division.
Due to its strong green leaves, it is especially suitable for open, bright rooms. [17] When grown indoors, the plant prefers bright indirect light but will tolerate low light conditions. However, lower light is not optimal for an extended period of time. Insufficient amounts of sunlight can result in leaves lengthening and/or falling off, yellowing (chlorosis), and generally uneven or disproportionate growth as the plant stretches towards a light source. When grown outdoors, Zamioculcas zamiifolia prefers part shade to full shade. [4]
The substrate used must be well-drained and contain nutrients. It can be composed of a mixture of tanned ox manure, washed river sand and red earth (1:1:1). [18] For indoor plants, use a well-drained potting soil mix. [8]
Zamioculcas zamiifolia roots are rhizomatous and have the ability to store moisture, thus aiding the plants in their drought resistance. The plants like regular waterings, but the soil should be allowed to dry out between waterings. [4]
Though little information is available, Z. zamiifolia is apparently used medicinally in the Mulanje District of Malawi and in the East Usambara mountains of Tanzania where juice from the leaves is used to treat earache. [19]
In Tanzania, a poultice of bruised plant material from Z. zamiifolia is used as a treatment for the inflammatory condition known as "mshipa". [20]
Roots from Z. zamiifolia are used as a local application to treat ulceration by the Sukuma people in north-western Tanzania. [21]
Zamioculcas zamiifolia contains acylated C-glycosylflavone apigenin 6-C-(6″-O-(3-hydroxy-3-methylglutaroyl)- β-glucopyranoside). [15]
A 2014 study from the Department of Plant and Environmental Science at the University of Copenhagen shows that, in a laboratory setting, the plant is able to remove volatile organic compounds in this order of effectiveness: benzene, toluene, ethylbenzene and xylene at a molar flux of around 0.01 mol/(m2 day). The same study stated that any effectiveness on indoor environments is inconclusive. [22]
Zamioculcas zamiifolia is part of the family Araceae , which includes many poisonous genera, such as Philodendron , Monstera , Anthurium , Dieffenbachia , Aglaonema and Spathiphyllum , all of which contain insoluble calcium oxalate.
An initial toxicological experiment, conducted by the University of Bergen in 2015, on extracts from Z. zamiifolia (using brine shrimp as a lethality assay), did not indicate lethality to the shrimp, even at concentrations of extracts up to 1 mg/mL. The scientists conducting the experiment observed that, "…On the contrary, it could appear as though the extract contributed to improvements in the vitality of the larvae". [15]
The Araceae are a family of monocotyledonous flowering plants in which flowers are borne on a type of inflorescence called a spadix. The spadix is usually accompanied by, and sometimes partially enclosed in, a spathe. Also known as the arum family, members are often colloquially known as aroids. This family of 114 genera and about 3,750 known species is most diverse in the New World tropics, although also distributed in the Old World tropics and northern temperate regions.
Colocasia is a genus of flowering plants in the family Araceae, native to southeastern Asia and the Indian subcontinent. Some species are widely cultivated and naturalized in other tropical and subtropical regions.
Dieffenbachia, commonly known as dumb caneorleopard lily, is a genus of tropical flowering plants in the family Araceae. It is native to the New World Tropics from Mexico and the West Indies south to Argentina. Some species are widely cultivated as ornamental plants, especially as houseplants, and have become naturalized on a few tropical islands.
In botany, a spadix is a type of inflorescence having small flowers borne on a fleshy stem. Spadices are typical of the family Araceae, the arums or aroids. The spadix is typically surrounded by a leaf-like curved bract known as a spathe. For example, the "flower" of the well known Anthurium spp. is a typical spadix with a large colorful spathe.
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 usually tropical or semi-tropical, and are often epiphytes, succulents or cacti.
Alocasia is a genus of rhizomatous or tuberous, broad-leaved, perennial, flowering plants from the family Araceae. There are about 90 accepted species native to tropical and subtropical Asia and eastern Australia. Around the world, many growers widely cultivate a range of hybrids and cultivars as ornamentals.
Zamia furfuracea is a species of cycad endemic to southeastern Veracruz state in eastern Mexico.
Spathiphyllum is a genus of about 60 species of monocotyledonous flowering plants in the family Araceae, native to tropical regions of the Americas and southeastern Asia. Certain species of Spathiphyllum are commonly known as spath or peace lilies.
Dracaena trifasciata is a species of flowering plant in the family Asparagaceae, native to tropical West Africa from Nigeria east to the Congo. It is most commonly known as the snake plant, Saint George's sword, mother-in-law's tongue, and viper's bowstring hemp, among other names. Until 2017, it was known under the synonym Sansevieria trifasciata. This plant is often kept as a houseplant due to its non-demanding maintenance; they can survive with very little water and sun.
Zantedeschia is a genus of eight species of herbaceous, perennial, flowering plants in the aroid family, Araceae, native to southern Africa(from South Africa northeast to Malawi). The genus has been introduced, in some form, on every continent.
Caladium is a genus of flowering plants in the family Araceae. They are often known by the common name elephant ear, heart of Jesus, and angel wings. There are over 1000 named cultivars of Caladium bicolor from the original South American plant.
Aglaonema is a genus of flowering plants in the arum family, Araceae. They are native to tropical and subtropical regions of Asia and New Guinea. They are known commonly as Chinese evergreens.
Raphides are needle-shaped crystals of calcium oxalate monohydrate or calcium carbonate as aragonite, found in more than 200 families of plants. Both ends are needle-like, but raphides tend to be blunt at one end and sharp at the other.
Beaucarnea recurvata, the elephant's foot or ponytail palm, is a species of flowering plant in the family Asparagaceae. The species was native to numerous states of eastern Mexico but is now confined to the state of Veracruz. Despite its common name, it is not closely related to the true palms (Arecaceae). It has become popular in Europe and worldwide as an ornamental plant. There are 350-year-old Beaucarneas registered in Mexico.
Sansevieria is a historically recognized genus of flowering plants, native to Africa, notably Madagascar, and southern Asia, now included in the genus Dracaena on the basis of molecular phylogenetic studies. Common names for the 70 or so species formerly placed in the genus include mother-in-law's tongue, devil's tongue, jinn's tongue, bow string hemp, snake plant and snake tongue. In the APG III classification system, Dracaena is placed in the family Asparagaceae, subfamily Nolinoideae. It has also been placed in the former family Dracaenaceae.
Coleus scutellarioides, commonly known as coleus, is a species of flowering plant in the family Lamiaceae, native to southeast Asia through to Australia. Typically growing to 60–75 cm (24–30 in) tall and wide, it is a bushy, woody-based evergreen perennial, widely grown for the highly decorative variegated leaves found in cultivated varieties. Another common name is painted nettle, reflecting its relationship to deadnettles, which are in the same family. The synonyms Coleus blumei, Plectranthus scutellarioides and Solenostemon scutellarioides are also widely used for this species.
Chamaedorea elegans, the neanthe bella palm or parlour palm, is a species of small palm tree native to the rainforests in Southern Mexico and Guatemala. The parlor palm is one of the most extensively sold houseplant palms in the world. It is one of several species with leaves that are harvested as xate.
Crassula ovata, commonly known as jade plant, lucky plant, money plant or money tree, is a succulent plant with small pink or white flowers that is native to the KwaZulu-Natal and Eastern Cape provinces of South Africa, and Mozambique; it is common as a houseplant worldwide. Much of its popularity stems from the low levels of care needed; the jade plant requires little water and can survive in most indoor conditions. It is sometimes referred to as the money tree; however, Pachira aquatica also has this nickname.
Thaumatophyllum xanadu is a perennial plant belonging to the arum family Araceae and the genus Thaumatophyllum, formerly classified under the Meconostigma subgenus of Philodendron. This plant is native to Brazil, but is widely cultivated as a landscape plant in tropical, subtropical and warm temperate climates.
Anthurium clarinervium is a species of flowering plant in the family Araceae native to Chiapas, Mexico. The Anthurium genus is known to contain approximately 1,000 species, resulting in one of the most diverse Central American tropical plant genera.