Solanum mauritianum

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Solanum mauritianum
Solanum mauritianum (49090743062).jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Solanales
Family: Solanaceae
Genus: Solanum
Species:
S. mauritianum
Binomial name
Solanum mauritianum
Synonyms

See text

Solanum mauritianum is a small tree or shrub native to South America, including Northern Argentina, Southern Brazil, Paraguay and Uruguay. [1] Its common names include earleaf nightshade [2] (or "ear-leaved nightshade"), woolly nightshade, flannel weed, bugweed, tobacco weed, tobacco bush, wild tobacco and kerosene plant.

Contents

Description

Flowers Solanum mauritianum04.jpg
Flowers
Yellow fruits Solanum mauritianum07.jpg
Yellow fruits

The woolly nightshade is a multi-branched shrub or small tree between 2 and 4 meters high (but can grow up to 10 m (33 ft) tall in the right conditions). The plant has a strong odor and a life span of up to thirty years.

The simple, entire, ovate-elliptical large leaves are up to 40 centimeters long, 30 centimeters wide and are grey-green in color. The tip of the leaf is pointed, the base is wedge-shaped. They sit on 3 to 9 centimeters long petioles. They are dense, tomentose with hairy yellowish, long-stemmed, star-shaped trichomes.

Inflorescence

The slightly scented inflorescences are cymes of purple single flowers with a yellow center and sit on 15 centimeter long inflorescence axes. The sepals are fused into a 2 to 3 millimeter long calyx tube with 1 to 2 millimeter long lobes. The crown is star-shaped and measures between 1.5 and 2.5 centimeters. The five stamens sit on 1 millimeter long filaments. The anthers are egg-shaped and 2 to 3.5 millimeters long. The plant can flower year round but fruiting occurs in late spring to early summer.

After flowering, spherical yellow berries up to 2 cm in size with numerous, flattened seeds 1.5 to 2 millimeters long form. [3]

As invasive species

Naturalisation in Australia Solanum mauritianum 7th Brigade Park Chermside L1100315.jpg
Naturalisation in Australia

Woolly nightshade has become a widespread invasive weed in the Azores Islands, Cook Islands, Fiji, Hawai‘i, Java, New Caledonia, Norfolk Island, Madeira Island, Solomon Islands, Tonga, Réunion Island, Mauritius, Madagascar, Australia, New Zealand, India, Sri Lanka, [4] Nepal, Vietnam, Philippines, continental Portugal, the US states of California and Florida and several sub-Saharan African countries. [5] [6]

It arrived in New Zealand in 1880, and is now well established and naturalized from Taupō northward. Because of its ability to affect human health and because of its aggressive and fast growing character it is illegal in all areas of New Zealand to sell, propagate, or distribute any part of the plant, under the National Pest Plant Accord. It is poisonous and handling the plants can cause irritation and nausea. The dust-like fine hairs from the plant can cause irritation to the throat, nose, eyes and skin.

This plant has also become naturalized in Australia, particularly on the east coast and in desert ranges (South Australia). In Australia this plant is known colloquially as "tobacco bush weed", although Australia possesses many species of Nicotiana , which are more correctly known as wild tobaccos. [7] It is tolerant of many soil types and quickly becomes established around plantations, forest margins, scrub and open land.

In South Africa, biological control is being used in an attempt to manage Solanum mauritianum [1] – the flowerbud weevil Anthonomus santacruzi is being used as a control agent. S. mauritianum is a favoured food plant of the African olive pigeon (Columba arquatrix), [8] the Cape bulbul, the black-collared barbet, the red-eyed dove and red-whiskered bulbul. [9] In New Zealand biological control with woolly nightshade lace bug ( Gargaphia decoris ) has been attempted since 2010.

Toxicity

Large, mature tree Solanum mauritianum (49090544656).jpg
Large, mature tree

It is alleged that all parts of the Solanum mauritianum plant are poisonous to humans, especially the unripe berries, [6] and furthermore that human fatalities have resulted from the consumption of the berries, and cases of fatal poisoning in pigs and illness in cattle have been reported in Queensland. [10]

However, mountain possums appear to eat it without ill effect, and stripping of bark, leaves, and terminal shoots has destroyed pure stands of S.mauritianum. Watt & Brandwijk state that horses, domestic chickens and all birds eat the fruit with impunity, and further state that no records of poisoning in children exist, casting doubt on contrary published accounts. [11]

The main toxic compound is the alkaloid, solasodine, with the highest content in the unripe green berry (2–3.5% dry weight). [12] Solauricine, solauricidine, and solasodamine have also been found in Solanum mauritianum. [10]

Synonyms

Invading a riverside Solanum mauritianum plant NC1.jpg
Invading a riverside

The name Solanum mauritianum was applied by Blanco to S. erianthum and by Willdenow based on Roth to S. sisymbriifolium . [13]

In addition, wooly nightshade has a number of synonyms: [13]

S. auriculatum Mart. ex Dunal in DC. is S. granuloso-leprosum .
S. pulverulentum Nutt. ex Seem. is S. puberulum . Solanum pulverulentumPers. is S. cutervanum .
S. verbascifoliumL. is S. donianum ; S. verbascifoliumBanks ex Dunal in DC. is the same as the undeterminable S. stenorchis. Many other Solanum species ( S. conglobatum , S. erianthum , S. granuloso-leprosum, S. hazenii , S. riparium , and S. stipulaceum Roem. & Schult.) were once considered varieties of the ill-defined "S. verbascifolium" too.

Related Research Articles

<i>Solanum</i> Genus of flowering plants

Solanum is a large and diverse genus of flowering plants, which include three food crops of high economic importance: the potato, the tomato and the eggplant. It is the largest genus in the nightshade family Solanaceae, comprising around 1,500 species. It also contains the so-called horse nettles, as well as numerous plants cultivated for their ornamental flowers and fruit.

<span class="mw-page-title-main">Red-whiskered bulbul</span> Species of bird

The red-whiskered bulbul, or crested bulbul, is a passerine bird native to Asia. It is a member of the bulbul family. It is a resident frugivore found mainly in tropical Asia. It has been introduced in many tropical areas of the world where populations have established themselves. It has a loud three or four note call, feeds on fruits and small insects and perches conspicuously on trees. It is common in hill forests and urban gardens.

<i>Solanum carolinense</i> Species of plant

Solanum carolinense, the Carolina horsenettle, is not a true nettle, but a member of the Solanaceae, or nightshade family. It is a perennial herbaceous plant, native to the southeastern United States, though its range has expanded throughout much of temperate North America. The plant is an invasive in parts of Europe, Asia, Africa and Australia. The stem and undersides of larger leaf veins are covered with prickles.

<i>Solanum dulcamara</i> Species of plant

Solanum dulcamara is a species of vine in the genus Solanum of the family Solanaceae. Common names include bittersweet, bittersweet nightshade, bitter nightshade, blue bindweed, Amara Dulcis, climbing nightshade, felonwort, fellenwort, felonwood, poisonberry, poisonflower, scarlet berry, snakeberry, trailing bittersweet, trailing nightshade, violet bloom, and woody nightshade.

<i>Solanum pseudocapsicum</i> Species of plant

Solanum pseudocapsicum is a nightshade species with mildly poisonous fruit. It is commonly known as the Jerusalem cherry, Madeira winter cherry, or, ambiguously, "winter cherry". These perennials can be grown decoratively as house plants, but in some areas of South Africa, India, Australia and New Zealand it is regarded as a weed.

<i>Solanum americanum</i> Species of flowering plant in the nightshade family Solanaceae

Solanum americanum, commonly known as American black nightshade, small-flowered nightshade or glossy nightshade, is a herbaceous flowering plant of wide though uncertain native range. The certain native range encompasses the tropics and subtropics of the Americas, Melanesia, New Guinea, and Australia.

<i>Solanum nigrum</i> Species of flowering plant in the nightshade family Solanaceae

Solanum nigrum, the European black nightshade or simply black nightshade or blackberry nightshade, is a species of flowering plant in the family Solanaceae, native to Eurasia and introduced in the Americas, Australasia, and South Africa. Ripe berries and cooked leaves of edible strains are used as food in some locales, and plant parts are used as a traditional medicine. Some other species may also be referred to as "black nightshade".

<i>Solanum elaeagnifolium</i> Species of flowering plant

Solanum elaeagnifolium, the silverleaf nightshade or silver-leaved nightshade, is a species of plant in the nightshade family native to North and South America. It is common in parts of southwestern USA, and sometimes weed of western North America. Other common names include prairie berry, silverleaf nettle, white horsenettle or silver nightshade. In South Africa it is known as silver-leaf bitter-apple or satansbos. More ambiguous names include "bull-nettle", "horsenettle" and the Spanish "trompillo".

<i>Solanum sisymbriifolium</i> Species of flowering plant

Solanum sisymbriifolium is commonly known as vila-vila, sticky nightshade, red buffalo-bur, the fire-and-ice plant, litchi tomato, or Morelle de Balbis.

<i>Kalanchoe delagoensis</i> Species of succulent

Kalanchoe delagoensis, formerly known as Bryophyllum delagoense and commonly called mother of millions or chandelier plant, is a succulent plant native to Madagascar. Like other members of Bryophyllum, it is able to propagate vegetatively from plantlets that develop on its leaf margins.

<i>Solanum erianthum</i> Species of plant

Solanum erianthum is a species of nightshade that is native to southern North America and northern South America. It has been introduced to other parts of the world and has a nearly pantropical distribution. Common names include mullein nightshade, velvet nightshade, and salvadora. The potatoes are not the fruits of the trees, they are the leaves.

Solanum dimidiatum is a species of plant in the family Solanaceae known by the common names western horsenettle, Torrey's nightshade, and robust horsenettle. It is native to the central United States, where it grows in many types of habitat, including disturbed areas. In California it is known as an introduced species and a noxious weed. It is a rhizomatous perennial herb producing an erect stem up to 80 centimeters tall. It is covered in yellow prickles and branched hairs. The leaves may be up to 15 centimeters long, their edges wavy to lobed and sometimes toothed. The inflorescence is a branching array of several flowers. Each flower has a bell-shaped corolla measuring 3 to 5 centimeters wide. It is lavender to purple, or white. The five large, yellow anthers are about a centimeter long. The fruit is a spherical yellow berry up to 3 centimeters wide.

<i>Solanum douglasii</i> Species of flowering plant in the nightshade family Solanaceae

Solanum douglasii is a species of plant in the family Solanaceae known by the common name greenspot nightshade.

<i>Solanum marginatum</i> Species of flowering plant

Solanum marginatum is a species of plant in the family Solanaceae known by the common names purple African nightshade and white-margined nightshade. It is native to Ethiopia and Eritrea, and it is known on other continents as an introduced species and sometimes a weed. It is a hairy shrub growing up to two meters tall. The large, distinctive, gray-green leaves are wavy along the edges, woolly on the undersides, and measure up to 18 centimeters long. The veins are white and lined with large, widely spaced prickles. The inflorescence contains several white flowers, hanging or nodding bisexual flowers and erect staminate flowers with large yellow anthers. The fruit is a yellow berry up to 5 centimeters wide.

Solanum triflorum is a species of nightshade, in the family Solanaceae, also known as cutleaf nightshade and small nightshade. Like many nightshades, S. triflorum is native to South America, specifically to Argentina; it has made its way onto other continents, including Europe and Australia, as an introduced species, where it is deemed a weed, at times. It is also typically considered native to much of the Eastern and Western parts of the United states and parts of Canada, although there is some debate on the matter. It grows in many types of habitats, preferring tilled, disturbed terrain for germinating. It is an annual herb, producing sprawling, decumbent stems dotted with new growth. These decumbent, horizontal stems may quickly grow up to a meter in all directions. Solanum triflorum is covered in trichomes and hairs, which are sometimes mistaken for glands. The leaves are a few centimeters long, and deeply “cut” into slightly pointed, serrated lobes, garnering its common name, “cutleaf”. The inflorescence bears two or three flowers, each just under a centimeter wide when fully open. The flower is usually white, but may be greenish or purple-tinged. The fruit is a berry, similar to the nightshade family, roughly a centimeter wide.

<i>Solanum diphyllum</i> Species of flowering plant

Solanum diphyllum, commonly known as the twoleaf nightshade, is a species of nightshade native to the Americas. It is cultivated as an ornamental plant for its clusters of dark green round fruits that turn a bright yellow when ripe.

<i>Solanum villosum</i> Species of plant

Solanum villosum, the hairy nightshade, red nightshade or woolly nightshade, is a sprawling annual weed in Europe, western Asia, northern Africa and is also naturalized in Australia and North America.

<i>Solanum laxum</i> Species of flowering plant

Solanum laxum, commonly known as potato vine, potato climber or jasmine nightshade, is an evergreen vine in the family Solanaceae. It is native to South America and commonly grown as an ornamental garden plant.

<i>Solanum esuriale</i> Native Australian plant

Solanum esuriale is a species of perennial herbaceous plant native to Australia.

References

  1. 1 2 Olckersa, T.; Zimmermann, H.G. (October 1991). "Biological control of silverleaf nightshade, Solanum elaegnifolium, and bugweed, Solanum mauritianum, (Solanaceae) in South Africa". Agriculture, Ecosystems & Environment . 37 (1–3): 137–155. doi:10.1016/0167-8809(91)90143-L.
  2. USDA, NRCS (n.d.). "Solanum mauritianum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 17 November 2015.
  3. Hanno Schäfer: Flora of the Azores . Margraf Verlag, Weikersheim, ISBN 3-8236-1368-5 , p. 166 (English).
  4. Gunasekera, Lalith (October 2011). "Invaders In Knuckles Mountain Range". Sri Lanka Guardian.
  5. "Solanum mauritianum Scop.; Delic. Fl. Insubr. 3: 16 (1788)". worldplants.de. Retrieved 16 August 2022.
  6. 1 2 "Solanum Mauritianum Weed Profile". Global Invasive Species Database. Archived from the original on 2016-03-26. Retrieved 2009-08-30.
  7. "NSW WeedWise Resource". The NSW Government Department of Primary Industries database on invasive plants.
  8. Gibbs, David; Barnes, Eustace; Cox, John (2001). Pigeons and Doves. A&C Black. ISBN   1-873403-60-7.
  9. "Pycnonotus jocosus". Global Invasive Species Database. Archived from the original on 2013-12-30. Retrieved 2013-09-08. Pycnonotus jocosus (red-whiskered bulbul) is a bird native to Asia which has become invasive to several parts of the world. It has been found to damage crops, compete with native species and spread invasive plants.
  10. 1 2 Everist, S.L. (1981). Poisonous Plants of Australia. Angus & Robertson. ISBN   0-207-14228-9.
  11. Watt, J.M.; Brandwijk, M.G. (1962). Medicinal and Poisonous Plants of Southern and Eastern Africa (2nd ed.). Livingstone. ISBN   9780608142944.
  12. Vieira, R.F. (1989). Avaliação do teor de solasodina em frutos verdes de Solanum mauritianum Scop. sob dois solos no estado do Paraná, Brasil (MS thesis). Curitiba: Universidade Federal do Paraná.
  13. 1 2 "Solanum mauritianum". Solanaceae Source. August 2007.