Solanum carolinense

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Carolina horsenettle
Solanum carolinense in flower.jpg
Young plant showing leaves and flowers. Notice the prickles on the stem.
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. carolinense
Binomial name
Solanum carolinense
L.
Synonyms [1]
Synonymy
  • Solanum carolinense f. albiflorum(Kuntze) Benke
  • Solanum carolinense var. albiflorumKuntze
  • Solanum carolinense var. floridanum(Dunal) Chapm.
  • Solanum carolinense var. pohlianumDunal
  • Solanum floridanumRaf. 1840
  • Solanum floridanumShuttlew. ex Dunal 1852
  • Solanum godfreyiShinners
  • Solanum pleeiDunal

Solanum carolinense, the Carolina horsenettle, [2] 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. [3] The plant is an invasive in parts of Europe, Asia, Africa and Australia. [4] [5] The stem and undersides of larger leaf veins are covered with prickles.

Contents

"Horsenettle" is also written "horse nettle" or "horse-nettle", though USDA publications usually use the one-word form. Though there are other horsenettle nightshades, S. carolinense is the species most commonly called "the horsenettle". Other common names include radical weed, sand brier or briar, bull nettle, tread-softly, Solanum mammosum ("apple of Sodom"), devil's tomato and wild tomato.

Flowers Horsenettle1846.JPG
Flowers
Ripe Fruit Horse nettle berries.jpg
Ripe Fruit

Description

Leaves are alternate, elliptic-oblong to oval, 6 to 11 centimetres (2+12 to 4+12 inches) long, and each is irregularly lobed or coarsely toothed. Both surfaces are covered with fine hairs. Leaves smell like potatoes when crushed. The flowers have five petals and are usually white or purple with yellow centers, though there is a blue variant that resembles the tomato flower. The fruits are berries that resemble tomatoes. The immature fruit is dark green with light green stripes, turning yellow and wrinkled as it matures. Each fruit contains around 60 seeds. It flowers throughout the summer, from April to October (on the northern hemisphere). The plant grows to 90 cm (3 ft) tall, is perennial, and spreads by both seeds and underground rhizome. Stems of older plants are woody. [6]

Toxicity

Many parts of the plant have historically been used to create medicines to treat various conditions. It was listed in the United States National Formulary from 1916 to 1936 for use by pharmacists. [7] [8] [9] However all parts of the plant, including its tomato-like fruit, contain toxins in varying degrees due to the presence of solanine glycoalkaloids which is a toxic alkaloid and one of the plant's natural defenses. While ingesting any part of the plant can cause fever, headache, scratchy throat, nausea, vomiting, and diarrhea, ingesting the fruit can cause abdominal pain, circulatory and respiratory depression, or even death. [8]

Ecology

Habitat

These plants can be found growing in pastures, roadsides, railroad margins, and in disturbed areas and waste ground. They grow to about 1 m (40 in) tall, but are typically shorter, existing as subshrubs. [6] They prefer full sun, but can tolerate both wet or dry conditions. They grow readily in sandy or loamy soils, and may also tolerate a wide range of soil types. They are most vigorous and most likely to become weedy or dominate on disturbed sites, but can also be found in less disturbed habitats. [10]

Faunal associations and diseases

Bumble bees pollinate the flowers of this species.

At least thirty-two insects, as well as the meadow vole Microtus pennsylvanicus , have been recorded feeding on this species in Virginia alone. [11] The caterpillars of the Synanthedon rileyana moth [10] and the Manduca sexta (tobacco hornworm) moth feed on the plant. Manduca sexta moths prefer inbred plants to outbred plants. The beetle Leptinotarsa juncta specializes on this plant, and the beetle Epitrix fuscula (eggplant flea beetle) eats it as well. [12] These two beetles are its two primary herbivores, and can reduce fruit production by as much as 75% relative to plants protected from all insects. [12] Anthonomus nigrinus feeds on the flowers, and Trichobaris trinotata bores into the stems. [11] This plant is also eaten by Leptinotarsa decemlineata (the Colorado potato beetle) and has been recorded as being eaten at very low rates by pupae of an unidentified species of the family Gelechiidae. [13]

Milkweed leaf beetle larvae consuming horsenettle. The leaves contain embedded leaf prickles that extend through the leaf protecting it from many herbivores.

Parasitic nematodes of the genus Pratylenchus have been found on lesions on its roots, however causing little damage. The fungus Rhizoctonia solani was found causing root rot, particularly under wet conditions in plants damaged by trampling. The plant is also affected by Erysiphe cichoracearum , causing powdery mildew. [13]

Fruits are eaten by a variety of native animals, including ring-necked pheasant, bobwhite, wild turkey, and striped skunk. Most mammals avoid eating the stems and leaves due to both the spines and toxicity of the plant. [10]

Weed

Carolina horsenettle is considered a noxious weed in one US state (Alaska). [14] It can spread vegetatively by underground rhizomes as well as by seed. It is resistant to many postemergent herbicides and somewhat resistant to broad-spectrum herbicides such as glyphosate and 2,4-D. In fact, herbicide use often selects for horsenettle by removing competing weeds. It is an especially despised weed by gardeners who hand-weed, as the prickles tend to penetrate the skin and then break off when the plant is grasped. The deep root also makes it difficult to remove.

Flower Solanum carolinense flower.jpg
Flower
Stem Solanum carolinense stem.jpg
Stem

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.

<i>Nicotiana</i> Genus of flowering plants in the nightshade family Solanaceae

Nicotiana is a genus of herbaceous plants and shrubs in the family Solanaceae, that is indigenous to the Americas, Australia, Southwestern Africa and the South Pacific. Various Nicotiana species, commonly referred to as tobacco plants, are cultivated as ornamental garden plants. N. tabacum is grown worldwide for the cultivation of tobacco leaves used for manufacturing and producing tobacco products, including cigars, cigarillos, cigarettes, chewing tobacco, dipping tobacco, snuff, and snus.

<i>Solanum viarum</i> Species of shrub

Solanum viarum, the tropical soda apple, is a perennial shrub native to Brazil and Argentina with a prickly stem and prickly leaves. The fruit is golf-ball-sized with the coloration of a watermelon. It is considered an invasive species in the lower eastern coastal states of the United States and recently on the Mid North Coast of Australia.

<i>Rumex obtusifolius</i> Species of flowering plant in the family Polygonaceae

Rumex obtusifolius, commonly known as bitter dock, broad-leaved dock, bluntleaf dock, dock leaf, dockens or butter dock, is a perennial plant in the family Polygonaceae. It is native to Europe, but is found on all temperate continents. It is a highly invasive species in some zones, resulting from its abundant seed dispersal, adaptability to reproduce, aggressive roots, ability to tolerate extreme climates, and hardiness.

<span class="mw-page-title-main">False potato beetle</span> Species of beetle

The false potato beetle is a beetle found primarily in the Mid-Atlantic and Southeastern United States. Its distribution extends to Maine.

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

Solanum mammosum, commonly known as nipplefruit, fox head, cow's udder, or apple of Sodom, is an inedible Pan-American tropical fruit. The plant is grown for ornamental purposes, in part because of the distal end of the fruit's resemblance to a human breast, while the proximal end looks like a cow's udder. It is an annual in the family Solanaceae, and part of the genus Solanum, making the plant a relative of the eggplant, tomato, and potato. This poisonous fruit is native to South America, but has been naturalized in Southern Mexico, Greater Antilles, Central America, and the Caribbean. The plant adapts well to most soils, but thrives in moist, loamy soil.

<i>Lycopersicon</i> Obsolete genus of flowering plants

Lycopersicon was a genus in the flowering plant family Solanaceae. It contained about 13 species in the tomato group of nightshades. First removed from the genus Solanum by Philip Miller in 1754, its removal leaves the latter genus paraphyletic, so modern botanists generally accept the names in Solanum. The name Lycopersicon is still used by gardeners, farmers, and seed companies. Collectively, the species in this group apart from the common cultivated plant are called wild tomatoes.

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

Solanum rostratum is a species of nightshade that is native to the United States and northern and central Mexico. Common names include buffalobur nightshade, buffalo-bur, spiny nightshade, Colorado bur, Kansas thistle, bad woman, Mexican thistle, and Texas thistle.

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.

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>Lebia grandis</i> Species of beetle

Lebia grandis is a ground beetle in the family Carabidae found in North America. It is a specialist predator on the eggs and larvae of Colorado potato beetles, and its larvae are obligate parasitoids of Colorado potato beetle pupae.

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

Solanum tampicense, also known as wetland nightshade, aquatic soda apple, and scrambling nightshade, is a perennial in the Solanaceae or Nightshade Family. It can exist as a vine, tree, or shrub and is native to the West Indies and Central America. It is classified as a noxious weed by the United States Department of Agriculture and by several states and is known as an invasive species in the state of Florida.

<i>Smilax bona-nox</i> Species of flowering plant

Smilax bona-nox, the saw greenbrier, is a species of plant in the family Smilacaceae. It is native to the Southern United States, and eastern Mexico.

<i>Solanum macrocarpon</i> Species of fruit and plant

Solanum macrocarpon otherwise known as the African eggplant : añara), Surinamese eggplant or Vietnamese eggplant is a plant of the family Solanaceae. S. macrocarpon is a tropical perennial plant that is closely related to the eggplant. S. macrocarpon originated from West Africa, but is now widely distributed in Central and East Africa. The plant also grows in the Caribbean, South America, and some parts of Southeast Asia. S. macrocarpon is widely cultivated for its use as a food, its medicinal purposes, and as an ornamental plant.

<span class="mw-page-title-main">Stinging plant</span> Plant with hairs (trichomes) on its leaves or stems

A stinging plant or a plant with stinging hairs is a plant with hairs (trichomes) on its leaves or stems that are capable of injecting substances that cause pain or irritation.

<span class="mw-page-title-main">Milkweed leaf beetle</span> Species of beetle

The milkweed leaf beetle is a species of leaf beetle from the family Chrysomelidae. It is round bodied, 8–11 mm in length with a black head and pronotum and bright orange to yellow elytra with variable mottled black patches. Its colored and shaped like a super-sized ladybird beetle even though the ladybird is in a different family, Coccinellidae. The larva is shaped much like the adult except with a small tail extension. Its color varies from bright orange to white with a gray to black pronotum and prominent black spots around its spiracles.

Trichobaris trinotata, commonly known as the "Potato stalk borer", is a species of weevil in the family Curculionidae. It is found in North America where it is a pest of potato plants, the larvae tunnelling inside their stems.

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

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

References

  1. Solanaceae Source [2008]: Solanum carolinense. Retrieved 2008-SEP-26.
  2. USDA, NRCS (n.d.). "Solanum carolinense". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 17 November 2015.
  3. "USDA Plants Database".
  4. EUROPEAN AND MEDITERRANEAN PLANT PROTECTION ORGANIZATION, ЕВРОПЕЙСКАЯ И СРЕДИЗЕМНОМОРСКАЯ ОРГАНИЗАЦИЯ ПО КАРАНТИНУ И ЗАЩИТЕ РАСТЕНИЙ, ORGANISATION EUROPEENNE ET MEDITERRANEENNE POUR LA PROTECTION DES PLANTES, Solanum carolinense
  5. Flora Italiana, Morella della Carolina, Solanum carolinense L.
  6. 1 2 Bradley, Kevin W.; Hagood, Edward S. "Identification and Control of Horsenettle (Solanum carolinense) in Virginia" (PDF). Archived from the original (PDF) on 2010-06-12. Retrieved 6 October 2013.
  7. "Solanum carolinense (Apple of Sodom, Bull Nettle, Carolina Horse-Nettle, Devil's Potato, Devil's Tomato, Horsenettle, Horse Nettle, Poisonous Potato, Thorn Apple, Wild Tomato) | North Carolina Extension Gardener Plant Toolbox". plants.ces.ncsu.edu. Retrieved 2023-09-20.
  8. 1 2 Georgetown University Medical Center : Horse Nettle Archived 2013-03-29 at the Wayback Machine . Retrieved 2013-JUN-25.
  9. "Solanum carolinense - Useful Temperate Plants". temperate.theferns.info. Retrieved 2023-09-20.
  10. 1 2 3 Horse Nettle (Solanum carolinense), Illinois Wildflowers
  11. 1 2 Michael J. Wise, "The Herbivores of Solanum carolinense (Horsenettle) in Northern Virginia: Natural History and Damage Assessment", Southeastern Naturalist 6(3):505-522. 2007.
  12. 1 2 Michael J. Wise, Christopher F. Sacchi, "Impact of two specialist insect herbivores on reproduction of horse nettle, Solanum carolinense", Oecologia (1996), 108: pp. 328-337.
  13. 1 2 "Insects, Nematodes, and Pathogens Associated with Horsenettle (Solanum carolinense) in Bermudagrass (Cynodon dactylon) Pastures", Weed Science Vol. 40, No. 2 (Apr - Jun., 1992), pp. 320-325
  14. "Plants Profile for Solanum carolinense (Carolina horsenettle)".