Solanum

''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 (aubergine, brinjal). It is the largest genus in the nightshade family Solanaceae, comprising around 1,500 species. It also contains the so-called horse nettles (unrelated to the genus of true nettles, ''Urtica''), as well as numerous plants cultivated for their ornamental flowers and fruit.

''Solanum'' species show a wide range of growth habits, such as annuals and perennials, vines, subshrubs, shrubs, and small trees. Many formerly independent genera like '' Lycopersicon'' (the tomatoes) and ''Cyphomandra'' are now included in ''Solanum'' as subgenera or sections. Thus, the genus today contains roughly 1,500–2,000 species.

Name

The generic name was first used by Pliny the Elder (AD 23–79) for a plant also known as , most likely ''S. nigrum''. Its derivation is uncertain, possibly stemming from the Latin word , meaning "sun", referring to its status as a plant of the sun.

Species having the common name "nightshade"

The species most commonly called nightshade in North America and Britain is ''Solanum dulcamara'', also called bittersweet or woody nightshade (so-called because it is a ( scandent) shrub). Its foliage and egg-shaped red berries are poisonous, the active principle being solanine, which can cause convulsions and death if taken in large doses. Black nightshade (''Solanum nigrum'') is also generally considered poisonous, but its fully-ripened fruit and foliage are cooked and eaten in some areas. Deadly nightshade (''Atropa belladonna'') belongs, like ''Solanum'', to subfamily Solanoideae of the nightshade family, but, unlike that genus, is a member of tribe Hyoscyameae (''Solanum'' belongs to tribe Solaneae). The chemistry of '' Atropa'' species is very different from that of Solanum species and features the very toxic tropane alkaloids, the best-known of which is atropine.

Food crops

Most parts of the plants, especially the green parts and unripe fruit, are poisonous to humans (although not necessarily to other animals), but many species in the genus bear some edible parts, such as fruits, leaves, or tubers. Three crops in particular have been bred and harvested for consumption by humans for centuries, and are now cultivated on a global scale:
* Tomato, ''S. lycopersicum''
** Tomato varieties are sometimes bred from both ''S. lycopersicum'' and wild tomato species such as ''S. pimpinellifolium'', ''S. peruvianum'', ''S. cheesmanii'', ''S. galapagense'', ''S. chilense'', etc. (such varieties include—among others—Bicentennial, Dwarf Italian, Epoch, Golden Sphere, Hawaii, Ida Red, Indigo Rose, Kauai, Lanai, Marion, Maui, Molokai, Niihau, Oahu, Owyhee, Parma, Payette, Red Lode, Super Star, Surecrop, Tuckers Forcing, V 121, Vantage, Vetomold, and Waltham.)
* Potato, ''S. tuberosum'', fourth largest food crop.
** Less important but cultured relatives used in small amounts include ''S. stenotomum, S. phureja, S. goniocalyx, S. ajanhuiri, S. chaucha, S. juzepczukii, S. curtilobum''.
* Eggplant (also known as brinjal or aubergine), ''S. melongena''

Other species are significant food crops regionally, such as Ethiopian eggplant or gilo ('' S. aethiopicum''), naranjilla or lulo (''S. quitoense''), Turkey berry ('' S. torvum''), pepino or pepino melon ('' S. muricatum''), Tamarillo ('' S. betaceum''), wolf apple ('' S. lycocarpum''), garden huckleberry ('' S. scabrum'') and " bush tomatoes" (several Australian species).

Ornamentals

The species most widely seen in cultivation as ornamental plants are:
*'' S. aviculare'' (kangaroo apple)
*'' S. capsicastrum'' (false Jerusalem cherry, winter cherry)
*'' S. crispum'' (Chilean potato tree)
*'' S. laciniatum'' (kangaroo apple)
*'' S. laxum'' (potato vine)
*'' S. pseudocapsicum'' (Christmas cherry, winter cherry)
*'' S. rantonnetii'' (blue potato bush)
*'' S. seaforthianum'' (Italian jasmine, St. Vincent lilac)
*'' S. mauritianum'' (woolly nightshade, earleaf nightshade)
*'' S. wendlandii'' (paradise flower, potato vine)

Medicine

Poisonings associated with certain species of ''Solanum'' are not uncommon and may be fatal. However, several species are locally used in folk medicine, particularly by native people who have long employed them.

Ecology

''Solanum'' species are used as food plants by the larvae of some Lepidoptera species (butterflies and moths) – see list of Lepidoptera that feed on ''Solanum''.

Systematics

The genus was established by Carl Linnaeus in 1753. Its subdivision has always been problematic, but slowly some sort of consensus is being achieved.

The following list is a provisional lineup of the genus' traditional subdivisions, together with some notable species. Many of the subgenera and sections might not be valid; they are used here provisionally as the phylogeny of this genus is not fully resolved yet and many species have not been reevaluated.

Cladistic analyses of DNA sequence data suggest that the present subdivisions and rankings are largely invalid. Far more subgenera would seem to warrant recognition, with ''Leptostemonum'' being the only one that can at present be clearly subdivided into sections. Notably, it includes as a major lineage several members of the traditional sections ''Cyphomandropsis'' and the old genus ''Cyphomandra''.

A recent study built a densely sampled species-level phylogeny for ''Solanum'' comprising 60% of all accepted species based on full plastome dataset and nuclear target-capture data. While the taxonomic framework of ''Solanum'' remained stable, researchers observed gene tree conflicts and discordance between phylogenetic trees generated from the target-capture and plastome datasets. The latter corresponded to regions with short internodal branches, and network analysis and polytomy tests suggested the backbone is composed of three polytomies found at different evolutionary depths. The strongest area of discordance, near the crown node of Solanum, was found to be a hard polytomy. Currently, the most likely explanation for the discordance along the backbone of ''Solanum'' is due to incomplete lineage sorting (ILS) caused by rapid speciation. Presence of short internal branches is typical of ILS in lineages with large population sizes and high mutation rates. This fits with the biology of ''Solanum'' in general, which is typically known to contain “weedy”, disturbance-loving pioneer species resilient to change. Many species are known to have large geographical ranges and ecological amplitude. Some of the weedy characteristics found in these species include the ability to improve fitness and defense traits in response to disturbance, as well as having allelopathic properties which allow them to establish themselves to the detriment of native vegetation. If such characteristics were present in ancestral Solanum, they could have promoted rapid speciation across the globe, followed by rapid morphological evolution and speciation within areas. The patterns observed here could possibly be the result of three major rapid speciation “pulses” across the evolutionary history of Solanum. The idea of an ecologically opportunistic ancestor is supported by the tendency of many of the major clades to occupy periodically highly stressed and disturbed habitats, including flooded varzea forests, hyper-arid deserts, and highly disturbed and dynamic open mid-elevation Andean montane habitats, where landslides are among the most common areas where many of the species are found. The idea that well-supported and fully bifurcating phylogenies are a requisite for evolutionary studies is built on the premise that such trees are the accurate way of representing evolution. The shift in systematics from “tree”- to “bush”-like thinking, where polytomies and reticulate patterns of evolution are considered as acceptable or real, comes from the accumulation of studies finding similar unresolvable phylogenetic nodes, despite using different large-scale genomic sampling strategies and various analytical methods. We argue that acknowledging and embracing polytomies and reticulation is crucial if we are to design research programs aimed at understanding the biology of large and rapidly radiating lineages, such as the large and economically important Solanum.

Subgenus ''Bassovia''

Section ''Allophylla''
* '' Solanum granuloso-leprosum''
Section ''Cyphomandropsis''
* '' Solanum glaucophyllum'' Desf. – Waxy-leaved nightshade
Section ''Pachyphylla''
* ''Solanum betaceum'' Cav. – Tamarillo
* '' Solanum exiguum''
* '' Solanum roseum''

Subgenus ''Leptostemonum''

Section ''Acanthophora''
* '' Solanum aculeatissimum'' Jacq. – Indian nightshade
* '' Solanum atropurpureum'' Schrank – Five-minute plant
* '' Solanum capsicoides'' – Cockroach berry, ''polohauaiʻi'' ( Polynesian)
* '' Solanum mammosum'' – Nipplefruit, titty fruit, cow's udder, " apple of Sodom"
* ''Solanum palinacanthum'' Dunal
* '' Solanum viarum'' Dunal – Tropical soda apple
Section ''Androceras'': 12 spp.
* Series ''Androceras''
* Series ''Violaceiflorum''
* Series ''Pacificum''
Section ''Anisantherum''

Section ''Campanulata''

Section ''Crinitum''

Section ''Croatianum''

Section ''Erythrotrichum''
* '' Solanum robustum'' H.L.Wendl. – Shrubby nightshade
Section ''Graciliflorum''

Section ''Herposolanum''
* '' Solanum wendlandii'' Hook.f. – Giant potatocreeper
Section ''Irenosolanum''
* '' Solanum incompletum'' Dunal – ''Pōpolo kū mai'' (Hawaii)
* '' Solanum nelsonii'' Dunal – Nelson's horsenettle, ''Ākia'' (Hawaii)
* '' Solanum sandwicense'' Hook. & Arn. – Hawaiian horsenettle, ''Pōpoloaiakeakua'' (Oahu, Kauai)
Section ''Ischyracanthum''

Section ''Lasiocarpa''
* '' Solanum lasiocarpum'' Dunal
* '' Solanum pseudolulo'' – ''lulo de perro'' (Colombia)
* '' Solanum quitoense'' – ''lulo'' (Colombia), ''naranjilla'' (Ecuador)
* '' Solanum sessiliflorum'' – Cocona
Section ''Melongena''
* '' Solanum aculeastrum'' – Soda apple, sodaapple nightshade, goat apple, poison apple, " bitter-apple"
* '' Solanum campechiense'' – Redberry nightshade
* '' Solanum carolinense'' – Carolina horsenettle, radical weed, sand brier, devil's tomato, "bull nettle", "tread-softly", "apple of Sodom", "wild tomato" (southeastern United States)
* '' Solanum cataphractum'' (northern Western Australia, including Coronation Island)
* '' Solanum citrullifolium'' A.Braun – Watermelon nightshade (southern United States)
* ''Solanum dimidiatum'' Raf. – Torrey's nightshade
* '' Solanum elaeagnifolium'' – Silver-leaved nightshade, prairie berry, silverleaf nettle, white horsenettle, silver nightshade, "bull-nettle", "trompillo" (Spanish); Silver-leaf bitter-apple, ''satansbos'' (South Africa)
* '' Solanum heterodoxum'' Dunal – Melon-leaved nightshade
* ''Solanum incanum'' L.
* '' Solanum linnaeanum'' – Devil's apple, " apple of Sodom"
* ''Solanum macrocarpon'' L.
* '' Solanum marginatum'' L.f. – White-margined nightshade
* '' Solanum melongena'' – Eggplant, aubergine (including ''S. ovigerum'')
* '' Solanum rostratum'' Dunal – Buffalo bur, Texas thistle
* '' Solanum sisymbriifolium'' Lam. – Sticky nightshade, fire-and-ice
* ''Solanum virginianum'' L.
Section ''Micracantha''
* ''Solanum jamaicense'' Mill. – Jamaican nightshade
* ''Solanum lanceifolium'' Jacq. – Lance-leaved nightshade
* ''Solanum tampicense'' Dunal – Wetland nightshade
Section ''Monodolichopus''

Section ''Nycterium''

Section ''Oliganthes''
* ''Solanum aethiopicum'' – Ethiopian eggplant, nakati, mock tomato, Ethiopian nightshade; including ''S. gilo'' (scarlet eggplant, Gilo or ''jiló'')
* ''Solanum centrale'' – Australian desert raisin, bush raisin, bush sultana, " bush tomato", ''akatjurra'' (Alyawarre), ''kampurarpa'' (Pitjantjatjara language, Pitjantjatjara), ''merne akatyerre'' (Arrernte language, Arrernte), ''kutjera''
* ''Solanum cleistogamum'' – "bush tomato", ''merne mwanyerne'' (Arrernte)
* ''Solanum ellipticum'' – Potato bush, "bush tomato"
* ''Solanum pyracanthos'' Lam. – Porcupine tomato, Devil's Thorn
* ''Solanum quadriloculatum'' F.Muell. – "bush tomato", "wild tomato" (Australia)
Section ''Persicariae''
* ''Solanum bahamense'' L. – Bahama nightshade, canker berry, ''berengena de playa''
* ''Solanum ensifolium'' Dunal – Erubia
Section ''Polytrichum''

Section ''Pugiunculifera''

Section ''Somalanum''

Section ''Torva''
* ''Solanum asteropilodes''
* ''Solanum chrysotrichum'' Schltdl. – Giant devil's-fig
* ''Solanum lanceolatum'' – Orangeberry nightshade
* ''Solanum paniculatum'' – Jurubeba
* ''Solanum torvum'' – Turkey berry, devil's fig, prickly nightshade, shoo-shoo bush, wild eggplant, pea eggplant

Subgenus ''Lyciosolanum''

* ''Solanum guineense'' L.

Subgenus ''Solanum sensu stricto''

Section ''Afrosolanum''

Section ''Anarrhichomenum''
* ''Solanum baretiae''
Section ''Archaesolanum''
* ''Solanum aviculare'' – Poroporo (New Zealand), kangaroo apple (Australia)
Section ''Basarthrum''
* ''Solanum catilliflorum''
* ''Solanum muricatum'' – Pepino dulce, pepino melon, melon pear, "pepino", "tree melon"
* ''Solanum perlongistylum''
* ''Solanum tergosericeum''
Section ''Benderianum''

Section ''Brevantherum''
* ''Solanum bullatum''
* ''Solanum erianthum'' D.Don – Potato tree, "mullein nightshade"
* ''Solanum mauritianum'' – Woolly nightshade, ear-leaved nightshade, flannel weed, bugweed, tobacco weed, kerosene plant, "wild tobacco" (Australia)
* ''Solanum evolvuloides''
Section ''Dulcamara''
* ''Solanum crispum'' – Chilean potato vine, Chilean nightshade, Chilean potato tree
* ''Solanum dulcamara'' – Bittersweet
* ''Solanum imbaburense''
* ''Solanum laxum'' Spreng. – Jasmine nightshade
* ''Solanum leiophyllum''
* ''Solanum seaforthianum'' Andrews – Brazilian nightshade
* ''Solanum triquetrum'' Cav. – Texas nightshade
* ''Solanum wallacei'' – Wallace's nightshade, Catalina nightshade, Clokey's nightshade, "wild tomato" (including ''S. clokeyi'')
* ''Solanum xanti'' – Purple nightshade, San Diego nightshade
Section ''Herpystichum''

Section ''Holophylla''
* ''Solanum diphyllum'' L. – Twin-leaved nightshade
* ''Solanum pseudocapsicum'' – Jerusalem cherry, Madeira winter cherry, "winter cherry" (including ''S. capsicastrum'')
* ''Solanum pseudoquina'' (including ''S. inaequale'' Vell.)
Section ''Juglandifolia''
* ''Solanum juglandifolium''
* ''Solanum ochranthum''
Section ''Lemurisolanum''

Section ''Lycopersicoides''
* ''Solanum lycopersicoides'' Dunal – Peruvian wolfpeach
* ''Solanum sitiens''
Section ''Lycopersicon''

* ''Solanum arcanum'' Peralta – "wild tomato"
* ''Solanum chilense''
* ''Solanum corneliomulleri''
* ''Solanum huaylasense'' Peralta
* ''Solanum peruvianum'' L. – Peruvian nightshade, "wild tomato"
* ''Solanum cheesmaniae'' (L.Riley) Fosberg
* ''Solanum chmielewskii''
* ''Solanum galapagense'' S.C.Darwin & Peralta
* ''Solanum habrochaites''
* ''Tomato, Solanum lycopersicum'' – Tomato
* ''Solanum neorickii''
* ''Solanum pennellii''
* ''Solanum pimpinellifolium'' – Currant tomato

Section ''Macronesiotes''

Section ''Normania''

* †''Solanum nava'' (?)
Section ''Petota''
* ''Solanum albornozii''
* ''Solanum bulbocastanum'' – Ornamental nightshade
* ''Solanum bukasovii'' Juz. ex Rybin
* ''Solanum burtonii''
* ''Solanum cardiophyllum'' – Heart-leaved nightshade
* ''Solanum chilliasense''
* ''Solanum commersonii'' Dunal – Commerson's nightshade
* ''Solanum demissum'' Lindl. – Dwarf wild potato
* ''Solanum jamesii'' – Wild potato
* ''Solanum minutifoliolum''
* ''Solanum paucijugum''
* ''Solanum phureja'' Juz. & Bukasov
* ''Solanum pinnatisectum'' Dunal – Tansy-leaved nightshade
* ''Solanum regularifolium''
* ''Solanum stoloniferum'' Schltdl. – Tigna potato, Fendler's horsenettle
* ''Solanum stenotomum'' (including ''S. goniocalyx'')
* ''Solanum ternatum'' (including ''S. ternifolium'')
* ''Potato, Solanum tuberosum'' – Potato
Section ''Pteroidea''

Section ''Quadrangulare''

Section ''Regmandra''

Section ''Solanum''
* ''Solanum adscendens'' Sendtner – Sonoita nightshade (Americas)
* ''Solanum americanum'' Philip Miller, Mill. – American nightshade, American black nightshade, glossy nightshade (Americas, Hawaii)
* ''Solanum chenopodioides'' Lam. – Goosefoot nightshade, slender nightshade (including ''S. gracilius'')
* ''Solanum douglasii'' Dunal – Green-spotted nightshade
* ''Solanum interius'' Rydb.
* Solanum melongena L.
* ''Solanum nigrescens'' M.Martens & Galeotti – Divine nightshade
* ''Solanum nigrum'' L. – European black nightshade, "black nightshade"
* ''S. nigrum guineense'' – "Garden Huckleberry"
* ''Solanum pseudogracile'' Heiser – Glowing nightshade
* ''Solanum ptychanthum'' – West Indian nightshade, Eastern black nightshade
* ''Solanum retroflexum'' – Wonderberry, sunberry
* ''Solanum sarrachoides'' – Hairy nightshade
* ''Solanum scabrum'' Mill. – Garden huckleberry
* ''Solanum triflorum'' Nutt. – Cut-leaved nightshade
* ''Solanum villosum'' Mill. – Yellow nightshade

Other notable species

*''Solanum abutiloides'' – Dwarf tamarillo
*''Solanum amygdalifolium'' Steud.
* ''Solanum bellum''
* ''Solanum cajanumense''
* ''Solanum chimborazense''
* ''Solanum chrysasteroides''
* ''Solanum cinnamomeum''
* ''Solanum conocarpum'' Rich. ex Dunal – Marron bacoba
* ''Solanum cowiei'' Martine
* ''Solanum cremastanthemum''
* ''Solanum davisense'' Whalen – Davis' horsenettle
* ''Solanum densepilosulum''
* ''Solanum donianum'' Walp. – Mullein nightshade
* ''Solanum dolichorhachis''
* ''Solanum fallax''
* ''Solanum ferox'' L. – Hairy-fruited eggplant, Thai hairy-fruited eggplant
* ''Solanum fortunense''
* ''Solanum furcatum'' – Forked nightshade
* ''Solanum glabratum'' Dunal
* ''Solanum haleakalaense'' H.St.John
* ''Solanum hindsianum'' Benth. – Hinds' nightshade
* ''Solanum hypermegethes''
* ''Solanum hypocalycosarcum''
* ''Solanum interandinum''
* ''Solanum latiflorum''
* ''Solanum leucodendron''
* ''Solanum lumholtzianum'' Bartlett – Sonoran nightshade
* ''Solanum luteoalbum'' (including ''S. semicoalitum'')
* ''Solanum lycocarpum'' – Wolf apple, ''fruta-de-lobo, lobeira'' (Brazil)
* ''Solanum melissarum'' Bohs
* ''Solanum nudum'' Dunal – Forest nightshade
* ''Solanum ovum-fringillae''
* ''Solanum paralum''
* ''Solanum parishii'' A.Heller – Parish's nightshade
* ''Solanum physalifolium'' Rusby
* ''Solanum pinetorum''
* ''Solanum polygamum'' Vahl – Cakalaka berry
* ''Solanum pyrifolium'' Lam.
* ''Solanum pubescens'' Willd.
* ''Solanum riedlei'' Dunal – Riedle's nightshade
* ''Solanum rudepannum'' Dunal
* ''Solanum rugosum'' Dunal – ''tabacon aspero''
* ''Solanum sibundoyense''
* ''Solanum sodiroi'' (including ''S. carchiense'')
* ''Solanum sycocarpum''
* ''Solanum tenuipes'' Bartlett – Fancy nightshade
* ''Solanum tobagense''
* ''Solanum trilobatum'' L.
* ''Solanum umbelliferum'' – Bluewitch nightshade
* ''Solanum verrogeneum'' Berengena
* ''Solanum violaceum'' Ortega
* ''Solanum viride'' Spreng. – Green Nightshade
* ''Solanum woodburyi'' Howard – Woodbury's nightshade

Formerly placed here

Some plants of other genera were formerly placed in ''Solanum'':
* ''Chamaesaracha coronopus'' (as ''S. coronopus'')
* ''Lycianthes biflora'' (as ''S. multifidum'' Buch.-Ham. ex D.Don)
* ''Lycianthes denticulata'' (as ''S. gouakai'' var. ''angustifolium'' and var. ''latifolium'')
* ''Lycianthes lycioides'' (as ''S. lycioides'' var. ''angustifolium'')
* ''Lycianthes mociniana'' (as ''S. uniflorum'' Dunal in Poir. and ''S. uniflorum'' Sessé & Moc.)
* ''Lycianthes rantonnetii'' (as ''S. rantonnetii'', ''S. urbanum'' var. ''ovatifolium'' and var. ''typicum'')
* Undetermined species of ''Lycianthes'' have been referred to under names such as ''Solanum chrysophyllum, S. chrysophyllum'', ''S. ciliatum'' Blume ex Miq., ''S. corniculatum'' Hiern, ''Solanum lanuginosum, S. lanuginosum'', ''Solanum loxense, S. loxense'', ''Solanum mucronatum, S. mucronatum'', ''S. retrofractum'' var. ''acuminatum'', ''S. violaceum'' Blume, ''S. violifolium'' f. ''typicum'', ''S. virgatum'' notst ''β albiflorum'', ''S. uniflorum'' Lag. or ''S. uniflorum'' var. ''berterianum''.

References

External links

*
*

Meet the TomTato: Tomatoes and potatoes grown as one – CBS News
(September 26, 2013)

{{Taxonbar, from=Q146555

Solanum,
Solanaceae genera
Medicinal plants