Solanum petrophilum

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Rock nightshade
Solanum petrophilum plant.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. petrophilum
Binomial name
Solanum petrophilum
Solanum petrophilum distribution.jpg
Occurrence data from AVH

Solanum petrophilum, commonly known as rock nightshade or prickly nightshade, is an Australian native perennial herbaceous plant that belongs to the family Solanaceae. Solanaceae has a worldwide distribution and also contains important food species such as the tomato ( Solanum lycopersicum ), peppers ( Capsicum annuum ), and potatoes ( Solanum tuberosum ). [2]

Contents

Solanum is a large genus in the Solanaceae family with over 100 different species in the family occurring in Australia, and a large majority of them also being native. [3] Particularly many species occur in arid and semi-arid areas, though many also have wide distributions excluding alpine, saline and aquatic habitats. [3]

Description

Solanum petrophilum is a small many branched prickly shrub that grows between 20-60 cm high, sometimes with a sprawling habit. [2] [4] All parts of the plant, excluding the petals, contain a sparse to moderately dense tomentum of stellate hairs, with an additional coverage of 1 cm long prickles. [5] These prickles are usually straight and vary between reddish and brownish in colour and are lesser in number compared to other species in the S. petrophilum complex. [2] [4] [5]

Leaves

Solanum petrophilum leaves are 2-8 cm long ovate-lanceolate to oblong in shape, usually greyish-green in colour on the upper leaf and greenish-white to grey or yellow on the lower leaf surface. [2] [4] The leaf margin has 3-6 undulating shallow or deep rounded lobes and has a truncate to cordate base. [2] [4] [5] The prickles occur on the mid-vein of the leaf and sometimes on the mid-vein and lateral veins. [5]

Flowers

Native bee foraging on Solanum petrophilum flower Native bee foraging on Solanum petrophilum flower.jpg
Native bee foraging on Solanum petrophilum flower

The inflorescence of S. petrophilum is a 3-10 flowered cyme, with 5-10 mm long peduncles and pedicels and 50 mm rachis. [2] [4] The calyx is 8-10 mm long, usually with lobes 6-7 mm in length. It has a purple corolla that is shallowly campanulate-rotate in shape and 25-30 mm in diameter when fully open. [2] [3] [4] The 4-6 mm anthers are a prominent yellow and loosely erect. [2] [5] It primarily flowers in spring from Aug-Oct, though it can also flower year-round. [2] [4]

Fruit

Solanum petrophilum fruit Solanum petrophilum.jpg
Solanum petrophilum fruit

The fruiting pedicel and peduncle are firm and connected to a 10 mm calyx that has long linear lobes to enclose the globular fruit. [2] [5] The fruit is an 8-15 mm diameter, two-celled berry that is bright green at first, yellows as it matures and finally hardens and dries to a pale bony or light brown colour. [2] [4] [5] [6] There are usually 1-3 berries per inflorescence which can often remain on the main plant for quite some time. [2] [5] The seeds are compressed and 1-1.5 mm long and can be light-brown or grey-brown in colour. [2] [3] [5]

Distribution

Solanum petrophilum is widespread throughout the arid areas of inland Australia. It primarily occurs in South Australia such as the Gawler and Flinders Ranges, with some distribution in the Northern Territory, the Coolgardie area of Western Australia and the sandplain and sandstone hills of New South Wales near Broken Hill. [2] [3] [4] It prefers rocky hill and outcrop habitats or near the base of ranges, but can also tolerate a variety of sites such as creek banks and undulating plains. [2] [5]

Taxonomy

Solanum petrophilum was formally described by Ferdinand Von Mueller in 1853 after he collected specimens of the plants from the Flinders Ranges. [5] Slight characteristic differences have been found in plants in different locations, but these have not but found significant enough to be classified as subspecies of S. petrophilum. [5] Though there have been other species such as S. lobatum, S. osteocarpum and S. pallidifolium that are distinct enough to be classified as their own species, but similar enough to S. petrophilum to be considered as part of the S. petrophilum complex. [5]

Toxicity

The berries of S. petrophilum have long been thought to be toxic to livestock, though no clear evidence has proven this. [7] It is likely due to the presence of toxic steroidal glycoalkaloids in the berries which can be harmful if ingested. [8] They are a natural defence in many Solanum species against snails and insects and have the potential to suppress the germination of other competing plants. [8] Some other Australian native Solanum species such as S. centrale are important food sources in arid Australia, though can still be toxic when unripe, but S. petrophilum is still treated with caution and avoided as a food source. [8] [9]

Conversely, in studies of the Yellow-footed Rock Wallabies (Petrogale xanthopus), S. petrophilum was found to be a major contributor to its diet, particularly in summer and autumn when there is more fruit present and a lower proportion of other herbs. [10]

Conservation status

Solanum petrophilum is currently not listed as a species of concern.

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>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, and Australia. The stem and undersides of larger leaf veins are covered with prickles.

<i>Solanum mauritianum</i> Species of tree

Solanum mauritianum is a small tree or shrub native to South America, including Northern Argentina, Southern Brazil, Paraguay and Uruguay. Its common names include earleaf nightshade, woolly nightshade, flannel weed, bugweed, tobacco weed, tobacco bush, wild tobacco and kerosene plant.

<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 genus Solanum, 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. A tendency exists in literature to incorrectly refer to many of the other "black nightshade" species as "Solanum nigrum".

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

Solanum elaeagnifolium, the silverleaf nightshade or silver-leaved nightshade, is a common native plant to parts of the southwestern USA, and sometimes weed of western North America and also found in South 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". The plant is also endemic to the Middle East.

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

Brunfelsia is a genus of flowering plants belonging to subfamily Petunioideae of the nightshade family Solanaceae. The 50 or so species have been grouped into the three sections: Brunfelsia, Franciscea and Guianenses, which differ significantly in both distribution and characteristics, although molecular data have revealed that only two sections are natural (monophyletic), namely the Caribbean section Brunfelsia and a common section for all South American species. Linnaeus named the genus for the early German herbalist Otto Brunfels (1488–1534).

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

Solanum physalifolium, known as hoe nightshade, Argentine nightshade, green nightshade and hairy nightshade, is a species in the family Solanaceae. Native to Argentina, Bolivia and Chile, it is widely naturalized in Australia, New Zealand, Europe, western Canada and the north western United States. Solanum physalifolium has been widely but incorrectly known as Solanum sarrachoides, a different species. It has been listed as a noxious weed in the US states of Kansas and Michigan under this misapplied name.

<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.

<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.

<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 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>Solanum evolvuloides</i>

Solanum evolvuloides is a species of Solanum, which was first described in 2011 by Giacomin & Stehmann. Solanum evolvuloides belongs to section Gonatotrichum, a small group assigned to the Brevantherum clade of the genus Solanum. It resembles Solanum turneroides Chodat, sharing with it heterandry, and Solanum parcistrigosum Bitter, with which it shares a similar habit and pubescence. Despite these similarities, the species can be recognized by its ovate-elliptic to cordiform leaf shape and more membranaceous leaf texture than the other species in the section, and stem, inflorescence axes, and calyx vestiture mainly composed of glandular hairs. Solanum evolvuloides is known to occur only in southeastern of Bahia state, Brazil, and in a preliminary assessment of the International Union for Conservation of Nature (IUCN) criteria can be considered a threatened species.

<i>Solanum opacum</i> Species of plant in the family Solanaceae

Solanum opacum is a species of flowering plant in the family Solanaceae. It is referred to by the common names green berry nightshade, or morelle verte and is a sprawling annual native to eastern Australia. It is part of the black nightshade group of Solanum species.

<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">African nightshade</span> Name for several species of flowering plant

African nightshades are several species of plants in the section Solanum of the genus Solanum, that are commonly consumed as leafy vegetables and herbs. African nightshades are grown in both high and lowland areas in West and East Africa, particularly in Nigeria and Cameroon. There is a large variation in diversity of the African nightshades, which have many nutritional and medicinal benefits, even though the family of nightshade is commonly known as comprising dangerous weeds or poisonous plants. Species known as African nightshade include Solanum scabrum, Solanum villosum, Solanum nigrum, and Solanum americanum. Other common names for African nightshade are Black nightshade and Narrow-leaved nightshade. Local names of African nightshade include managu (Kikuyu), mnavu (Swahili), amanagu (Kisii), namasaka (Luhya), osuga (Luo), isoiyot (Kipsigis), kitulu (Kamba), ormomoi (Maa), ndunda (Taita), nsugga (Luganda), sochot (Keiyo), and esisogho (Lukhonzo).

<span class="mw-page-title-main">Yellow-fruit nightshade</span> Species of fruit and plant

Solanum virginianum, also called Surattense nightshade, yellow-fruit nightshade, yellow-berried nightshade, Indian nightshade,Thai green eggplant, or Thai striped eggplant, is a medicinal plant used mostly in India. Some parts of the plant, like the fruit, are poisonous. The common name is Kantakari. Solanum surattense Burm. f. and Solanum xanthocarpum Schrad. and Wendl. are synonyms of Solanum virginianum L..

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

Solanum pachyandrum, known as bombona, is a spine-forming vine of the Solanum genus. It is native to southwestern Ecuador and northwestern Peru where the large juicy fruit is commonly eaten and considered a treat by children. Although the plant has been known and consumed by the indigenous people of that land, it was only published scientifically in 1914 by German botanist Friedrich August Georg Bitter.

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

Solanum sturtianum, commonly known as Thargomindah nightshade, is a flowering plant in the family Solanaceae. It is an upright shrub with grey-green leaves and purple flowers. This species is endemic to Australia.

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

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

References

  1. Mueller, Ferdinand (1853). Diagnoses et descriptiones plantarum novarum, quas in Nova Hollandia australi praecipue in regionibus interioribus. Linnaea 25: 367–445.
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Jessop, J; Toelken, H. R.; Black, J. M. (1986). Flora of South Australia. South Australian Government Printing Division.
  3. 1 2 3 4 5 Purdie, R.W.; Symon, D. e.; Haegi, L. (1982). Flora of Australia. Solanaceae. Vol. 29.
  4. 1 2 3 4 5 6 7 8 9 Cunningham, G. M.; Mulham, W. E.; Milthorpe, P. L.; Leigh, J. H. (2011). Plants of western new South Wales. CSIRO publishing.
  5. 1 2 3 4 5 6 7 8 9 10 11 12 13 Bean, A. R. (2016). "The Solanum petrophilum complex (Solanaceae) revised, with the description of three new species". Journal of the Adelaide Botanic Gardens (29): 23-36.
  6. Symon, D. E. (1987). "Placentation patterns and seed numbers in Solanum (Solanaceae) fruits". Journal of the Adelaide Botanic Garden.
  7. Everist, S. L. (1981). Poisonous plants of Australia. Angus & Robertson.
  8. 1 2 3 McKenzie, R. A. (2012). Australia's poisonous plants, fungi and cyanobacteria : a guide to species of medical and veterinary importance. CSIRO Publishing.
  9. Latz, P. K. (1995). Bushfires & bushtucker : Aboriginal plant use in Central Australia. IAD Press.
  10. Copley, P. B.; Robinson, A. C. (1983). "Studies on the yellow-footed rock-wallaby, Petrogale xanthopus Gray (Marsupialia: Macropodidae). 2. Diet". Wildlife Research. 10 (1): 63-76. doi:10.1071/WR9830063.