Sedum album subsp. rupimelitense

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Sedum album subsp. rupimelitense
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Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Saxifragales
Family: Crassulaceae
Genus: Sedum
Species:
Subspecies:
S. a. subsp. rupimelitense
Trinomial name
Sedum album subsp. rupimelitense
Mifsud, R.Stephenson & Thiede

Sedum album subsp. rupimelitense is a plant subspecies belonging to the Crassulaceae family. It is an endemic taxon in the Maltese Islands and is found growing on sea cliffs and rock faces. This taxon is often referred to as the Maltese stonecrop due to its growth on rocky outcrops. [1]

Contents

Description

Sedum album subsp. rupimelitense is a succulent plant with fleshy leaves that form rosettes. The leaves are green, linear-elliptic to ovoid, and are covered in a waxy coating to prevent water loss. The plant has a slender flexible woody stem that produces small white flowers during May and June. It produces sterile seeds and propagates vegetatively. [1]

Distribution

Sedum album subsp. rupimelitense is found exclusively in the Maltese Islands, where it is endemic. It is found growing on rocky outcrops and sea cliffs on the islands of Malta and Gozo. The plant is not known to grow anywhere else in the world. The population is usually divided into small fragments, with the exception of a 1.5km stretch between Rdum Dikkiena and San Ġorġ tal-Fawwara. The population's strict rock-dwelling habitat is gradually decreasing due to natural causes like erosion, landslides, and cliff collapses. [1]

Sedum album subsp. rupimelitense leaves showing papillae .TS 20000101 010139.jpg
Sedum album subsp. rupimelitense leaves showing papillae

Habitat

The subspecies is a xerophyte, meaning that it is adapted to grow in dry conditions. It is found growing on rocky outcrops and sea cliffs where there is little soil and water, and where other plants struggle to survive. The plant is also able to tolerate high levels of salt, making it well-suited to its coastal habitat. [1]

Conservation status

The subspecies is listed as Endangered on the IUCN Red List. The plant is threatened by a number of factors, including habitat destruction and degradation due to urbanisation and quarrying activities. In addition, the plant is also at risk from the impacts of climate change, such as increased temperatures and reduced rainfall. [1]

Conservation efforts

Efforts to conserve S. album subsp. rupimelitense are ongoing in the Maltese Islands. The plant is protected under Maltese law, which prohibits the uprooting or destruction of wild plants. In addition, the plant is included in a number of conservation initiatives that aim to conserve Malta's biodiversity. [1]

Related Research Articles

<span class="mw-page-title-main">Crassulaceae</span> Family of flowering plants

The Crassulaceae, also known as the stonecrop family or the orpine family, are a diverse family of dicotyledon flowering plants characterized by succulent leaves and a unique form of photosynthesis, known as Crassulacean acid metabolism (CAM). Flowers generally have five floral parts. Crassulaceae are usually herbaceous but there are some subshrubs, and relatively few treelike or aquatic plants. Crassulaceae are a medium size monophyletic family in the core eudicots, among the order Saxifragales, whose diversity has made infrafamilial classification very difficult. The family includes approximately 1,400 species and 34–35 genera, depending on the circumscription of the genus Sedum, and distributed over three subfamilies. Members of the Crassulaceae are found worldwide, but mostly in the Northern Hemisphere and southern Africa, typically in dry and/or cold areas where water may be scarce, although a few are aquatic.

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

Sedum is a large genus of flowering plants in the family Crassulaceae, members of which are commonly known as stonecrops. The genus has been described as containing up to 600 species, subsequently reduced to 400–500. They are leaf succulents found primarily in the Northern Hemisphere, but extending into the southern hemisphere in Africa and South America. The plants vary from annual and creeping herbs to shrubs. The plants have water-storing leaves. The flowers usually have five petals, seldom four or six. There are typically twice as many stamens as petals. Various species formerly classified as Sedum are now in the segregate genera Hylotelephium and Rhodiola.

<i>Dudleya</i> North American succulent genus

Dudleya, commonly known as liveforevers is a genus of rosette-forming succulent plants in the stonecrop family, Crassulaceae, consisting of about 68 taxa in southwestern North America and Guadalupe Island. The species come in many forms, some large and evergreen, others geophytic and deciduous. Yet, despite their dramatic variations in appearance, most species readily hybridize. The flowers of Dudleya have parts numbered in fives, with the petals arranged in tubular, star-shaped, and bell-shaped forms and, when fruiting, are filled with tiny, ovoid-crescent-shaped seeds.

<i>Hylotelephium telephium</i> Species of genus Hylotelephium, in the family Crassulaceae (stonecrop family)

Hylotelephium telephium, known as orpine, livelong, frog's-stomach, harping Johnny, life-everlasting, live-forever, midsummer-men, Orphan John and witch's moneybags, is a succulent perennial groundcover of the family Crassulaceae native to Eurasia. The flowers are held in dense heads and can be reddish or yellowish-white. A number of cultivars, often with purplish leaves, are grown in gardens as well as hybrids between this species and the related Hylotelephium spectabile (iceplant), especially the popular 'Herbstfreude'. Occasionally garden plants may escape and naturalise as has happened in parts of North America.

<i>Dudleya abramsii <span style="font-style:normal;">subsp.</span> setchellii</i> Species of succulent

Dudleya abramsiisubsp. setchellii, known by common name as the Santa Clara Valley dudleya or Santa Clara Valley liveforever, is a member of the Dudleya genus of succulent perennials, members of the family Crassulaceae. The Santa Clara Valley dudleya, endemic to the Santa Clara Valley region in the southern San Francisco Bay Area, was listed on 3 February 1995, as an endangered species. It is considered to be a subspecies of Dudleya abramsii, but its taxonomic status is still unclear. Its closest relative is Dudleya cymosa subsp. paniculata, which is a morphologically similar sister taxon.

<i>Helichrysum panormitanum <span style="font-style:normal;">subsp.</span> melitense</i> Species of plant

Helichrysum panormitanum subsp. melitense, synonym Helichrysum melitense, is a subspecies of flowering plant in the family Asteraceae and is endemic to Malta, specifically to the island of Gozo. It is known as the Maltese everlasting. It can be found in Dwejra, and in cliffs in Gozo near Fungus Rock. Its natural habitats are Mediterranean-type shrubby vegetation on Coastal garigue and vertical sheer cliffs. Recently, it was recorded in new locations on the island of Gozo. This plant is on the decline in the wild, and it is threatened by habitat loss. It is very easy to cultivate, and it is gaining ornamental popularity amongst the locals.

<i>Dudleya abramsii <span style="font-style:normal;">subsp.</span> calcicola</i> Species of succulent

Dudleya abramsiisubsp.calcicola is a succulent plant known by the common name limestone liveforever, or limestone dudleya. It is endemic to California, where it is a rare resident of limestone outcroppings and rocky slopes in the southern Sierra Nevada and nearby mountains and foothills. It was formerly regarded as Dudleya calcicola.

<i>Dudleya edulis</i> Species of succulent

Dudleya edulis is a species of perennial succulent plant known by the common names fingertips, lady fingers, mission lettuce and the San Diego dudleya. The common name denotes the finger-like shape of the leaves, while the specific epithet edulis refers to the use of the young scapes as food by the Kumeyaay. It is native to Southern California and northern Baja California, and grows on rocky hillsides, cliffs, and bare rock.

<i>Sedum album</i> Species of flowering plant

Sedum album, the white stonecrop, is a flowering plant of the genus Sedum in the family Crassulaceae. It is found in the northern temperate regions of the world, often growing in crevices or free-draining rocky soil. As a long-day plant it grows vegetatively for most of the year and flowers in summer.

<i>Cotyledon tomentosa</i> Species of succulent

Cotyledon tomentosa is a species of flowering plant in the family Crassulaceae, native to South Africa. It is a succulent evergreen shrub with large chunky ovate fuzzy green leaves. Its autonymous subspecies is known as the bear's paw because of the prominent "teeth" at the tips of its leaves. It forms large orange bell-shaped flowers in spring. In its native habitat, the Little Karoo region of South Africa, Cotyledons usually grow in rocky quartz fields where they have excellent drainage provided by very porous soil.

<i>Sedum eastwoodiae</i> Species of plant in the family Crassulaceae

Sedum eastwoodiae is a rare species of flowering plant of the stonecrop Crassulaceae family. It is known by its common name Red Mountain stonecrop. It is endemic to Mendocino County, California, where it is known from only four occurrences on Red Mountain, near Ukiah. The total number of plants in existence is estimated to be around 5300. They can be found on steep, exposed, rocky mountain slopes of serpentine substrate. This species has also been treated as a subspecies of Sedum laxum.

<i>Sedum lanceolatum</i> Species of succulent flowering stonecrop

Sedum lanceolatum is a species of flowering plant in the family Crassulaceae known by the common names spearleaf stonecrop and lanceleaf stonecrop.

<i>Sedum spathulifolium</i> Species of succulent

Sedum spathulifolium is a species of flowering plant in the family Crassulaceae known by the common names broadleaf stonecrop, yellow stonecrop, and spoon-leaved stonecrop. An evergreen perennial, it is native to western North America from British Columbia to southern California, where it can be found often in shade in many types of rocky habitat in coastal and inland hills and mountains.

Sedum moraniii is a rare species of flowering plant in the family Crassulaceae known by the common name Rogue River stonecrop. It is endemic to Oregon in the United States, where it only grows in Josephine County next to the Rogue River.

<i>Sedum adolphi</i> Species of succulent

Sedum adolphi, the coppertone stonecrop or golden Sedum, is a species of succulent plant in the family Crassulaceae. It is native to Mexico, where it grows in rocky terrain and on cliff faces. It has also become naturalized in Sicily and the Canary Islands. It is known for its bright orange-copper leaves and white flowers that bloom in the spring.

<i>Dudleya saxosa <span style="font-style:normal;">subsp.</span> collomiae</i> Subspecies of succulent plant

Dudleya saxosa subsp. collomiae, known by the common name Gila County liveforever, is a subspecies of perennial succulent plant within the genus Dudleya native to central Arizona. It is characterized by showy bright-yellow flowers on an upright inflorescence colored pink, red or orange. The leaves are green or covered in a white, powdery wax. This species is found growing in rocky slopes, canyons, and crevices, and often on Sonoran Desert sky islands.

<i>Dudleya cymosa <span style="font-style:normal;">subsp.</span> pumila</i> Subspecies of plant

Dudleya cymosasubsp. pumila, most commonly known as the low canyon dudleya, chalky canyon dudleya or California live-forever, is a species of perennial succulent plant. It has diamond to spoon shaped leaves, sometimes coated with a fine white powder, and in May through July, bright red, orange or yellow flowers adorn the short inflorescence. A leaf succulent primarily found growing in rocky cliffs and slopes, it is endemic to California, and grows in the Transverse Ranges and South Coast Ranges, with some outlying populations. A variable plant, in some localities it is difficult to distinguish from other plants in the genus.

<i>Calendula suffruticosa</i> Species of plant

Calendula suffruticosa is a species of herb in the family Asteraceae. It has a self-supporting growth form and broad leaves. Individuals can grow up to 40 cm (16 in).

<i>Dudleya cymosa <span style="font-style:normal;">subsp.</span> cymosa</i> Subspecies of succulent perennial plant

Dudleya cymosasubsp. cymosa is a species of succulent perennial plant in the family Crassulaceae native to California. It is the autonymous subspecies for Dudleya cymosa, and is known by the common name canyon liveforever. It is native to the California Coast Ranges, the Sierra Nevada and the Santa Monica Mountains. It is characterized by bright-yellow, orange or red flowers and broad, wide leaves. This plant is commonly found growing on rocky outcrops, talus slopes, and in shaded canyons.

Dudleya virens subsp. extima is a subspecies of succulent plant in the family Crassulaceae commonly known as the Guadalupe green liveforever. It is a rosette-forming leaf succulent, with both green and white waxy foliage. It has white flowers with spreading petals that bloom from May to June. It is a somewhat small plant, continuing a southward trend of decreasing size relative to other Dudleya virens subspecies. This plant is endemic to Guadalupe Island in the eastern Pacific Ocean, which is 241 kilometers off of the Baja California coast. It is very rare, with this plant only surviving on sheer cliff faces and canyons, out of the reach of the former feral goat population rampant on the island. It closely resembles a miniature version of Dudleya virens subsp. virens, but it may be more nearly related to the local Dudleya guadalupensis.

References

  1. 1 2 3 4 5 6 Mifsud, Stephen Martin; Stephenson, Ray; Thiede, Joachim (2015-09-23). "Sedum album subsp. rupi-melitense (Crassulaceae), a new vegetatively reproducing subspecies from Malta (Maltese Islands, Central Mediterranean)". Phytotaxa. 227 (2): 135. doi:10.11646/phytotaxa.227.2.3. ISSN   1179-3163.