Leptomeria drupacea

Last updated

Leptomeria drupacea
Leptomeria drupacea - Robert Wiltshire.jpg
Photo courtesy of Rob Wiltshire
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Santalales
Family: Santalaceae
Genus: Leptomeria
Species:
L. drupacea
Binomial name
Leptomeria drupacea
(Labill.) Druce
Leptomeria drupacea distribution map from living atlas of Australia.jpg
Map of Southern Australia, with blue circles indicating species occurrence. Sourced from Atlas of Living Australia
Synonyms [1]
  • Leptomeria billardierei R.Br.
  • Leptomeria billardierei var. humilis Hook.f.
  • Thesium drupaceum Labill.

Leptomeria drupacea, also known as the pale currant bush, is an endemic Australian hemi-parasitic erect shrub. It occurs commonly in dry woodlands across Tasmania Australia and in some parts of Victoria and Queensland. It has long yellowish-green slender branchlets that often give a broom-like appearance.

Contents

Description

Leptomeria drupacea flowers Photo courtesy of Rob Wiltshire Leptomeria drupaea flowers- Robert Wiltshire.jpg
Leptomeria drupacea flowersPhoto courtesy of Rob Wiltshire

Leptomeria drupacea is an upright green shrub that can grow up to 3m. Its flexible, almost cylindrical branchlets have longitudinal ridges, and its leaves and bracts are sessile and scale-like with a truncate base and a narrowly acute apex; 0.71mm long, 0.30mm wide. [2]

Its flowers are bisexual and are arranged into a raceme of around 10-16 flowers, which is typically inserted laterally to the branchlets. The pedicel of the flowers is obscure and hard to differentiate from the floral tube. The white to cream tepals (flushed reddish-pink upon ageing), 0.61mm long, are concave with an incurved and adaxially thickened apex that forms a hood with tiny hairs on the adaxial surface, restricted to small tufts. The floral disk is deeply lobed with a diameter of 0.60mm and the anthers, filaments and style are typically 0.10- 0.15mm long. [2] [3]

The smooth drupe, 3-6mm, are oval to almost round with a fleshy thick epicarp. The drupes start green, ripen reddish and are edible. Flowering occurs late spring to summer. [3]

Taxonomy

Leptomeria drupacea is part of the Santalaceae family which includes around 30 different genera and 400 species across the world in tropical and temperate regions. This family was first described in 1810 in Robert Brown’s Prodromus Flore Novae Holllandiae, which was based on specimens collected in 1802-1805 whilst on the Matthew Flinder’s circumcontinental voyage to Australia. [4] The Australian endemic genus Lemptomeria, from the Geek word ‘leptos’ meaning slender and ‘meros’ meaning part, referencing to the slender branches, consists of 17 different species in the southern parts of Australia. The species name Drupacea is derived from the Latin meaning 'like a drupe’. [3]

Typical woodland in Tasmania where Leptomeria drupacea is found Leptomeria drupacea Habitat.jpg
Typical woodland in Tasmania where Leptomeria drupacea is found
Leptomeria drupacea habit Leptomeria drupacea.jpg
Leptomeria drupacea habit

Distribution and habitat

Leptomeria drupacea is found in open eucalypt forests and woodlands, heath or heath-sedgelands, and sandy communities across eastern mainland Australia and Tasmania alongside eucalypts, wattles and banksias. [5] [2]

Ecology

Parasitism

The order Santalales is one of the largest groups of parasitic plants. These plants are functionally specialised to acquire essential nutrients through attaching to "host" plants via a modified root called a haustorium. [6]

Leptomeria drupacea is considered a hemiparasite. Unlike holoparasites, hemiparasites are not completely dependent on hosts because they can produce some of their own sugars via photosynthesis. Parasitism allows these plants to establish in environments where nutrient availability is poor. [6]

Other species

Out of the 17 Leptomeria species, there are only four species that have white flowers like L. drupacea; L. glomerata, L. pachyclada, L. pauciflora and L. preissiana.

Of these four species, only one crosses over in its distribution and shares a similar habit, L. glomerata. The best way to distinguish between the species is by their height and the number of flowers in an inflorescence. L. glomerata are typically no taller than 30cm and have 1-10 flowers in an inflorescence whereas L. drupacea can grow up to 3 metres and have typically more than 10 flowers in an inflorescence. [3]

Leptomeria drupacea is also often confused with L. acida due to the tepals flushing pink as they age. Therefore, best way to segregate from this species with reddish or green tepals is by counting 10-16 flowers in an inflorescence, and observing a prominently lobed floral disk. [2] [3]

Related Research Articles

<span class="mw-page-title-main">Santalales</span> Order of flowering plants

The Santalales are an order of flowering plants with a cosmopolitan distribution, but heavily concentrated in tropical and subtropical regions. It derives its name from its type genus Santalum (sandalwood). Mistletoe is the common name for a number of parasitic plants within the order.

<span class="mw-page-title-main">Mistletoe</span> Common name for various parasitic plants that grow on trees and shrubs

Mistletoe is the common name for obligate hemiparasitic plants in the order Santalales. They are attached to their host tree or shrub by a structure called the haustorium, through which they extract water and nutrients from the host plant.

<span class="mw-page-title-main">Loranthaceae</span> Family of mistletoes

Loranthaceae, commonly known as the showy mistletoes, is a family of flowering plants. It consists of about 75 genera and 1,000 species of woody plants, many of them hemiparasites. The three terrestrial species are Nuytsia floribunda, Atkinsonia ligustrina, and Gaiadendron punctatum Loranthaceae are primarily xylem parasites, but their haustoria may sometimes tap the phloem, while Tristerix aphyllus is almost holoparasitic. For a more complete description of the Australian Loranthaceae, see Flora of Australia online., for the Malesian Loranthaceae see Flora of Malesia.

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

The Santalaceae, sandalwoods, are a widely distributed family of flowering plants which, like other members of Santalales, are partially parasitic on other plants. Its flowers are bisexual or, by abortion, unisexual. Modern treatments of the Santalaceae include the family Viscaceae (mistletoes), previously considered distinct.

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

Schoepfia is a genus of small hemiparasitic trees, flowering plants belonging to the family Schoepfiaceae. The genus has long been placed in the Olacaceae family.

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

The Balanophoraceae are a subtropical to tropical family of obligate parasitic flowering plants, notable for their unusual development and formerly obscure affinities. In the broadest circumscription, the family consists of 16 genera. Alternatively, three genera may be split off into the segregate family Mystropetalaceae.

<i>Parentucellia viscosa</i> Species of flowering plant

Parentucellia viscosa is a species of flowering plant in the family Orobanchaceae known by the common names yellow bartsia and yellow glandweed. It is native to Europe, but it can be found on other continents, including Australia and North America, as an introduced species.

<i>Nepenthes andamana</i> Species of pitcher plant from Thailand

Nepenthes andamana is a tropical pitcher plant endemic to Phang Nga Province, Thailand, where it grows near sea level in coastal savannah and grassland. It is thought to be most closely related to N. suratensis.

<i>Osyris compressa</i> Species of flowering plant in the mistletoe family Santalaceae

Osyris compressa is a facultatively hemiparasitic, mainly South African plant of the sandalwood family, Santalaceae. Until recently, the favoured binomial name was Colpoon compressum, but around 2001, the genus Colpoon was included in Osyris on the basis of comparative DNA studies. That assignment is not final, however, and according to the Kew Gardens plant list, Colpoon compressum P.J.Bergius, though still in review, is the accepted name.

<i>Buddleja glomerata</i> Species of flowering plant

Buddleja glomerata is a shrub endemic to the mountains of the Karoo desert in South Africa, where it grows among boulders on dry hillsides. The species was first described and named by Heinrich Wendland in 1825. The shrub has a number of common names locally, the most popular being 'Karoo Sagewood'.

Dodecadenia is a botanical genus of flowering plants in the family Lauraceae. It contains a single species, Dodecadenia grandiflora. It is present from central Asia, to Himalayas and India. It is present in tropical and subtropical montane rainforest, laurel forest, in the weed-tree forests in valleys, mixed forests of coniferous and deciduous broad-leaved trees, Tsuga forests; 2,000–2,600 metres (6,600–8,500 ft) in China in provinces of Sichuan, Xizang, Yunnan, and countries of Bhutan, India, Myanmar, and Nepal.

<i>Anthobolus</i> Genus of flowering plant in the mistletoe family Santalaceae

Anthobolus is a genus of flowering shrubs in the sandalwood family, Santalaceae. The genus comprises 3 species, all endemic to Australia. They are dioecious, with male and female flowers on separate plants.

<i>Persoonia rufa</i> Species of flowering plant

Persoonia rufa is a species of flowering plant in the family Proteaceae and is endemic to the a restricted area of New South Wales. It is an erect to spreading shrub with hairy young branchlets, elliptic leaves, and yellow flowers borne in groups of up to twelve on a rachis up to 110 mm (4.3 in), each flower with a leaf at its base.

<i>Persoonia iogyna</i> Species of flowering plant

Persoonia iogyna is a species of flowering plant in the family Proteaceae and is endemic to south-eastern Queensland. It is an erect shrub or small tree with hairy young branchlets, narrow elliptical to lance-shaped leaves, yellow flowers and green fruit.

<i>Pimelea drupacea</i> Species of shrub

Pimelea drupacea, commonly known as cherry rice-flower, is a species of flowering plant in the family Thymelaeaceae and is endemic to south-eastern Australia. It is a shrub with elliptic leaves arranged in opposite pairs, and head-like clusters of white, tube-shaped flowers surrounded by two or four leaves.

<span class="mw-page-title-main">Pentapetalae</span> Group of eudicots known as core eudicots

In phylogenetic nomenclature, the Pentapetalae are a large group of eudicots that were informally referred to as the "core eudicots" in some papers on angiosperm phylogenetics. They comprise an extremely large and diverse group that accounting about 65% of the species richness of the angiosperms, with wide variability in habit, morphology, chemistry, geographic distribution, and other attributes. Classical systematics, based solely on morphological information, was not able to recognize this group. In fact, the circumscription of the Pentapetalae as a clade is based on strong evidence obtained from DNA molecular analysis data.

<span class="mw-page-title-main">Daniel Lee Nickrent</span>

Daniel Lee Nickrent is an American botanist, working in plant evolutionary biology, including the subdisciplines of genomics, phylogenetics, systematics, population genetics, and taxonomy. A major focus has been parasitic flowering plants, particularly of the sandalwood order (Santalales). His interest in photographic documentation and photographic databases has led to several photographic databases including Parasitic Plant Connection, Phytoimages, Plant Checklist for the Rocky Mountain National Park, and Plant Checklist for the Crab Orchard National Wildlife Refuge.

Romina Vidal-Russell is an Argentinean botanist who works in the areas of phytogeography, phylogeny, and parasitic plants, and on which she has written extensively. Her papers on the phylogeny of parasitic plants are cited on the APG website, and elsewhere and her collaborations are international. She currently works at the National University of Comahue in Argentina. She earned a Ph.D. at SIUC with Daniel L. Nickrent as supervisor.

<i>Stelis gracilis</i> Species of orchid

Stelis gracilis is a species of leach orchid, which is one of the largest genera in the orchid family, with over 600 species. Stelis gracilis are small epiphytes with greenish-white flowers in raceme inflorescences. This rare species of orchid is found in tropical rainforests in North and Central America. It was first described by the American botanist Oakes Ames in 1908.

Arjona megapotamica is a rare species of flowering plant in the family Schoepfiaceae, native to a small area of southeastern Brazil, where it grows in cool mountain grasslands. Like other Arjona species, it is thought to be a root hemiparasite. It is a small perennial plant growing as a bunch of short twigs from a woody central knob. As of December 2021, Arjona schumanniana was regarded by some sources as a synonym, by others as an independent species.

References

  1. "Leptomeria drupacea". Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 21 March 2022.
  2. 1 2 3 4 Lepschi, B. J. (1999). "Taxonomic revision of Leptomeria (Santalaceae)" . Australian Systematic Botany. 12 (1): 55–100. doi:10.1071/sb97004. ISSN   1446-5701.
  3. 1 2 3 4 5 George, A. S; Hewson, H. J (1984). "Santalaceae" (PDF). Flora of Australia. 22: 49–58.
  4. Der, J. P; Nickrent, D. L (2008). "A molecular phylogeny of Santalaceae (Santalales)" . Systematic Botany. 33: 107–116. doi:10.1600/036364408783887438. S2CID   85999681.
  5. Australia, Atlas of Living. "Species: Leptomeria drupacea". bie.ala.org.au. Retrieved 2022-03-20.
  6. 1 2 Nickrent, D. L (2011). "Santalales (Including Mistletoes)" (PDF). Encyclopedia of Life Sciences. John Wiley & Sons. doi:10.1002/9780470015902.a0003714.pub2. ISBN   9780470016176.