Loranthaceae | |
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Ligaria cuneifolia | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Order: | Santalales |
Family: | Loranthaceae Juss. [1] |
Genera | |
See text | |
Distribution of the Loranthaceae. |
Loranthaceae, commonly known as the showy mistletoes, is a family of flowering plants. [2] [3] It consists of about 75 genera and 1,000 species of woody plants, many of them hemiparasites. The three terrestrial species are Nuytsia floribunda (the Western Australian Christmas tree), Atkinsonia ligustrina (from the Blue Mountains of Australia), and Gaiadendron punctatum (from Central/South America.) Loranthaceae are primarily xylem parasites, but their haustoria may sometimes tap the phloem, [4] while Tristerix aphyllus is almost holoparasitic. [5] For a more complete description of the Australian Loranthaceae, see Flora of Australia online., [2] for the Malesian Loranthaceae see Flora of Malesia.
Originally, Loranthaceae contained all mistletoe species, but the mistletoes of Europe and North America ( Viscum , Arceuthobium , and Phoradendron ) belong to the family Santalaceae. The APG II system 2003 assigns the family to the order Santalales in the clade core eudicots.
Molecular phylogenetics suggests the following relationships of tribes, subtribes and genera: [6] [7] [8] [9] Nuytsia is sister to the rest the Loranthaceae, [10] with many characters, including its pollen, its fruit (dry and three winged), and the number of its cotyledons, differing substantially from all other Loranthaceae genera. [5] The root parasitic habit is thought to be the basal condition of the family., [5] with the stem/branch parasitic habit evolving ca. 28-40 million years ago. [5] [11] However, Grimsson et al. (2017) [12] estimate this as occurring somewhat earlier (ca. 40-52 million years ago).
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.
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.
Viscaceae is a taxonomic family name of flowering plants. In this circumscription, the family includes the several genera of mistletoes. This family name is currently being studied and under review as in past decades, several systems of plant taxonomy recognized this family, notably the 1981 Cronquist system.
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.
The eudicots, Eudicotidae, or eudicotyledons are a clade of flowering plants mainly characterized by having two seed leaves upon germination. The term derives from Dicotyledons.
The Rafflesiaceae are a family of rare parasitic plants comprising 36 species in 3 genera found in the tropical forests of east and southeast Asia, including Rafflesia arnoldii, which has the largest flowers of all plants. The plants are endoparasites of vines in the genus Tetrastigma (Vitaceae) and lack stems, leaves, roots, and any photosynthetic tissue. They rely entirely on their host plants for both water and nutrients, and only then emerge as flowers from the roots or lower stems of the host plants.
Olacaceae is a family of flowering plants in the order Santalales. They are woody plants, native throughout the tropical regions of the world. As of July 2021, the circumscription of the family varies; some sources maintain a broad family, others split it into seven segregate families.
Schoepfiaceae is a family of flowering plants recognized in the APG III system of 2009. The family was previously only recognized by few taxonomists; the plants in question usually being assigned to family Olacaceae and Santalaceae.
Misodendrum is a genus of hemiparasites which grow as mistletoes on various species of Nothofagus. Its species are all restricted to South America. The name of the genus is incorrectly spelt in a number of ways, including Misodendron and Myzodendron.
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.
Haloragaceae is a eudicot flowering plant family in the order Saxifragales, based on the phylogenetic APG system. In the Cronquist system, it was included in the order Haloragales.
Ochanostachys is a genus of flowering plants with a single species, Ochanostachys amentacea. The genus is placed in the family Olacaceae in the APG IV system and by sources that use it. It may alternatively be placed in the family Coulaceae, if the split of Olacaceae into seven separate families is accepted. Ochanostachys amentacea is native to the Andaman Islands, Borneo, Peninsular Malaysia, the Nicobar Islands, Sumatra and Thailand.
The Aptandraceae is a family of flowering plants in the sandalwood order Santalales that is recognized by some sources; others sink the family in Olacaceae. The members of the tropical plant family are parasitic on other plants, usually on the roots, and grow as trees, shrubs or woody lianas.
Atkinsonia is a hemi-parasitic shrub with oppositely set, entire leaves and yellowish, later rusty-red colored flowers, that is found in Eastern Australia. It is a monotypic genus, the only species being Atkinsonia ligustrina, and is assigned to the showy mistletoe family, Loranthaceae. It is sometimes called Louisa's mistletoe.
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.
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.
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.
Russell Lindsay Barrett is an Australian botanist.
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.