Boraginaceae, the borage or forget-me-notfamily, includes about 2,000 species of shrubs, trees, and herbs in 146 to 154 genera with a worldwide distribution.
Hydrophylloideae is a subfamily of the plant family Boraginaceae. Its taxonomic position is somewhat uncertain. Traditionally, and under the Cronquist system, the taxon was given family rank under the name Hydrophyllaceae, and treated as part of the order Solanales. More recent systems have recognised a close relationship to the borage family, Boraginaceae, initially by placing Hydrophyllaceae and Boraginaceae together in an order Boraginales, and in the 2016 APG IV system by including Hydrophyllaceae in Boraginaceae. However, the placement and circumscription of Boraginaceae is still uncertain. Some sources now split off Hydrophyllaceae again.
Boswellia is a genus of trees in the order Sapindales, known for its fragrant resin. The biblical incense frankincense is an extract from the resin of the tree Boswellia sacra, and is now produced also from B. frereana. Boswellia species are moderate-sized flowering plants, including both trees and shrubs.
Heliotropium is a genus of flowering plants traditionally included in the family Boraginaceae s.l., but placed in the family Heliotropiaceae within the Boraginales order, by the Boraginales Working Group.. There are around 325 species in this almost cosmopolitan genus, which are commonly known as heliotropes. They are highly toxic to dogs and cats, as well as to humans.
Boraginales is an order of flowering plants in the asterid clade, with a total of about 125 genera and 2,700 species. Different taxonomic treatments either include only a single family, the Boraginaceae, or divide it into up to eleven families. Its herbs, shrubs, trees and lianas (vines) have a worldwide distribution.
Commiphora is the most species-rich genus of flowering plants in the frankincense and myrrh family, Burseraceae. The genus contains approximately 190 species of shrubs and trees, which are distributed throughout the (sub-) tropical regions of Africa, the western Indian Ocean islands, the Arabian Peninsula, India, and South America. The genus is drought-tolerant and common throughout the xerophytic scrub, seasonally dry tropical forests, and woodlands of these regions.
Taverniera is a genus of legume in the family Fabaceae. It includes 17 species of shrubs or shrublets which range from Egypt eastwards to the Arabian Peninsula, Iraq, Iran, Pakistan, and India, and southwards to Ethiopia and Somalia. Typical habitats include seasonally-dry tropical and subtropical desert, shrubland, and bushland.
Bourreria is a genus of flowering plants in the borage family, Boraginaceae. Members of the genus are commonly known as strongbark or strongback. The generic name was chosen by Patrick Browne to honour German pharmacist Johann Ambrosius Beurer. The genus is native to the tropical Americas and to eastern Africa and Madagascar. American species are distributed from Mexico to northern South America, and in the Caribbean and Florida in the United States. The center of diversity is in the Caribbean, Central America, and Mexico. The eastern African species range from Ethiopia to Mozambique and to Madagascar, the Comoro Islands, and Mauritius.
Gymnocarpos bracteatus is a species of plant in the family Caryophyllaceae. It is endemic to the Hajhir Mountains of Socotra in Yemen. Its natural habitat is subtropical or tropical dry shrubland.
Gymnocarpos is a genus of plants in the family Caryophyllaceae.
Hoplestigma is a genus of flowering plants in the family Boraginaceae, although this is disputed, and it has been placed in its own family Hoplestigmataceae. Its two species are native to Cameroon, Gabon, Ivory Coast and Liberia in western tropical Africa.
Xylocalyx is a genus of plants in the family Orobanchaceae.
Boraginoideae is a subfamily of the plant family Boraginaceae s.s, with about 42 genera. That family is defined in a much broader sense in the Angiosperm Phylogeny Group (APG) system of classification for flowering plants. The APG has not specified any subfamilial structure within Boraginaceae s.l.
Cryptolepis is a plant genus in the family Apocynaceae. It includes some 42 species.
Plocama is a genus of flowering plants in the family Rubiaceae. It was described by William Aiton in 1789. It is distributed from the Canary Islands to northwestern India.
Heliotropiaceae are a cosmopolitan family of flowering plants with approximately 450 species worldwide, though it is concentrated especially in the tropics and subtropics.
Coldenia, named after C. Colden, is a monotypic genus of flowering plants traditionally included in the borage family, Boraginaceae sensu lato. It was assigned to the subfamily Ehretioideae, but molecular data revealed it to be more closely related to the genus Cordia, so that other authors placed in Cordioideae. Subsequently, it was placed in its own family, Coldeniaceae, within the Boraginales order, by the Boraginales Working Group.
Euploca is an almost cosmopolitan genus of plants with 168 species. It was first described by Thomas Nuttall in 1837. While part of the broadly defined Boraginaceae in the APG IV system from 2016, a revision of the order Boraginales from the same year includes Euploca in the separate family Heliotropiaceae. Its species used to be classified in the genera Hilgeria and Schleidenia and in Heliotropium sect. Orthostachys, but were found to form an independent lineage in a molecular phylogenetic analysis, more closely related to Myriopus than to Heliotropium. While many species use the C4 photosynthetic pathway, there are also C3–C4 intermediate species. Species have leaves with a C4-typical Kranz anatomy.
Chorisochora is a genus of flowering plants belonging to the family Acanthaceae.
