Ceratophyllaceae is a cosmopolitan family of flowering plants including one living genus commonly found in ponds, marshes, and quiet streams in tropical and in temperate regions. It is the only extant family in the order Ceratophyllales. Species are commonly called coontails or hornworts, although hornwort is also used for unrelated plants of the division Anthocerotophyta.
Nyssaceae is a family of flowering trees sometimes included in the dogwood family (Cornaceae). Nyssaceae is composed of 37 known species in the following five genera:
Nartheciaceae is a family of flowering plants. The APG III system places it in the order Dioscoreales, in the clade monocots. As circumscribed by APG IV (2016) it includes 35 species of herbaceous plants in the following five genera:
The Strelitziaceae comprise a family of monocotyledonous flowering plants, very similar in appearance and growth habit to members of the related families Heliconiaceae and Musaceae. The three genera with seven species of Strelitziaceae have been included in Musaceae in some classifications, but are generally recognized as a separate family in more recent treatments such as the APG II system (2003). The APG II system assigns the Strelitziaceae to the order Zingiberales in the commelinid clade.
The family Pandaceae consists of three genera that were formerly recognized in the Euphorbiaceae. Those are:
Dichapetalaceae is a family of flowering plants, consisting of 3 genera and about 170 species. Members of this family are trees, shrubs or lianas found in tropical and subtropical regions of the world.
Erythroxylaceae is a family of flowering trees and shrubs consisting of 4 genera and 271 species. The four genera are AneulophusBenth., ErythroxylumP.Browne, NectaropetalumEngl., and PinacopodiumExell & Mendonça. The best-known species are the coca plants, including the species Erythroxylum coca, the source of the drug cocaine.
Irvingiaceae is a family of flowering plants, consisting of 13 species in the 3 genera Allantospermum, Irvingia and Klainedoxa. Desbordesia, formerly accepted is now included in Irvingia.
Resedaceae is a family of mostly herbaceous dicotyledonous plants comprising 107 known species in 8 to 12 genera:
Staphyleaceae is a small family of flowering plants in the order Crossosomatales, native to Europe, temperate and tropical Asia and the Americas. The largest genus Staphylea, which gives the family its name, contains the "bladdernut" trees. The family includes three genera with more than 40 known species.
Boryaceae is a family of highly drought-tolerant flowering plants native to Australia, placed in the order Asparagales of the monocots. The family includes two genera, with twelve species in total in Australia.
Tecophilaeaceae is a family of flowering plants, placed in the order Asparagales of the monocots. It consists of nine genera with a total of 27 species.
Metteniusa cundinamarcensis is a species of flowering plants in the family Metteniusaceae. It was formerly placed in the family Cardiopteridaceae. It is endemic to Colombia.
The Neuradaceae are a family of flowering plant, comprising three genera — Grielum, Neurada and Neuradopsis — totalling ten known species.
Kirkiaceae is a family of flowering plants in the order Sapindales. It comprises one genera, Kirkia, totalling six species. These two genera were previously placed in family Simaroubaceae, but were transferred into their own family because they produce neither quassinoids nor limonoids. Kirkia is named for Captain John Kirk (explorer) of the famous Zambesi Expedition.
Huaceae is a family of plant in the rosids group, which has been classed in the orders Malpighiales, Malvales, and Violales or in its own order Huales. The APG II system placed it in the clade eurosids I, whereas the APG III system of 2009 and APG IV (2016) place it within the Oxalidales. The family is endemic to central Africa. It contains four species in the following two genera:
Calophyllaceae is a family of flowering plants in the order Malpighiales and is recognized by the APG III system of classification. Most of the 14 genera and 475 species included in this family were previously recognized in the tribe Calophylleae of the family Clusiaceae. The Angiosperm Phylogeny Group determined that splitting this clade of genera off into their own family was necessary.
Centroplacaceae is a family of flowering plants in the order Malpighiales and is recognized by the APG III system of classification. The family comprises two genera: Bhesa, which was formerly recognized in the Celastraceae, and Centroplacus, which was formerly recognized in the Euphorbiaceae, together comprising six species. The Angiosperm Phylogeny Group determined that based on previous phylogenetic analysis, these two genera formed an isolated clade and recognition of the family was "reasonable."
Talinaceae is a family of two genera and 28 species of flowering plants comprising shrubs, lianas, and herbaceous species native to the Americas, Africa and Madagascar. The family is newly recognized through research by the Angiosperm Phylogeny Group III system to deal with long-standing phylogenetic difficulties in placing various genera within the Caryophyllales.
Petiveriaceae is a family of flowering plants formerly included as subfamily Rivinoideae in Phytolaccaceae. The family comprises nine genera, with about 20 known species.
