question: Are both Ceratophyllum and Eucomis a genus of flowering plants?
answer: yes
context: Title: Montsechia
  Passage: Montsechia is an extinct genus of aquatic plants containing the species Montsechia vidalii, discovered in Spain.  "Montsechia vidalii" lived about 130 million years ago, during the Barremian age, and appears to be the earliest known flowering plant.  It has affinities with the modern genus "Ceratophyllum".
  Title: Chloranthaceae
  Passage: Chloranthaceae is a family of flowering plants (angiosperms), the only family in the order Chloranthales.  It is not closely related to any other family of flowering plants, and is among the early-diverging lineages in the angiosperms.  They are woody or weakly woody plants occurring in Southeast Asia, the Pacific, Madagascar, Central and South America, and the West Indies.  The family consists of four extant genera, totalling about 77 known species according to Christenhusz and Byng in 2016.  Some species are used in traditional medicine.  The type genus is "Chloranthus".
  Title: Austrobaileyales
  Passage: Austrobaileyales is an order of flowering plants, consisting of about 100 species of woody plants growing as trees, shrubs and lianas.  Perhaps the most familiar species is "Illicium verum", from which comes the spice star anise.  The order belongs to the group of basal angiosperms, the ANA grade, which diverged earlier from the remaining flowering plants, and, as such, it is the extant group after the Amborellales and Nymphaeales, that is sister to all remaining extant angiosperms outside of the ANA grade.  The order includes just three families of flowering plants, the Austrobaileyaceae, a monotypic family containing the sole genus, "Austrobaileya scandens", a woody liana, the Schisandraceae, a family of trees, shrubs, or lianas containing essential oils, and the Trimeniaceae, essential oil-bearing trees and lianas.
  Title: Gnetophyta
  Passage: Gnetophyta is a division of plants, grouped within the gymnosperms (which also includes conifers, cycads, and ginkgos), that consists of some 70 species across the three relict genera: "Gnetum" (family Gnetaceae), "Welwitschia" (family Welwitschiaceae), and "Ephedra" (family Ephedraceae).  Fossilized pollen attributed to a close relative of "Ephedra" has been dated as far back as the Early Cretaceous.  Though diverse and dominant in the Tertiary, only three families, each containing a single genus, are still alive today.  The primary difference between gnetophytes and other gymnosperms is the presence of vessel elements, a system of conduits that transport water within the plant, similar to those found in flowering plants. Because of this, gnetophytes were once thought to be the closest gymnosperm relatives to flowering plants, but more recent molecular studies have largely disproven this hypothesis.
  Title: Eucomis
  Passage: Eucomis is a genus of flowering plants in the family Asparagaceae, subfamily Scilloideae, native to southern Africa.  Most species of this genus are commonly referred to as pineapple flowers or pineapple lilies.  They are bulbous perennials with basal rosettes of leaves with stout stems covered in star-shaped flowers with a tuft of green bracts at the top, superficially resembling a pineapple – hence the common names.
  Title: Zeltnera
  Passage: Zeltnera is a genus of flowering plants in the gentian family.  It was erected in 2004 when the genus "Centaurium" (the centauries) was split.  Genetic analysis revealed that "Centaurium" was polyphyletic, made up of plants that could be grouped into four clades. Each became a genus.  "Centaurium" remained, but it is now limited to the Eurasian species.  The Mexican species now belong to genus "Gyrandra", and the Mediterranean and Australian plants are in genus "Schenkia".  The new name "Zeltnera" was given to this genus, which contains most of the North American centauries.  There are about 25 species.
  Title: Ceratophyllum
  Passage: Ceratophyllum is a cosmopolitan genus of flowering plants including four accepted species in 2016, commonly found in ponds, marshes, and quiet streams in tropical and in temperate regions.  It is the only genus in the family Ceratophyllaceae, itself the only family in the order Ceratophyllales.  They are usually called coontails or hornworts, although hornwort is also used for unrelated plants of the division Anthocerotophyta.
  Title: Psychotria
  Passage: Psychotria is a genus of flowering plants in the Rubiaceae family.  It contains around 1,850 species and is therefore one of the largest genera of flowering plants.  The genus has a pantropical distribution and members of the genus are small understorey trees in tropical forests.  Some species are endangered or facing extinction due to deforestation, especially species of central Africa and the Pacific.
citations: Eucomis Ceratophyllum