Question: Are Castanopsis and Colvillea both a genus classification? 

Context articles: Pyrofomes castanopsidis
Colvillea racemosa
Lactarius acicularis
Castanopsis
Boletus albobrunnescens
Taxonomy of the Cactaceae
Lactarius longipilus
List of Utricularia species
Colvillea
Drosera hamiltonii

Pyrofomes castanopsidis is a species of polypore fungus in the family Polyporaceae.
 It was described as new to science in 2011 by Chinese mycologists Bao-Kai Cui and Yu-Cheng Dai.
 The type collections of the fungus were made in Luofushan Forest Park in Huizhou (Guangdong Province, China), where the fungus was discovered growing on a live plant of "Castanopsis".
 The specific epithet "castanopsidis" refers to the genus of the host plant.
Colvillea racemosa is a species of legume in the Fabaceae family.
 It is also known by the common name Colville's Glory.
 Its genus is named for Sir Charles Colville, an ex Governor of Mauritius.
 The tree is particularly known for its bright orange flowers that grow in large cone or cylinder shaped clusters.
 After flowering, the tree produces long, flat, woody seed pods.
 The tree has small deep green leaves, superficially similar to "Delonix regia".
Lactarius acicularis is a member of the large milk-cap genus "Lactarius" in the order Russulales.
 Described as new to science in 2010, the species is found in Chiang Mai Province of northern Thailand, where it grows in rainforests that are dominated by "Castanopsis armata", "Dipterocarpus" sp.
 and "Lithocarpus".
Castanopsis, commonly called chinquapin or chinkapin, is a genus of evergreen trees belonging to the beech family, Fagaceae.
 The genus contains about 120 species, which are today restricted to tropical and subtropical eastern Asia.
 A total of 58 species are native to China, with 30 endemic; the other species occur further south, through Indochina to Indonesia, and also in Japan.
 The English name chinkapin is shared with other related plants, including the golden chinkapins of the Pacific United States, which are sometimes included within "Castanopsis" but are more often considered a separate but very closely related genus, "Chrysolepis".
Boletus albobrunnescens is a species of bolete fungus in the family Boletaceae.
 It is classified in the section "Boletus" of the genus "Boletus", commonly known as the porcini mushrooms.
 First reported to science in 2010, the species was officially described in 2014.
 It is found in mixed evergreen and deciduous forests of Thailand, where it fruits singly to scattered in soil under "Pinus" and "Castanopsis" trees.
 Its fruit bodies have caps measuring 5.5 – in diameter.
 They are white but stain brown to reddish brown, hence the epithet, which combines the Latin words for "white" ("albo") and "becoming brown" ("brunnescens").
 The stipe measures 6 – long by 1.5 – thick except for the swollen base, which is up to 5 cm in diameter.
 The top of the stipe has a prominent network pattern (reticulations) that diminishes as it extends down to over half its length.
 Like the cap, it also stains brown after handling.
 The smooth spores are roughly spindle-shaped (fusoid), and measure 10.5–11.9 by 4.2–4.9 μm.
In 1984, the International Organization for Succulent Plant Study set up a working party, now called the International Cactaceae Systematics Group, to produce a consensus classification of the cactus family, down to the level of genus.
 Their classification has been used as the basis for systems published since the mid-1990s.
 Treatments in the 21st century have generally divided the family into around 125–130 genera and 1,400–1,500 species, which are then arranged in a number of tribes and subfamilies.
 However, subsequent molecular phylogenetic studies have shown that a very high proportion of the higher taxa (genera, tribes and subfamilies) are not monophyletic, i.e. they do not contain all of the descendants of a common ancestor.
 , the internal classification of the family Cactaceae remained uncertain and subject to change.
 A classification incorporating many of the insights from the molecular studies was produced by Nyffeler and Eggli in 2010.
Lactarius longipilus is a member of the large milk-cap genus "Lactarius" in the order Russulales.
 Found in Chiang Mai Province (northern Thailand), it was described as new to science in 2010.
 The mushrooms were found at an elevation of 1300 m growing in a forest dominated by "Castanopsis" spp., "Lithocarpus" sp., and "Pinus kesiya".
There are around 233 species in the genus "Utricularia", belonging to the Bladderwort family (Lentibulariaceae).
 It is the largest genus of carnivorous plants and has a worldwide distribution, being absent only from Antarctica and the oceanic islands.
 This genus was considered to have 250 species until Peter Taylor reduced the number to 214 in his exhaustive study, "The genus Utricularia - a taxonomic monograph", published by HMSO (1989).
 Taylor's classification is generally accepted, though his division of the genus in two subgenera was soon seen as obsolete.
 Molecular genetic studies have mostly confirmed Taylor's sections with some modifications (Jobson et al., 2003), but reinstalled the division of the genus in three subgenera.
 This list follows the subgeneric classification "sensu" Müller & Borsch (2005), updated with new information in Müller et al. (2006).
Colvillea is a genus of legume in the Fabaceae family.
 It is named for Sir Charles Colville, an ex Governor of Mauritius.
Drosera hamiltonii, the rosy sundew, is a small, compact species in the carnivorous plant genus "Drosera" and is the only species in the monotypic subgenus Stelogyne.
 The glandular leaves are about 2 cm long and arranged in a rosette.
 In November and December, pink flowers on 30 cm tall scapes bloom.
 It is endemic to coastal swamps in south-west Western Australia.
 It was first described by Cecil Rollo Payton Andrews in 1903 and placed in section "Stelogyne" as the only species by Ludwig Diels in 1906.
 In 1994, Rüdiger Seine and Wilhelm Barthlott suggested "D. hamiltonii" belonged in their section "Drosera", reducing section "Stelogyne" to synonymy with section "Drosera".
 In 1996, Jan Schlauer revised the genus classification and elevated section "Stelogyne" to a subgenus, arguing that the unique fused styles requires segregation at more than a sectional rank.