Question: Are Libocedrus and Helianthus both types of plants?

Context articles: Sunflower (disambiguation)
Sunflower seed
Helianthus californicus
Helianthus eggertii
Helianthus
Libocedrus
Helianthus schweinitzii
Helianthus anomalus
List of Lepidoptera that feed on Helianthus
Alvordia

Sunflower ("Helianthus") is a genus of annual flowering plants native to North America.
The sunflower seed is the fruit of the sunflower ("Helianthus annuus").
 There are three types of commonly used sunflower seeds: linoleic (most common), high oleic, and NuSun developed for sunflower oil.
 Each variety has its own unique levels of monounsaturated, saturated, and polyunsaturated fats.
 The information in this article refers mainly to the linoleic variety.
Helianthus californicus is a North American species of sunflower known by the common name California sunflower.
 It is native to California in the United States and Baja California in Mexico, where it grows in many types of habitats.
Helianthus eggertii, known as Eggert's sunflower, is a North American species of flowering plants in the sunflower family.
 It is native to Tennessee, Kentucky, South Carolina, and Alabama.
 It is best known as one of the few plants to have been delisted under the Endangered Species Act because of the species' recovery.
 It was described by John Kunkel Small in 1903.
Helianthus or sunflower (from the Greek: ήλιος , "Hēlios", "sun" and ανθός , "anthos", "flower") L. is a genus of plants comprising about 70 species in the family Asteraceae.
 The genus is one of many in the Asteraceae that are known as sunflowers.
 Except for three species in South America, all "Helianthus" species are native to North America.
 The common name, "sunflower", typically refers to the popular annual species "Helianthus annuus", or the common sunflower, whose round flower heads in combination with the ligules look like the sun.
 This and other species, notably Jerusalem artichoke ("H. tuberosus"), are cultivated in temperate regions and some tropical regions as food crops for humans, cattle, poultry and ornamental plants.
 The largest sunflower field is located in Tuscany, Italy.
Libocedrus is a genus of five species of coniferous trees in the cypress family Cupressaceae, native to New Zealand and New Caledonia.
 The genus is closely related to the South American genera "Pilgerodendron" and "Austrocedrus", and the New Guinean genus "Papuacedrus", both of which are included within "Libocedrus" by some botanists.
 These genera are rather similar to the Northern Hemisphere genera "Calocedrus" and "Thuja": in earlier days, what is now "Calocedrus" was sometimes included in "Libocedrus".
 They are much less closely related, as recently confirmed (Gadek et al. 2000).
 The generic name means "teardrop cedar", apparently referring to drops of resin.
Helianthus schweinitzii, known by the common name Schweinitz's sunflower, is a perennial wildflower endemic to the Piedmont physiographic province of North Carolina and South Carolina.
 It is classified in the Sunflower Family (Asteraceae).
 Nationwide it is one of the rarest species of sunflower in the United States, but within its range it is not uncommon along utility and highway rights-of-way in North Carolina and South Carolina.
 There are only about 90 known populations, many containing less than 40 plants each.
 It was listed as a federal endangered species on May 7, 1991.
Helianthus anomalus (Western sunflower) is a species of plants in the sunflower family, found in the southwestern United States.
"Helianthus" species are used as food plants by the larvae of a number of Lepidoptera species including:
Alvordia is a genus of flowering plants in the family Asteraceae.
 It includes 4 species of shrubs which occur in the states of Baja California and Sonora, Mexico.
 The genus is characterized by having a secondary clustering of heads into compound units, so that what appears to be a single head is actually a group of heads packed together.
 The genus is classified as a member of subtribe Helianthinae, the same subtribe that contains the common sunflower ("Helianthus").
 Based on the reported chromosome counts, "Alvordia" includes both diploid and polyploid species, but the relationships among these have not yet been studied in detail.
 No chromosome count has yet been reported for the species "A. congesta" from Sonora, which was a later transfer to the genus.