Question: Are Croton and Chasmanthium in the same family?

Context articles: Croton oil
Croton gratissimus
Phorbol
Croton subaemulans
Croton (plant)
Croton glandulosus
Chasmanthium
Codiaeum variegatum
Croton insularis
Croton triacros

Croton oil ("Crotonis oleum") is an oil prepared from the seeds of "Croton tiglium", a tree belonging to the order Euphorbiales and family Euphorbiaceae, and native or cultivated in India and the Malay Archipelago.
 Small doses taken internally cause diarrhea.
 Externally, the oil can cause irritation and swelling.
 Croton oil is used in some chemical peels, due to its caustic exfoliating effects it has on the skin.
 Used in conjunction with phenol solutions, it results in an intense reaction which leads to initial skin sloughing.
 Since croton oil is very irritating and painful, it is used in laboratory animals to study how pain works, pain-relieving and anti-inflammatory drugs, and immunology.
Croton gratissimus (commonly known as lavender croton or lavender fever berry), is a tropical African shrub or small tree with corky bark, growing to 8 m and belonging to the family of Euphorbiaceae or spurges. Young twigs are slender and angular and covered in silver and rust-coloured scales.
Phorbol is a natural, plant-derived organic compound.
 It is a member of the tigliane family of diterpenes.
 Phorbol was first isolated in 1934 as the hydrolysis product of croton oil, which is derived from the seeds of the purging croton, "Croton tiglium".
 The structure of phorbol was determined in 1967.
Croton subaemulans is a species of plant of the genus "Croton" and the family Euphorbiaceae.
Croton is an extensive flowering plant genus in the spurge family, Euphorbiaceae.
 The plants of this genus were described and introduced to Europeans by Georg Eberhard Rumphius.
 The common names for this genus are rushfoil and croton, but the latter also refers to "Codiaeum variegatum".
 The generic name comes from the Greek κρότος ("krótos "), which means "tick" and refers to the shape of the seeds of certain species.
Croton glandulosus has many common names such as vente conmigo, tooth-leaved croton, tropic croton and sand croton.
 It is part of the Euphorbiaceae family which is also known as the Spurge Family and it contains about 321 genera and 7,950 species.
 The family derives its name from Euphorbus who was a Trojan War hero in Greek mythology, and was also the Greek Physician of King Juba of Numidia.
 The genus, Croton, is derived from Greek, meaning “tick,” and this is because the seeds of the plant resemble a tick.
 The species, glandulosus gets its name from the gland like structures that appear at the end of the leaf stalk.
 Vente conmigo and various others species are found to be common weeds in gardens and lawns.
Chasmanthium is a genus of North American plants in the grass family.
Codiaeum variegatum (garden croton or variegated croton; syn.
 "Croton variegatum" L.) is a species of plant in the genus "Codiaeum", which is a member of the family Euphorbiaceae.
 It is native to Indonesia, Malaysia, Australia, and the western Pacific Ocean islands, growing in open forests and scrub.
 It is an evergreen shrub growing to 3 m tall and has large, thick, leathery, shiny evergreen leaves, alternately arranged, 5–30 cm long and 0.5–8 cm broad.
 The inflorescences are long racemes 8–30 cm long, with male and female flowers on separate inflorescences; the male flowers are white with five small petals and 20–30 stamens, the female flowers yellowish, with no petals.
 The fruit is a capsule 9 mm diameter, containing three 6 mm seeds.
 The stems contain milky sap that bleeds from cut stems.
Croton insularis known as the silver croton is a small tree in the spurge family.
 Growing in dry rainforest and rainforest margins in eastern Australia, north from the Blue Mountains.
 It is also found in New Caledonia and Vanuatu.
 Other common names include White Croton, Cascarilla, Native Cascarilla and Queensland Cascarilla.
Croton triacros is a species of plants of the genus "Croton" and the family of Euphorbiaceae, found in north-east Queensland.