Thevetia

Thevetia
	Bell tree ( Thevetia peruviana ) (orange variety )
Systematics
	Euasterids I
Order :	Enzianartige (Gentianales)
Family :	Dog poison family (Apocynaceae)
Subfamily :	Rauvolfioideae
Tribe :	Plumerieae
Genre :	Thevetia
Scientific name
	Thevetia
	L.

The Thevetia are a genus of plants from the family of the dog poison plants (Apocynaceae). All species come from tropical America.

description

Thevetia are shrubs , small trees or, rarely, lianas . The plants contain milky sap . The leaves are arranged in a spiral, not glandular, sessile or stalked. Most often glands can be found between the petioles .

The zymous inflorescences are terminal, a peduncle and pedicels are pronounced. The large, showy flowers are hermaphroditic. The calyx is deeply five-lobed, on the inside there are a multitude of scales at the base. The yellow crown is saucer-shaped, the corolla-tube cylindrical with a sudden bell-shaped opening. There are five hairy scales in the crown throat. The corolla lobes are more or less upright, folded to the left. The five stamens do not protrude beyond the crown. The anthers are free from each other and are not fused with the scar . The synkarpe ovary is upper constant and consists of two distinct carpels with two to four ovules . The nectarium is ring-shaped and fleshy. The flower has a stylus with an umbrella-shaped bottom and top two-lobed stigma.

Fruits of Thevetia peruviana - seeds with shell, opened fruit, seeds, completely black and dried fruit (clockwise)

The fruit is drupe - or berry-like and contains two to four seeds .

distribution

The three to seven species are native to the tropical parts of Central and South America and the Caribbean.

species

Here is a selection:

Thevetia ahouai (L.) A.DC. : It occurs from Mexico to Venezuela and in Cuba.
Thevetia amazonica Ducke : It occurs from Bolivia to Brazil.
Thevetia bicornuta Garbage. Arg . : It occurs from Bolivia to Brazil and northeast Argentina.

According to R. Govaerts, the following species are no longer included in this genus:

Schellenbaum ( Thevetia peruviana (Pers.) K.Schum. ) => Cascabela thevetia (L.) Lippold
Thevetia thevetioides (Kunth) K.Schum. => Cascabela thevetioides (Kunth) Lippold

literature

Henri Alain Liogier: Descriptive Flora of Puerto Rico and Adjancent Islands, Spermatophyta , Volume IV: Melastomataceae to Lentibulariaceae . Universidad de Puerto Rico, 1995, ISBN 0-8477-2337-2 .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Rafaël Govaerts (Ed.): Thevetia - World Checklist of Selected Plant Families des Royal Botanic Gardens, Kew. Last accessed on November 11, 2017.

Web links

Commons : Thevetia - collection of images, videos and audio files

[WCSP-1] ↑ ^a ^b ^c ^d ^e ^f Rafaël Govaerts (Ed.): Thevetia - World Checklist of Selected Plant Families des Royal Botanic Gardens, Kew. Last accessed on November 11, 2017.