Eucnide

Eucnide
	Eucnide urens
Systematics
	Nuclear eudicotyledons
	Asterids
Order :	Dogwood-like (Cornales)
Family :	Nettle family (Loasaceae)
Subfamily :	Mentzelioideae
Genre :	Eucnide
Scientific name
	Eucnide
	Zucc.

Eucnide is a genus of plants inthe nettle family (Loasaceae). The approximately 14 species are distributed from the USA via Mexico to Guatemala.

description

Flower of Eucnide urens

Vegetative characteristics

Eucnide species are annual or perennial herbaceous plants . The above-ground parts of the plant are covered with nettle hair.

The mostly alternate leaves are divided into a petiole and a leaf blade. The leaf blades are broadly ovate to almost circular, slightly lobed at the edge and deeply serrate to pointed.

Generative characteristics

The inflorescences are a simple dichasium or terminal and thyrsenic-like , occasionally with a long, final monochasium . In front of each individual flower there are two bractose or frondose prophylls .

The hermaphroditic flowers are radial symmetry and five-fold with a double flower envelope . The five free, green sepals are lanceolate, ribbon-shaped or narrow-egg-shaped, and shorter than the petals. The five yellow-white, yellow or orange-colored petals, which are fused up to half their length, are narrow-egg-shaped to egg-shaped. The 15 to over 150 stamens are above the petals and are of the same shape and size. The stamens are not grown up to the roots, staminodes are missing. The ovary is subordinate. The scar is three to five times lobed.

The fruit stalk is sometimes greatly elongated during the ripening period. The stalked capsule fruits are cylindrical to conical. The capsule fruit opens by means of three to five flaps at the top of the fruit. The seeds are egg-shaped.

The number of chromosomes is 2n = 42.

Systematics and distribution

Eucnide bartonioides

Eucnide cordata

Eucnide urens

The genus Eucnide was published in 1844 by Joseph Gerhard Zuccarini in Index Seminum (Munich). set up. A synonym for Eucnide Zucc. is Sympetaleia A. Gray .

The genus Eucnide belongs to the subfamily Mentzelioideae within the family Loasaceae .

The genus Eucnide is distributed from the southwest and south-central USA to Guatemala. Its center of diversity is in Mexico.

The genus Eucnide includes around 14 species:

Eucnide aurea (A. Gray) HJThomps. & WRErnst : This endemic occurs only in Baja California, Mexico,and neighboring islands.
Eucnide bartonioides Zucc. : It occurs in two varieties in Texas and northern Mexico.
Eucnide chiapasana B.L.Turner : You only comes in the Mexican states of Oaxaca and Chiapas before.
Eucnide cordata Kellogg ex Curran : It occurs in Mexico.
Eucnide durangensis H.J. Thomps. & AMPowell : It only occurs in the Mexican states of Durango and Coahuila .
Eucnide floribunda S. Watson
Eucnide grandiflora (Groenl.) Rose : It occurs in southern Mexico and Guatemala.
Eucnide hirta (G.Don) HJThomps. & WRErnst
Eucnide hypomalaca Standl. : It occurs only in the Mexican states of Sonora and Chihuahua .
Eucnide lobata A.Gray : It occurs in Texas and Mexico.
Eucnide rupestris (Baill.) HJThomps. & WRErnst : It occurs in the US states of Arizona and California and in the Mexican states of Baja California, Sinaloa and Sonora.
Eucnide tenella (IMJohnst.) HJThomps. & WRErnst
Eucnide urens Parry : It occurs in the US states of Arizona, Utah , Nevada , California and northern Mexico.
Eucnide xylinea C.H. Mull . : It occurs only in the Mexican states of Coahuila and Nuevo León .

proof

Maximilian Weigend: Loasaceae. In: Klaus Kubitzki (Ed.): The Families and Genera of Vascular Plants . Volume 6: Flowering Plants, Dicotyledons: Celastrales, Oxalidales, Rosales, Cornales, Ericales . Springer, Berlin / Heidelberg / New York 2004, ISBN 3-540-06512-1 , pp. 248 (English, limited preview in Google Book search).
Maximilian Weigend: Familial and generic classification. online , accessed August 1, 2008

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Larry Hufford: Eucnide Zuccarini - the same text online as the printed work , In: Flora of North America Editorial Committee (Hrsg.): Flora of North America North of Mexico , Volume 12 - Magnoliophyta: Vitaceae to Garryaceae , Oxford University Press, New York and Oxford, December 22, 2016., ISBN 978-0-19-064372-0 .
↑ ^a ^b ^c Eucnide in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved September 23, 2017.

Web links

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

[FoNA-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ Larry Hufford: Eucnide Zuccarini - the same text online as the printed work , In: Flora of North America Editorial Committee (Hrsg.): Flora of North America North of Mexico , Volume 12 - Magnoliophyta: Vitaceae to Garryaceae , Oxford University Press, New York and Oxford, December 22, 2016., ISBN 978-0-19-064372-0 .

[GRIN-2] Eucnide in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved September 23, 2017.