Webb's Adderhead

from Wikipedia, the free encyclopedia
Webb's Adderhead
Echium webbii - La Palma - 01.JPG

Webb's adder head ( Echium webbii )

Systematics
Nuclear eudicotyledons
Asterids
Euasterids I
Family : Boraginaceae (Boraginaceae)
Genre : Adderheads ( Echium )
Type : Webb's Adderhead
Scientific name
Echium webbii
Coincy

Webb's adder head ( Echium webbii ) is a species of the genus of the adder heads ( Echium ) within the predatory family (Boraginaceae). This endemic occurs only on the Canary Island of La Palma .

description

Detail of an inflorescence with flowers

Vegetative characteristics

Webb's adder head is a shrub and reaches heights of 1 to 1.5 meters. The sitting leaves are 8 to 10, rarely up to 12 centimeters in length, lanceolate and densely covered with silky, shiny hairs ( trichomes ).

Generative characteristics

The flowering period extends from March to April. The terminal, upright, slender, inflorescences are 10 to 20 centimeters long wraps with bracts.

The mostly stalked flowers are five-fold with a double flower envelope and, in contrast to the flowers of most other Boraginaceae, weakly zygomorphic . The calyx is about 3 millimeters long, with linear blunt calyx lobes. The intense blue corolla is 9 to 10 millimeters long.

The fruits are showy, thorny nuts.

Occurrence

Webb's adder head is endemic to the island of La Palma. It colonizes rocky subsoil in the area of ​​forests.

Taxonomy

The first description of Echium webbii was made in 1903 by Auguste Henri Cornut de Coincy in Bulletin de l'Herbier Boissier , sér. 2 3, p. 270. The specific epithet webbii honors the English botanist Philip Barker Webb (1793–1854).

literature

Individual evidence

  1. a b data sheet from Flora de Canarias .
  2. ^ Echium webbii at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed November 18, 2015.

Web links

Commons : Webb's Natternkopf ( Echium webbii )  - album with pictures, videos and audio files