Hieracium radyrense
Encyclopedia
Radyr Hawkweed is the common name of Hieracium radyrense, a very rare endemic species restricted to Radyr
in south Wales
, UK. First identified in 1907 it was described as a variety in 1948 and a species in 1955.. and belongs to Hieracium
section Vulgata. It has rarely been seen and surveys between 1998 and 2004 indicate that only one population of around twenty five plants survive.
A polycarpic
perennial, Radyr Hawkweed flowers from late May to early June or July. Specimens found at Danybryn in Radyr
grew on a grassy bank and lawn under the partial shade of trees and shrubs.
hairs on the involucral bracts. With two or three acuminate stem leaves irregularly and sharply toothed, these are laciniate dentate towards the base. The ligule
s are hairy at the apex.
Radyr
Radyr is an outer suburb of Cardiff, the capital of Wales. The suburb is situated in the west of the city, although it was originally a separate village, and is located around 5 miles north west of Cardiff city centre. According to 2009 estimates, the suburb has a population of 6,000...
in south Wales
Wales
Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...
, UK. First identified in 1907 it was described as a variety in 1948 and a species in 1955.. and belongs to Hieracium
Hieracium
Hieracium known by its common name Hawkweed and long ago by its classical name hierakion which comes from the ancient Greek hierax, "a hawk"...
section Vulgata. It has rarely been seen and surveys between 1998 and 2004 indicate that only one population of around twenty five plants survive.
A polycarpic
Polycarpic
Polycarpic plants are those that flower and set seeds many times before dying....
perennial, Radyr Hawkweed flowers from late May to early June or July. Specimens found at Danybryn in Radyr
Radyr
Radyr is an outer suburb of Cardiff, the capital of Wales. The suburb is situated in the west of the city, although it was originally a separate village, and is located around 5 miles north west of Cardiff city centre. According to 2009 estimates, the suburb has a population of 6,000...
grew on a grassy bank and lawn under the partial shade of trees and shrubs.
Identification
The main features are broadly ovate-lanceolate, acute basal rosette leaves, with diagnostic marked teeth on the rosette leaves and dense stellateTrichome
Trichomes are fine outgrowths or appendages on plants and certain protists. These are of diverse structure and function. Examples are hairs, glandular hairs, scales, and papillae.- Algal trichomes :...
hairs on the involucral bracts. With two or three acuminate stem leaves irregularly and sharply toothed, these are laciniate dentate towards the base. The ligule
Ligule
A ligule — is a thin outgrowth at the junction of leaf and leafstalk of many grasses and sedges or a strap-shaped corolla, such as that of a ray floret in plants in the daisy family....
s are hairy at the apex.