Angiosperms (Flowering Plants) • Earth.com

Erysimum nevadense

(Erysimum nevadense)

galery
en

Description

Erysimum nevadense is a perennial short-lived herb endemic to the Sierra Nevada of Spain, although there are some citations in the nearby Sierra de Gádor (Almería). This wallflower occurs between 1,700 and 2,700 m above sea level in subalpine scrublands and alpine meadows. It may be treated as a narrowly circumscribed single species, one of a group or complex of six separate species, or as a more broadly circumscribed species with six subspecies. Erysimum nevadense sensu stricto (synonym Erysimum nevadense subsp. nevadense) is a biennial or perennial plant, generally branched with multiple flowering stems, usually less than 25 cm (10 in) high. It is well supplied with hairs, most of which are boat-shaped (navicular), although some are three-rayed. Its leaves, which may appear greyish-green because of the hairs, are much narrower than long, usually 20–60 cm (8–24 in) long by 1–3 mm (0.0–0.1 in) wide. The flowering stems, excluding the raceme of flowers, are 2–15 cm (0.8–5.9 in) long. Individual flowers have yellow petals that are 12–16 mm (0.5–0.6 in) long and 3–4 mm (0.1–0.2 in) wide and a style 1.5–3 mm (0.06–0.12 in) long. The fruits are upright or drooping, usually less than 4 cm (1.6 in) long on pedicels up to 6 mm (0.2 in) long. Erysimum nevadense was first described by Georges François Reuter in 1855. In 1979, Adolf Polatschek described a number of new species of Erysimum.Six of these were considered to be closely related to E. nevadense, and in 1990, Peter William Ball explained the decision made in Flora Europaea to reduce the six to subspecies of E. nevadense. They were treated as separate species making up the nevadense group or complex in Flora Iberica in 1993. A molecular phylogenetic study published in 2014 included four of the species, E. gomez-campoi, E. mediohispanicum, E. nevadense and E. rondae. The study did not support the view that the four were closely related. In the combined mitochondrial and nuclear DNA analysis, E. mediohispanicum and E. nevadense fell into one clade, E. rondae into another, while E. gomez-campoi was sister to both clades. The authors concluded that the E. nevadense group did not have phylogenetic support.

Taxonomic tree:

Domain:
Kingdom: Plantae
Phylum:
Class: Magnoliopsida
Order:Brassicales
Family:Brassicaceae
Genus:Erysimum
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