Angiosperms (Flowering Plants) • Earth.com

One-sided bottlebrush

(Melaleuca quadrifida quadrifida)

galery
en

Description

Calothamnus quadrifidus, commonly known as one-sided bottlebrush, is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. The common name alludes to the arrangement of the flowers in the inflorescence which line up on one side of the stem. It is a shrub with grey-green, pine-like foliage covered with soft hairs and red, four-part flowers in spring. Widely cultivated because of its attractive foliage, colourful, unusual and prolific flowers, it grows in a variety of habitats and soils. In 2010, Alex George published a review of the species based on recent research and described a number of new subspecies. In 2014 Craven, Edwards and Cowley proposed that the species be renamed Melaleuca quadrifida. Calothamnus quadrifidus is a shrub which sometimes grows to a height of 5 metres (20 ft) although usually much less and it sometimes has a lignotuber. Its leaves are variable, depending on subspecies, but usually 10–50 millimetres (0.4–2 in) long and 0.8–10 millimetres (0.03–0.4 in) wide, sometimes circular in cross section but in some subspecies flat. The flowers are usually red, although there are white and yellow forms, with the red flowered form most commonly seen in cultivation. The flowers are arranged in clusters, usually on one side of the stem amongst the older leaves. There are four petals, each 3.5–4 millimetres (0.1–0.2 in) long which fall off soon after the flower opens. The stamens are arranged in 4 claw-like bundles, all about the same length. In most subspecies, flowering occurs in spring. Flowering is followed by fruits which are woody, barrel-shaped capsules, 6–14 millimetres (0.24–0.55 in) long. Calothamnus quadrifidus was first formally described in 1812 by Robert Brown from a specimen he collected at Lucky Bay near Esperance during the Investigator expedition with Matthew Flinders. The description was published in Curtis's Botanical Magazine (edited by John Sims). Calothamnus quadrifidus is common and widespread in the Eremaean and South-West botanical provinces, occurring in a wide range of habitats and growing in a range of soils. Research on the competition between honeybees (Apis mellifera) and honeyeaters (especially the Brown honeyeater and White-cheeked honeyeater) for the nectar of Calothamnus quadrifidus has shown that honeyeaters consume more nectar early in the day.

Taxonomic tree:

Domain:
Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Order:Myrtales
Family:Myrtaceae
Genus:Melaleuca
News coming your way
The biggest news about our planet delivered to you each day