Swan River myrtle | |
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Hypocalymma robustum in John Forrest National Park | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Myrtales |
Family: | Myrtaceae |
Genus: | Hypocalymma |
Species: | H. robustum |
Binomial name | |
Hypocalymma robustum | |
Synonyms [1] | |
Leptospermum robustumEndl. |
Hypocalymma robustum, commonly known as Swan River myrtle, [2] is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south-west of Western Australia. It is an erect, multistemmed shrub or shrublet with linear to narrowly oblong leaves and pink flowers arranged in pairs in leaf axils, with 35 to 60 stamens.
Hypocalymma robustum is an erect, glabrous shrub or shrublet that typically grows up to 0.3–1.5 m (1 ft 0 in – 4 ft 11 in) high, and has many stems. Its leaves are arranged in opposite pairs, linear to narrowly oblong, 14–25 mm (0.55–0.98 in) long, 1.2–2.5 mm (0.047–0.098 in) wide and flat, covered with small glands. The flowers are borne in pairs in leaf axils and are sessile or on a peduncle up to 3 mm (0.12 in) long. The bracts are small, broadly lance-shaped and the bracteoles are broadly elliptic, 2–3 mm (0.079–0.118 in) long. The sepal lobes are egg-shaped almost round, 2–3 mm (0.079–0.118 in) long and pale pink with glands in the centre. The petals are pink, 4.0–5.5 mm (0.16–0.22 in) long and there are 35 to 70 stamens in several rows, the longest filaments 4.5–6.5 mm (0.18–0.26 in) long and joined at the base. Flowering occurs from June to November and the and the fruit is 3–4 mm (0.12–0.16 in) long, about 4.5 mm (0.18 in) wide and 3 mm (0.12 in) thick. [2] [3] [4]
This species was first formally described in 1837 by Stephan Endlicher in Enumeratio plantarum quas in Novae Hollandiae ora austro-occidentali ad fluvium Cygnorum et in sinu Regis Georgii collegit Carolus Liber Baro de Hügel who gave it the name Leptospermum robustum from specimens collected by Hugel near the Swan River. [5] [6] In 1843, John Lindley transferred the species to Hypoclymma as H. robustum in Edwards's Botanical Register. [7]
Hypocalymma robustum grows in woodland in gravelly lateritic and sandy soils in undulating terrain from near Bindoon to Pemberton, including Perth and the Leeuwin-Naturaliste National Park in the Jarrah Forest, Swan Coastal Plain and Warren bioregions of south-western Western Australia. [3] [2]
Its attractive flowers and compact size make H. robustum a desirable garden plant. [8] However, it does need a climate where the summers are dry. It requires good drainage and prefers a sunny or partially shaded position and has moderate frost resistance. Propagation is from semi-mature cuttings or seed. [8]
Verticordia pennigera, commonly known as native tea, is a flowering plant in the myrtle family, Myrtaceae, and is endemic to the south-west of Western Australia. It is usually a small erect or prostrate shrub with small leaves and lightly-scented spikes of pale pink to magenta-coloured flowers in spring.
Hypocalymma angustifolium, commonly known as white myrtle, or pink-flowered myrtle, is a species of flowering in the myrtle family Myrtaceae, and is endemic to the south west region of Western Australia. The Noongar peoples know the plant as koodgeed or kudjidi. It is an erect, multi-stemmed shrub with narrowly linear leaves, white or pale pink flowers.
Darwinia vestita, commonly known as pom-pom darwinia, is a species of flowering plant in the family Myrtaceae and is endemic to the southwest of Western Australia. It is an erect, bushy shrub with crowded egg-shaped, oblong, or linear leaves and more or less spherical heads of white to reddish-pink flowers.
Apectospermum spinescens, commonly known as the spiny tea tree, is a species of spiny shrub that is endemic to Western Australia. It has thick, egg-shaped to elliptical leaves on a short petiole, white or greenish cream flowers, and fruit that remain in the plant for years after reaching maturity.
Boronia cymosa, commonly known as granite boronia, is a plant in the citrus family Rutaceae and is endemic to the south-west of Western Australia. It is an erect shrub with linear, more or less cylindrical leaves and groups of relatively small, pink four-petalled flowers arranged on branched flowering stems.
Marianthus candidus, commonly known as white marianthus, is a species of flowering plant in the family Pittosporaceae and is endemic to the south-west of Western Australia. It is a twining shrub or climber with elliptic leaves and white flowers arranged in groups of twenty to thirty and becoming fawn or pink as they age.
Hemiandra linearis, commonly known as speckled snakebush, is a species of prostrate to ascending shrub that is endemic to the south-west of Western Australia.
Comesperma integerrimum is a twining shrub or climber in the family Polygalaceae.
Goodenia fasciculata is a species of flowering plant in the family Goodeniaceae and is endemic to the south-west of Western Australia. It an ascending shrub with bunched, narrow linear stem leaves and spikes of white flowers.
Hibbertia perfoliata is a species of flowering plant in the family Dilleniaceae and is endemic to Western Australia. It is a weak, ascending or prostrate, spreading shrub that typically grows to a height of up to 40 cm (16 in). It flowers from September to December or from January to March and has yellow flowers. The species was first formally described in 1837 by Stephan Endlicher from an unpublished description by Charles von Hügel and Endlicher's description was published in his book Enumeratio plantarum quas in Novae Hollandiae ora austro-occidentali ad fluvium Cygnorum et in sinu Regis Georgii collegit Carolus Liber Baro de Hügel. The specific epithet (perfoliata) means "perfoliate".
Hibbertia racemosa, commonly known as stalked guinea flower, is a species of flowering plant in the family Dilleniaceae and is endemic to the south-west of Western Australia. It is an erect or ascending, spreading shrub that typically grows to a height of 10–75 cm (3.9–29.5 in) and produces yellow flowers between July and December.
Kennedia carinata is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a prostrate shrub with trifoliate leaves and reddish-purple, pea-like flowers.
Mirbelia spinosa is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a spiny shrub with narrowly linear leaves and yellow, orange and reddish-brown flowers.
Lechenaultia floribunda, commonly known as free-flowering leschenaultia, is a species of flowering plant in the family Goodeniaceae and is endemic to the south-west of Western Australia. It is an openly-branched shrub or subshrub with crowded, narrow, fleshy leaves and compact groups of pale blue to pale mauve or creamy white flowers.
Sphaerolobium alatum is a species of flowering plant in the family Fabaceae and is endemic to the south of Western Australia. It is a slender, leafless shrub with yellow and reddish-brown flowers from September to November.
Sphaerolobium linophyllum is a species of flowering plant in the family Fabaceae and is endemic to the south of Western Australia. It is a prostrate to ascending shrub with a few narrowly linear leaves and red, yellow and orange flowers.
Spyridium buxifolium is a species of flowering plant in the family Rhamnaceae and is endemic to New South Wales. It is a spreading shrub with egg-shaped to elliptic leaves, and heads of white, softly-hairy flowers with brown bracts at the base of the heads.
Hovea longipes is a species of flowering plant in the family Fabaceae and is endemic to north-eastern Australia. It is a shrub or tree with narrowly elliptic to lance-shaped leaves, and deep indigo-blue and white, pea-like flowers.
Billardiera speciosa is a species of flowering plant in the family Pittosporaceae and is endemic to southern Western Australia. It is a slender climber that grows in coastal heath and has narrowly elliptic leaves with the edges rolled under and groups of purple or mauve flowers.
Xanthosia huegelii is a weak, low-lying to erect or ascending perennial herb or subshrub in the family Apiaceae and is endemic to southern Australia. It usually has trifoliate leaves and hairy white flowers in umbels of 3 to 6.