Verticordia polytricha

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Northern cauliflower
Status DECF P4.svg
Priority Four — Rare Taxa (DEC)
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Myrtales
Family: Myrtaceae
Genus: Verticordia
Subgenus: Verticordia subg. Verticordia
Section: Verticordia sect. Corymbiformis
Species:
V. polytricha
Binomial name
Verticordia polytricha

Verticordia polytricha, commonly known as northern cauliflower, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an erect, bushy shrub with linear leaves and dense heads of white flowers in late spring and summer.

Contents

Description

Verticordia polytricha is a shrub with a single stem at its base but which is densely branched and bushy. It grows to a height of 0.7–1.8 m (2–6 ft) and 0.6–1.0 cm (0.2–0.4 in) wide. Its leaves are linear in shape, semi-circular or triangular in cross-section, 3–10 mm (0.1–0.4 in) long and those near the ends of the branches are crowded. [2]

The flowers are scented and arranged in dense, corymb-like groups near the ends of the branches, each flower on a stalk about 2–5 mm (0.08–0.2 in) long. The floral cup is hemispherical, 1.0–1.5 mm (0.04–0.06 in) long and hairy on the upper half. The sepals are creamish-white, about 3 mm (0.1 in) long and have a fringe of long hairs. The petals are the same colour as the sepals, spreading at first, erect later, 1.0–1.5 mm (0.04–0.06 in) long and hairy on the outside. The style is 4.5 mm (0.2 in) long, gently curved and hairy near the purple-coloured tip. Flowering time is from late September to February. [2]

Taxonomy and naming

Verticordia polytricha was first formally described by George Bentham in 1859 from a specimen collected by Augustus Oldfield and the description was published in Flora Australiensis . [1] [3] The specific epithet (polytricha) is derived from the Ancient Greek words poly meaning "many" [4] :564 and thrix meaning "hair" [4] :392 referring to the hairs on the sepals. [2]

In his review of the genus in 1991, Alex George placed this species in subgenus Verticordia, section Corymbiformis along with V. densiflora , V. brownii , V. eriocephala and V. capillaris . [5]

Distribution and habitat

This verticordia occurs between Binnu and Kalbarri and nearby areas in the Geraldton Sandplains, Jarrah Forest and Yalgoo biogeographic regions where it grows in sand, usually over sandstone in heath and shrubland. [2] [6] [7]

Ecology

A native bee, Euryglossa evansi has been observed visiting flowers of this verticordia. [8]

Conservation

Verticordia polytricha is classified as "Priority Four" by the Western Australian Government Department of Parks and Wildlife, [6] meaning that is rare or near threatened. [9]

Use in horticulture

Northern cauliflower is a hardy and reliable shrub in gardens and is readily propagated from cuttings but can also be grown from seed. It has been grown successfully in full sun in a range of soils and has flowered within 18 months of seed germination. [2]

Related Research Articles

<i>Verticordia brownii</i> Species of plant

Verticordia brownii, commonly known as pink brownii or pink cauliflower is a flowering plant in the myrtle family, Myrtaceae, and is endemic to the south-west of Western Australia. It has small, neatly arranged, oval leaves and heads of pale pink to magenta or white flowers. It was one of the first verticordias to be collected, although it was not initially known by that name. The collection was made by Robert Brown on the Bass and Flinders circumnavigation of the Australian mainland on HMS Investigator.

<i>Verticordia eriocephala</i> Species of flowering plant

Verticordia eriocephala, commonly known as lambswool, and common, native or wild cauliflower is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a shrub with one densely branching, spreading main stem, small leaves and dense heads of creamy-white flowers, giving rise to the common names "lambswool" and "cauliflower". It is widespread over its range but becoming less common because of land clearing and illegal collecting of the flowers.

<i>Verticordia blepharophylla</i> Species of flowering plant

Verticordia blepharophylla is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an erect, open shrub with a single main stem, leaves with hairy margins and pale to deep mauve-pink flowers and which occurs in an area between Perth and Geraldton.

Verticordia capillaris is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a shrub with a single stem at the base, small leaves and creamy white or occasionally pink flowers in dense corymb-like groups. It is common in small areas near Geraldton.

<i>Verticordia habrantha</i> Species of flowering plant

Verticordia habrantha, commonly known as hidden featherflower, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a slender shrub with short, leafy side-branches and long flowering stems with rounded heads of mostly white flowers. Its hairy sepals are mostly hidden by the round, unfringed petals, and as a result, the plant looks like shrubs in the genus Chamelaucium, to which it is closely related.

<i>Verticordia halophila</i> Species of flowering plant

Verticordia halophila, commonly known as salt-loving featherflower, or salt-loving verticordia, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is an erect, bushy shrub with small, crowded, thick leaves and spikes of red and pink flowers in spring.

Verticordia harveyi, commonly known as autumn featherflower, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a slender, spindly shrub with relatively long leaves and small white, pink or magenta-coloured flowers in late summer and autumn.

<i>Verticordia helichrysantha</i> Species of flowering plant

Verticordia helichrysantha, commonly known as coast featherflower or Barrens featherflower, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a small, woody, open-branched shrub with crowded, linear leaves and small yellow flowers from May to September.

Verticordia verticordina is a flowering plant in the myrtle family, Myrtaceae and is endemic to a small area near the coast of the south-west of Western Australia. It is a small, low-growing shrub with crowded leaves and in spring, scattered pale greenish-cream and golden brown flowers. Its unusual flowers and fleshy leaves give the plant a superficial resemblance to a Darwinia.

<i>Verticordia spicata</i> Species of flowering plant

Verticordia spicata, commonly known as spiked featherflower, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is usually a dense, bushy shrub with small leaves pressed against the stem and spikes of pink flowers from late spring to early summer.

<i>Verticordia densiflora</i> Species of flowering plant

Verticordia densiflora, commonly known as compacted featherflower, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a shrub with small leaves, usually small pink and white flowers and which is widespread in the south-west of the state. It is a variable species and in his 1991 paper, Alex George formally described five varieties.

<i>Verticordia fimbrilepis <span style="font-style:normal;">subsp.</span> fimbrilepis</i> Subspecies of flowering plant

Verticordia fimbrilepis subsp. fimbrilepis is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a small bushy shrub with one openly branched main stem at its base, small, pointed leaves and rounded groups of pink flowers near the ends of the branches.

<i>Verticordia humilis</i> Species of flowering plant

Verticordia humilis, commonly known as small featherflower, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a small shrub with leafy branches and scattered, mostly red flowers hanging loosely near the ends of the branches.

Verticordia lehmannii is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is slender shrub with only a few branches, well-spaced, oppositely arranged leaves and small heads of pale pink to silvery flowers with a dark pink centre.

<i>Verticordia lindleyi</i> Species of flowering plant

Verticordia lindleyi is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is sometimes an openly branched shrub, other times more or less dense, with small leaves and spreading, spike-like groups of pink or purple flowers along the stems in summer, sometimes also in autumn.

Verticordia minutiflora is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a bushy shrub with small, crowded, cylindrical leaves and groups of white to pale pink flowers in summer and autumn. As suggested by its botanical name, it has the smallest flowers of any verticordia.

Verticordia mirabilis is a flowering plant in the myrtle family, Myrtaceae and is endemic to a small area in the Gibson Desert. It is a bushy, spreading shrub with its leaves mostly crowded on short side branches and with large, deep red flowers in small groups in spring.

Verticordia mitodes is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a shrub with a single, highly-branched main stem, small leaves and small spikes of magenta-coloured flowers in late spring.

Verticordia pityrhops, commonly known as East Mount Barren featherflower or pine-like featherflower, is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a single-stemmed shrub which is densely-branched with crowded narrow linear leaves giving the impression of a miniature pine tree. When it flowers in autumn, the shrub is completely covered with masses of very small, honey-scented, pinkish-purple flowers.

Verticordia pulchella is a flowering plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a much-branched shrub with short, narrow leaves and feathery red or red and yellow flowers with long styles in spring and early summer.

References

  1. 1 2 "Verticordia polytricha". APNI. Retrieved 15 July 2016.
  2. 1 2 3 4 5 Elizabeth A. (Berndt) George; Margaret Pieroni (illustrator) (2002). Verticordia: the turner of hearts (1st ed.). Crawley, Western Australia: University of Western Australia Press. pp. 214–215. ISBN   1-876268-46-8.
  3. Bentham, George; von Mueller, Ferdinand (1867). Flora Australiensis (Volume 3). London: Lovell Reeve and Co. p. 25.
  4. 1 2 Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press.
  5. George, A.S. (1991) New taxa, combinations and typifications in Verticordia (Myrtaceae: Chamelaucieae). Nuytsia 7(3): 254
  6. 1 2 "Verticordia pholidophylla". FloraBase . Western Australian Government Department of Biodiversity, Conservation and Attractions.
  7. Paczkowska, Grazyna; Chapman, Alex R. (2000). The Western Australian flora : a descriptive catalogue. Perth: Wildflower Society of Western Australia. p. 410. ISBN   0646402439.
  8. Groom, Philip K.; Lamont, Byron B. (2014). Plant Life of Southwestern Australia Adaptations for Survival. Berlin: De Gruyter. p. 133. ISBN   9783110370164.
  9. "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 15 July 2016.