Cephalotus

Last updated

Contents

Cephalotus
Cephalotus follicularis 0001.JPG
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Oxalidales
Family: Cephalotaceae
Dumort. [2]
Genus: Cephalotus
Labill.
Species:
C. follicularis
Binomial name
Cephalotus follicularis
Labill.
Cephalotus distribution.svg
Global range

Cephalotus ( /ˌsɛfəˈltəs/ or /ˌkɛfəˈltəs/ ; Greek: κεφαλή "head", and οὔς/ὠτός "ear", to describe the head of the anthers) [3] is a genus which contains one species, Cephalotus follicularis the Albany pitcher plant, [4] a small carnivorous pitcher plant. The pit-fall traps of the modified leaves have inspired the common names for this plant, which include 'Albany pitcher plant", "Western Australian pitcher plant", "Australian pitcher plant", or "fly-catcher plant." It is an evergreen herb that is endemic to peaty swamps in the southwestern corner of Western Australia. [5]

Description

Cephalotus follicularis is a small, low growing, herbaceous species. Evergreen leaves appear from underground rhizomes, are simple with an entire leaf blade, and lie close to the ground. The insectivorous leaves are small and have the appearance of moccasins, forming the 'pitcher' of the common name. The pitchers develop a dark red colour in high light levels but stay green in shadier conditions. The foliage is a basal arrangement that is closely arranged with outward facing adapted leaf blades. These leaves give the main form of the species a height around 20 cm.

The 'pitcher' trap of the species is similar to other pitcher plants. The peristome at the entrance of the trap has a spiked arrangement that allows the prey to enter, but hinders its escape. The lid over the entrance, the operculum, prevents rainwater entering the pitcher and thus diluting the digestive enzymes inside. Insects trapped in this digestive fluid are consumed by the plant. The operculum has translucent cells which confuse its insect prey as they appear to be patches of sky.

The inflorescence is groupings of small, hermaphroditic, six-parted, regular flowers, which are creamy, or whitish.

In the cooler months of winter (down to about 5 degrees Celsius), they have a natural dormancy period of about 3–4 months, triggered by the temperature drop and reduced light levels.

Taxonomy

Taxonomic history

Botanical specimens were first collected during the visit of HMS Investigator to King George Sound in December 1801 and January 1802. On 2 January 1802 the expedition's botanist, Robert Brown, wrote in his diary:

"Remaind on board. Described a few plants. Mr Good went in search of the pitcher plant wch Messrs Bauer & Westall had found yesterday in flower. He returned with it in the evening." [6]

Plate 3119, Curtis's Botanical Magazine, details by Ferdinand Bauer Curtis's Botanical Magazine, Plate 3119 (Volume 58, 1831).png
Plate 3119, Curtis's Botanical Magazine , details by Ferdinand Bauer

This represents the earliest documentary reference to this species; and although not entirely unambiguous as to the first collection, it is usually taken as evidence that the plant was discovered by Ferdinand Bauer and William Westall on 1 January 1802. Whether or not there was an earlier collection is largely immaterial, however, as all collections were incorporated into Brown's collection without attribution, so Brown is treated as the collector in botanical contexts.

Brown initially gave this species the manuscript name "'Cantharifera paludosa' KG III Sound", [7] but this name was not published, and it would not be Brown who published the first description.

The following year, further specimens were collected by Jean Baptiste Leschenault de la Tour, botanist to Nicolas Baudin's expedition. In 1806, Jacques Labillardière used these specimens as the basis of his publication of the species in Novae Hollandiae plantarum specimen . [8] Labillardière did not attribute Leschenault as the collector, and it was long thought that Labillardière had collected the plant himself during his visit to the area in the 1790s; in particular, Brown wrongly acknowledged Labillardière as the discoverer of this plant.

Leschenault's specimen was a fruiting plant, but the fruit was in poor condition, and as a result Labillardière erroneously placed it in the family Rosaceae. This error was not corrected until better fruiting specimens were collected by William Baxter in the 1820s. These were examined by Brown, who concluded that the plant merited its own family, and accordingly erected Cephalotaceae. It has remained in this monogeneric family ever since. [9]

Current placement

The Australian pitcher plant is an advanced rosid, and thus closer related to apples and oaks than to other pitcher plants like Nepenthaceae (basal core eudicots) and Sarraceniaceae (basal asterids). The placement of its monotypic family Cephalotaceae in the order Saxifragales has been abandoned. It is now placed within the order of Oxalidales where it is most closely related to Brunelliaceae, Cunoniaceae, and Elaeocarpaceae. [10] The monotypic arrangement of the family and genus is indicative of a high degree of endemism, one of four such species of the region.

Cephalotus follicularis in typical habitat in coastal SW-Australia Cephalotus follicularis Hennern 4.jpg
Cephalotus follicularis in typical habitat in coastal SW-Australia

Ecology

The plant occurs in southern coastal districts of the Southwest botanical province in Australia; it has been recorded in the Warren, southern Jarrah Forest, and Esperance Plains regions. Its habitat is on moist peaty sands found in swamps or along creeks and streams, but it is tolerant of less damp situations. Its population in the wild has been reduced by habitat destruction and overcollecting; it is therefore classified as vulnerable species (VU A2ac; C2a(i)) by the IUCN. [1] However, this classification is not in unison with Australia's national EPBC Act List of Threatened Species [11] or Western Australia's Wildlife Conservation Act 1950, which both list the species as Not Threatened. [4]

The larvae of Badisis ambulans , an ant-like wingless micropezid fly, develop inside the pitchers. They have never been found anywhere else. [12]

Cultivation

Cephalotus follicularis: a young plant of about 2-3 years, grown in cultivation CephalotusFollicularis2.JPG
Cephalotus follicularis: a young plant of about 2–3 years, grown in cultivation

Cephalotus are cultivated worldwide. In the wild, they prefer warm day-time temperatures of up to 25 degrees Celsius during the growing season, coupled with cool night-time temperatures. It is commonly grown in a mixture of sphagnum peat moss, perlite, and sand, a reasonable humidity (60–80%) is also preferred. It is successfully propagated from root and leaf cuttings, usually non-carnivorous leaves although pitchers can also be used. A dormancy period is probably crucial to long-term health of the plant.

The plants become colourful and grow vigorously when kept in direct sunlight, while plants cultivated in bright shade remain green.

Living plants were delivered to Kew Gardens by Phillip Parker King in 1823. A specimen flowered in 1827 and provided one source for an illustration in Curtis's Botanical Magazine . [3]

This plant is a recipient of the Royal Horticultural Society's Award of Garden Merit. [13]

Inflorescence of Cephalotus follicularis in cultivation. Inflorescence C. follicularis.jpg
Inflorescence of Cephalotus follicularis in cultivation.

There are several dozen Cephalotus clones that exist in cultivation; nine have been officially registered as cultivars. One of the most well-known is 'Eden Black', a cultivar with unusually dark-coloured pitchers. [14]

Genomics

The genome of the pitcher plant Cephalotus follicularis has been sequenced. [15] [16] Its carnivorous and non-carnivorous leaves have been compared to identify genetic differences associated with key features relating to the attraction of prey and their capture, digestion and nutrient absorption. Results support the independent convergent evolution of Cephalotus and other carnivorous plant lineages. but also suggest that different lineages co-opted similar genes in developing digestive functions. This implies that the ways in which carnivory can be developed are limited. [17] [18] [16]

See also

Related Research Articles

<span class="mw-page-title-main">Pitcher plant</span> Carnivorous plant

Pitcher plants are several different carnivorous plants that have modified leaves known as pitfall traps—a prey-trapping mechanism featuring a deep cavity filled with digestive liquid. The traps of what are considered to be "true" pitcher plants are formed by specialized leaves. The plants attract and drown their prey with nectar.

<span class="mw-page-title-main">Oxalidales</span> Order of eudicot flowering plants

Oxalidales is an order of flowering plants, included within the rosid subgroup of eudicots. This group comprises six families that contain approximately 2000 species in 58 genera. They are trees, shrubs or woody vines which are found in the wet tropics, particularly on mountains, and warm temperate zones, especially in the southern hemisphere. Compound leaves are common in Oxalidales and the majority of the species in this order have five or six sepals and petals. The following families are typically placed here:

In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. In contrast, an oligotypic taxon contains more than one but only a very few subordinate taxa.

<span class="mw-page-title-main">Lentibulariaceae</span> Family of carnivorous plants

Lentibulariaceae is a family of carnivorous plants containing three genera: Genlisea, the corkscrew plants; Pinguicula, the butterworts; and Utricularia, the bladderworts.

<i>Stylidium</i> Genus of plants

Stylidium is a genus of dicotyledonous plants that belong to the family Stylidiaceae. The genus name Stylidium is derived from the Greek στύλος or stylos, which refers to the distinctive reproductive structure that its flowers possess. Pollination is achieved through the use of the sensitive "trigger", which comprises the male and female reproductive organs fused into a floral column that snaps forward quickly in response to touch, harmlessly covering the insect in pollen. Most of the approximately 300 species are only found in Australia, making it the fifth largest genus in that country. Triggerplants are considered to be protocarnivorous or carnivorous because the glandular trichomes that cover the scape and flower can trap, kill, and digest small insects with protease enzymes produced by the plant. Recent research has raised questions as to the status of protocarnivory within Stylidium.

<i>Adenanthos</i> Genus of Australian native shrubs in the flowering plant family Proteaceae

Adenanthos is a genus of Australian native shrubs in the flowering plant family Proteaceae. Variable in habit and leaf shape, it is the only genus in the family where solitary flowers are the norm. It was discovered in 1791, and formally published by Jacques Labillardière in 1805. The type species is Adenanthos cuneatus, and 33 species are recognised. The genus is placed in subfamily Proteoideae, and is held to be most closely related to several South African genera.

<i>Banksia <span style="font-style:normal;">ser.</span> Dryandra</i> Series of Banksia species in the plant family Proteaceae

Banksia ser. Dryandra is a series of 94 species of shrub to small tree in the plant genus Banksia. It was considered a separate genus named Dryandra until early 2007, when it was merged into Banksia on the basis of extensive molecular and morphological evidence that Banksia was paraphyletic with respect to Dryandra.

<i>Banksia repens</i> Species of shrub in the family Proteaceae native to Western Australia

Banksia repens, the creeping banksia, is a species of shrub in the plant genus Banksia. It occurs on the south coast of Western Australia from D'Entrecasteaux National Park in the west to Mount Ragged in the east.

<i>Archaeamphora</i> Fossil species of Cretaceous-aged flowering plant

Archaeamphora longicervia is a fossil plant species, the only member of the hypothetical genus Archaeamphora. Fossil material assigned to this taxon originates from the Yixian Formation of northeastern China, dated to the Early Cretaceous.

<i>Adenanthos sericeus</i> Species of shrub native to the south coast of Western Australia

Adenanthos sericeus, commonly known as woolly bush, is a shrub native to the south coast of Western Australia. It has bright red but small and obscure flowers, and very soft, deeply divided, hairy leaves.

<i>Utricularia dichotoma</i> Species of plant

Utricularia dichotoma, commonly known as fairy aprons, is a variable, perennial species of terrestrial bladderwort. It is a widespread species with mauve or purple fan-shaped flowers on a slender stalk and usually grows in wet locations.

Amphibolis antarctica is a species of flowering plant in the family Cymodoceaceae. It is referred to by the common names wire weed or sea nymph, and is a seagrass found in coastal waters of southern and western Australia.

<span class="mw-page-title-main">Carnivorous plant</span> Plants that consume animals

Carnivorous plants are plants that derive some or most of their nutrients from trapping and consuming animals or protozoans, typically insects and other arthropods, and occasionally small mammals and birds. They still generate all of their energy from photosynthesis. They have adapted to grow in waterlogged sunny places where the soil is thin or poor in nutrients, especially nitrogen, such as acidic bogs. They can be found on all continents except Antarctica, as well as many Pacific islands. In 1875, Charles Darwin published Insectivorous Plants, the first treatise to recognize the significance of carnivory in plants, describing years of painstaking research.

<span class="mw-page-title-main">Flora of Western Australia</span>

The flora of Western Australia comprises 10,551 published native vascular plant species and a further 1,131 unpublished species. They occur within 1,543 genera from 211 families; there are also 1,317 naturalised alien or invasive plant species more commonly known as weeds. There are an estimated 150,000 cryptogam species or nonvascular plants which include lichens, and fungi although only 1,786 species have been published, with 948 algae and 672 lichen the majority.

<i>Adenanthos obovatus</i> Shrub of the family Proteaceae, endemic to southwest Australia

Adenanthos obovatus, commonly known as basket flower, or, jugflower, is a shrub of the plant family Proteaceae endemic to Southwest Australia. Described by French naturalist Jacques Labillardière in 1805, it had first been collected by Archibald Menzies in 1791. Within the genus Adenanthos, it lies in the section Eurylaema and is most closely related to A. barbiger. A. obovatus has hybridized with A. detmoldii to produce the hybrid A. × pamela. Several common names allude to the prominent red flowers of the species. It grows as a many-stemmed spreading bush up to 1 m (3.3 ft) high, and about 1.5 m (4.9 ft) across, with fine bright green foliage. Made up of single red flowers, the inflorescences appear from April to December, and peak in spring.

<i>Novae Hollandiae Plantarum Specimen</i>

Novae Hollandiae Plantarum Specimen is a two-volume work describing the flora of Australia. Facsimiles of the originals can be found in the online Biodiversity Heritage Library (Vol.1) and Vol 2).

<i>Muehlenbeckia adpressa</i> Species of plant

Muehlenbeckia adpressa, commonly known as climbing lignum, is a prostrate or climbing plant, native to Australia. It has thin red-brown stems up to 1 metre in length. The leaves are 1.5–6 centimetres (0.59–2.36 in) long and 1.5–3.5 centimetres (0.59–1.38 in) wide. It occurs in coastal areas of Western Australia, South Australia, Tasmania, Victoria and New South Wales.

<i>Adenanthos cuneatus</i> Shrub of the family Proteaceae native to the south coast of Western Australia

Adenanthos cuneatus, also known as coastal jugflower, flame bush, bridle bush and sweat bush, is a shrub of the family Proteaceae, native to the south coast of Western Australia. The French naturalist Jacques Labillardière originally described it in 1805. Within the genus Adenanthos, it lies in the section Adenanthos and is most closely related to A. stictus. A. cuneatus has hybridized with four other species of Adenanthos. Growing to 2 m high and wide, it is erect to prostrate in habit, with wedge-shaped lobed leaves covered in fine silvery hair. The single red flowers are insignificant, and appear all year, though especially in late spring. The reddish new growth occurs over the summer.

<i>Stylidium glaucum</i> Species of carnivorous plant

Stylidium glaucum, the grey triggerplant, is a herbaceous plant found along the southern coast of Southwest Australia, West of Albany. The plant attains a height between 0.15 and 0.65 metres. The leaves are lanceolate in form, becoming pointed at the base, and moderately acute at the tip. These are between 20 and 70 millimetres in length and 2 to 9 millimetres in width, are hairless, and have an entire margin. The trivial name of the species, glaucum, refers to the greyish colour of the leaves. The scape is hairless, supporting a racemose arrangement of white or pink flowers that appear from January to May.

<span class="mw-page-title-main">Australian pitcher plant</span> Carnivorous herbaceous plant

The Australian pitcher plant, also known as Albany pitcher plant, is the only species of plant in the Cephalotaceae family and Oxalidales order. It can be found exclusively in moist conditions in a small region in southwest Australia and is considered to be a carnivorous plant. Similar to the not related Nepenthes, it catches its victims with pitfall traps.

References

  1. 1 2 Bourke, G.; Cross, A.; Nunn, R.; Kalfas, N. (17 January 2020). "Cephalotus follicularis". doi: 10.2305/iucn.uk.2020-1.rlts.t39635a19631881.en . S2CID   243022719.{{cite journal}}: Cite journal requires |journal= (help)
  2. Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III". Botanical Journal of the Linnean Society. 161 (2): 105–121. doi: 10.1111/j.1095-8339.2009.00996.x . hdl: 10654/18083 .
  3. 1 2 Hooker, William Jackson (1831). "Cephalotus follicularis. Follicled Cephalotus". Curtis's Botanical Magazine. 58. Samuel Curtis: Pl. 3118 & 3119.
  4. 1 2 Attractions, Western Australian Herbarium, Biodiversity and Conservation Science, Department of Biodiversity, Conservation and. "FloraBase—the Western Australian Flora". florabase.dpaw.wa.gov.au. Retrieved 2018-08-29.{{cite web}}: CS1 maint: multiple names: authors list (link)
  5. Heywood, V.H.; Brummitt, R.K.; Culham, A.; Seberg, O. (2007). Flowering Plant Families of the World. Ontario, Canada: Firefly Books. p. 94. ISBN   978-1-55407-206-4.
  6. Vallance, T. G.; Moore, D. T.; Groves, E. W. (2001). Nature's Investigator: The Diary of Robert Brown in Australia, 1801–1805. Canberra: Australian Biological Resources Study. ISBN   0-642-56817-0.
  7. "Cephalotus follicularis Labill". Robert Brown's Australian Botanical Specimens, 1801–1805 at the BM. Retrieved 2009-01-10.
  8. Hopper, Stephen (2003). "South-western Australian, Cinderella of the world's temperate floristic regions 1". Curtis's Botanical Magazine. 20 (2): 101–126. doi:10.1111/1467-8748.00379.
  9. Mabberley, D. J. (1985). "Chapter IX: The natural system". Jupiter Botanicus: Robert Brown of the British Museum. Braunschweig: J. Cramer. pp. 141–176. ISBN   3-7682-1408-7.
  10. Angiosperm Phylogeny Website , retrieved 9 January 2016
  11. "Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act)". Australian Government. Retrieved 14 March 2022.
  12. McAlpine, David K. (1998). "Review of the Australian stilt flies (Diptera : Micropezidae) with a phylogenetic analysis of the family". Invertebrate Systematics. 12 (1): 55. doi:10.1071/IT96018.
  13. "Cephalotus follicularis". www.rhs.org. Royal Horticultural Society. Retrieved 12 April 2020.
  14. "The Carnivorous Plant FAQ: Cephalotus: various types". www.sarracenia.com. Retrieved 2020-06-02.
  15. "Evolution of the Oxalidales Carnivore". International Carnivorous Plant Society (ICPS). Retrieved 14 March 2022.
  16. 1 2 Fukushima, Kenji; Fang, Xiaodong; Alvarez-Ponce, David; Cai, Huimin; Carretero-Paulet, Lorenzo; Chen, Cui; Chang, Tien-Hao; Farr, Kimberly M.; Fujita, Tomomichi; Hiwatashi, Yuji; Hoshi, Yoshikazu; Imai, Takamasa; Kasahara, Masahiro; Librado, Pablo; Mao, Likai; Mori, Hitoshi; Nishiyama, Tomoaki; Nozawa, Masafumi; Pálfalvi, Gergő; Pollard, Stephen T.; Rozas, Julio; Sánchez-Gracia, Alejandro; Sankoff, David; Shibata, Tomoko F.; Shigenobu, Shuji; Sumikawa, Naomi; Uzawa, Taketoshi; Xie, Meiying; Zheng, Chunfang; Pollock, David D.; Albert, Victor A.; Li, Shuaicheng; Hasebe, Mitsuyasu (6 February 2017). "Genome of the pitcher plant Cephalotus reveals genetic changes associated with carnivory". Nature Ecology & Evolution. 1 (3): 59. Bibcode:2017NatEE...1...59F. doi: 10.1038/s41559-016-0059 . ISSN   2397-334X. PMID   28812732. S2CID   6223440.
  17. Pain, Stephanie (2 March 2022). "How plants turned predator". Knowable Magazine. doi: 10.1146/knowable-030122-1 . Retrieved 11 March 2022.
  18. Hedrich, Rainer; Fukushima, Kenji (17 June 2021). "On the Origin of Carnivory: Molecular Physiology and Evolution of Plants on an Animal Diet". Annual Review of Plant Biology. 72 (1): 133–153. doi: 10.1146/annurev-arplant-080620-010429 . ISSN   1543-5008. PMID   33434053. S2CID   231595236.