| Stylidium humphreysii | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Stylidiaceae |
| Genus: | Stylidium |
| Species: | S. humphreysii |
| Binomial name | |
| Stylidium humphreysii | |
Stylidium humphreysii is a species of trigger plant endemic to desert regions of Western Australia. [1] American botanist Sherwin Carlquist named the species after West Australian amateur botanist Fred Humphreys. [2]
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.
Allen Lowrie was a Western Australian botanist. He was recognised for his expertise on the genera Drosera and Stylidium.
Andersonia is a subgenus of Stylidium that is characterized by a linear hypanthium, recurved mature capsule walls, an erect and persistent septum, and many seeds. This subgenus occurs in areas of tropical northern Australia and into Southeast Asia and was named in honour of William Anderson, the surgeon and naturalist who sailed with James Cook.
Stylidium simulans is a dicotyledonous plant that belongs to the genus Stylidium that was described by Sherwin Carlquist in 1979. It is an erect annual plant that grows from 7 to 11 cm tall. Orbicular leaves, about 4-10 per plant, form basal rosettes. The leaves are generally 3–5.5 mm long and 1.5-3.5 mm wide. This species generally has one or two scapes and cymose inflorescences that are 7–11 cm long. Flowers are pale pink or mauve. S. simulans is endemic to the Arnhem Land plateau in the Northern Territory of Australia, but not much more is known about its distribution as it is only known from around its type location. Its reported habitat is in shallow sandy soils on a sandstone plateau. It flowers in the southern hemisphere in June. S. simulans is closely related to S. accedens. Its conservation status has been assessed as data deficient.
Stylidium nominatum is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows from 4 to 15 cm tall. The oblanceolate leaves, about 5-15 per plant, form basal rosettes around the stem and are 2.5–9 mm long, 0.5-1.5 mm wide. About 4-11 leaves per plant are also scattered along the stem and are generally 2.3-4.7 mm long and 0.3-0.5 mm wide. Scapes are absent. Inflorescences are 2–6 cm long and produce white flowers that bloom from April to June in the southern hemisphere. S. nominatum is endemic to the northern area of Kakadu National Park and Melville Island in the Northern Territory. Its habitat is recorded as being sandy soils in Melaleuca viridiflora woodlands, bases of sandstone escarpments, and gravelly yellow soil in flat, treeless areas. S. nominatum is most closely related to S. capillare. In his recent revision of the subgenus Andersonia, Anthony Bean (A.R.Bean) noted that there is a large variation recorded in the specimens of this species and more work would need to be done to determine if there's more than one taxon involved with this species. Further evaluation may reveal additional species.
Levenhookia, also known as the styleworts, is a genus of ten recognized species in the family Stylidiaceae and is endemic to Australia. The genus is restricted to Western Australia almost exclusively with a few exceptions: L. pusilla's range extends into South Australia, L. dubia's range extends through South Australia into Victoria and New South Wales, L. sonderi is native only to Victoria, and L. chippendalei is also found in the Northern Territory.
Stylidium subg. Centridium is a subgenus of Stylidium that is characterized by a globose hypanthium, a stipitate brush-like stigma, and gynostemium mobility not produced by a sensitive hinged torosus but by the movement of a cunabulum. All species with the possible and doubtful exception of S. weeliwolli are annuals. This subgenus appears to be most closely related to the genus Levenhookia, which suggests an ancestral relationship. Centridium was first published by John Lindley in the 1839 publication, A Sketch of the Vegetation of the Swan River Colony. Lindley created this subgenus to distinguish species which did not fit into either of the two other subgenera that had existed at the time. He initially placed Stylidium calcaratum, the newly described Stylidium androsaceum, and Stylidium stipitatum into subgenus Centridium. His description of S. androsaceum turned out to be synonymous with S. calcaratum and S. stipitatum is a synonym of Levenhookia stipitata.
Stylidium edentatum is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows around 6 cm tall. The elliptical leaves form a basal rosettes around the stem. The leaves are around 0.3-0.8 mm long with recurved margins. Inflorescences are produced on solitary scapes and bear flowers that are white with rose-coloured markings at the base of the corolla lobes and two tooth-shaped throat appendages present. S. edentatum was a previously overlooked species that is related to and appears similar to S. calcaratum and S. ecorne. Allen Lowrie and Sherwin Carlquist described this species in 1989 and argued that if S. ecorne is considered distinct from S. calcaratum, then certainly S. edentatum warrants placement at the species level. It differs from S. calcaratum and S. ecorne by the long petioles on its recurved leaves, and the cuneate, obtuse, and unlobed posterior corolla lobes. They also have a distinctive lateral toothlike appendage at the base of each posterior corolla lobe. S. edentatum is endemic to southwestern Western Australia.
Stylidium longicornu is a dicotyledonous plant that belongs to the genus Stylidium. It is an annual plant that grows from 10 to 30 cm tall. The obovate to spathulate leaves form a basal rosettes around the stem. The leaves are around 4–6 mm long. Inflorescences are unbranched racemes and produce flowers that are violet with white at the base and bloom from June to August in their native range. S. longicornu is endemic to the Kimberley region in Western Australia. Its habitat is recorded as being sand flats near sandstone. It grows in the presence of S. lobuliflorum, Rhynchospora, and Leptocarpus.
Stylidium perpusillum, the tiny triggerplant, is a dicotyledonous plant that belongs to the genus Stylidium, that occurs in south west Western Australia.
Drosera macrophylla, the showy sundew, is a perennial tuberous species in the genus Drosera that is endemic to Western Australia. It grows in a rosette with leaves 4 cm (2 in) long and 2 cm (1 in) wide. It is a common species east of Perth. It grows in loam soils. It flowers from June to October. D. macrophylla was first described by John Lindley in his 1839 publication A sketch of the vegetation of the Swan River Colony. In 1992, Allen Lowrie and Sherwin Carlquist described a new subspecies, D. macrophylla subsp. monantha, which is distinguished from D. macrophylla subsp. macrophylla by its single-flowered or rarely biflowered inflorescences. Subspecies monantha is abundant in the Bruce Rock/Merredin region.
Stylidium affine is a species in the genus Stylidium that is endemic to Western Australia.
Alexgeorgea is a genus of three plant species found in Western Australia belonging to the family Restionaceae named in honour of the botanist Alex George in 1976. The flowers of the female and large nut-like fruit are completely underground except for the stigmas, which extend out of the ground as 3 purple or red threads.
Sherwin John Carlquist FMLS was an American botanist and photographer.
Frederick William Humphreys was an Australian government official and an amateur photographer and botanist whose work culminated in the posthumous publication of The Banksia Book, a book on the flowering plant genus Banksia. He discovered Banksia grossa in the Stirling Range in 1967.
Stylidium divaricatum, known by the vernacular name daddy-long-legs, is a species in the genus Stylidium that is endemic to Western Australia.
Stylidium exappendiculatum is a species of dicotyledonous plant in the genus Stylidium.
Stylidium squamosotuberosum is a species of plant in the genus Stylidium. It was described in 1969 by Sherwin Carlquist. Discovered in 1969.
Stylidium arenicola is a species of dicotyledon plant in the genus Stylidium. It was described in 1969 by Sherwin Carlquist.
 | This Stylidiaceae article is a stub. You can help Wikipedia by expanding it. |