Phaneroglossa

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Phaneroglossa
Phaneroglossa Helme 2.jpg
Phaneroglossa Helme 6.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subfamily: Asteroideae
Tribe: Senecioneae
Genus: Phaneroglossa
B.Nord.
Species:
P. bolusii
Binomial name
Phaneroglossa bolusii
(Oliv.) B.Nord.
Synonyms [1]

Senecio bolusii

Phaneroglossa is a genus of plants that is assigned to the daisy family. It consists of only one species, Phaneroglossa bolusii, a perennial plant of up to 40 cm (1+13 ft) high, that has leathery, line- to lance-shaped, seated leaves with mostly few shallow teeth and flower heads set individually on top of long stalks. The flower head has an involucre of just one whorl of bracts, few elliptic, white or cream ray florets, and many yellow disc florets. It is an endemic species of the Western Cape province of South Africa. [2] Flowering mainly occurs from November to January. [3]

Contents

Description

Habit Phaneroglossa Helme 3.jpg
Habit

Phaneroglossa is a low, up to 40 cm (1+13 ft) high, perennial plant that is hairless except for the woolly leaf axils, and has short, woody, upwardly inclined stems. Its leaves are crowded on the short stems, leathery in consistency, and set alternately along the stem. The leaves are line-, lance- or inverted lance-shaped, with a conspicuous midvein, seated with the base more of less clasping the stem, with an entire margin or some shallow teeth, often slightly curving down, the tip tapering or ending abruptly in a small sharp point as a continuation of the midvein. [2] [3]

The flower heads are set on top of long, stout, unbranched stalks with few, scattered, awl-, line- or lance-shaped bracts. The flowerhead has an involucre that is initially cup-shaped with a flat base, later becomes broadly cone-shaped, while the bracts eventually flip down to press against the stem when the seeds are ripe. It consists of a single whorl of eleven to fifteen lance-shaped, leathery bracts, with one or three resin ducts tapering to a long point, that are merged at their base, with a distinct thin and dryish margin that has a fringe of soft hairs towards the tips. The common base of the florets is flat and wide, without bracts at the foot of each floret, with a smooth surface except for regularly distributed indents where the florets are implanted. [2]

The flower heads each have five to eight female ray florets that consist of a closed tube at base and a strap nearer the top. The tube is cylinder-shaped and has a few to many blunt hairs, which are several rows of cells thick and are topped with glands. The straps are white or cream-coloured, elliptic or obtuse in shape, mostly have four veins and is split in three teeth at the tip. From the mouth of the ray floret tube emerges a style that splits in two outward curling, hairless branches each topped by an obtuse conical appendage. Surrounding the base of the ray floret corolla are many, white, barbed pappus bristles which are quickly shed in the ray florets. At the base of the ray floret develop eventually dark brown to black, dry, one-seeded, indehiscent fruits called cypselae, which are oblong in shape, and have five or six wing-like, hairless ridges along their lengths. [2]

The ray florets surround many bisexual disc florets with a yellow, tube-shaped corolla that near its top splits star-like into five, outward curving oval lobes with a vein parallel to their margin, a central resin duct and a finely grainy surface near the tips. In the center of each corolla are free filaments, topped by five anthers that are merged into a tube, through which the style grows when the floret opens, hoovering up the pollen on its shaft. The anthers have an arrow-shaped base, and one large, oval appendage at their tip, that is wider than the anther. The filaments each have a distinct bulbous collar just below the anthers. The pappus of the disc florets is persistent, and the cypselae are narrowly oblong, and have always five wings covered with blunt hairs that become slimy when wet. [2]

Taxonomy

This plant was first described by Daniel Oliver in 1884, based on a specimen that had been collected by Harry Bolus on Michell's Pass near Ceres. Bertil Nordenstam, in his revision the tribe Senecioneae, erected the new genus Phaneroglossa, because of the many unusual features exhibited by P. bolusii, and the difficulty to determine its affinities to other species on morphological arguments. [2]

Phylogeny

Comparison of homologous DNA has increased the insight in the phylogenetic relationships between the Senecioneae. It shows that Phaneroglossa is most closely related to Austrosynotis rectirama , Oresbia heterocarpa and the genus Dendrosenecio . Further research that includes more species and more or other genes may change these insights. The following tree represents current insights. [4]

most other Senecioneae

Austrosynotis

Phaneroglossa

Oresbia

Dendrosenecio

includes Bethencourtia , Cineraria , Curio, Iranecio , Jacobaea , Kleinia , Packera , Pericallis

Distribution, habitat and conservation

Phaneroglossa can only be found in the Hex River Mountains and in the Kouebokkeveld Mountains near Ceres, where it grows on sandstone slopes in fynbos vegetations at high altitude. It is considered a rare species. [2] [5]

Related Research Articles

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Felicia nordenstamii is a flowering shrub in the daisy family, Asteraceae. It is found only in South Africa where it grows on limestone hills close to the sea on the southern coast. Felicia nordenstamii is a many-branched shrub growing up to 30 cm (1 ft) tall. The lower parts of the stems are covered in grayish brown bark and the upper stem has many crowded, upwardly angled, alternate leaves with long hairs on the lower surfaces. Large flower heads form at the tips of the branches, each about 412 cm across, with about thirty purplish blue ray florets surrounding many yellow disc florets.

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Felicia annectens is an annual plant of up to about 25 cm (10 in) high, that is assigned to the daisy family. The lower leaves are opposite and the higher leaves alternate. The bloated involucre consists of very broad, hairless bracts. These protect up to ten, short, bluish ray florets that encircle yellow, partly sterile disc florets. The heads sit individually on top of up to 6 cm long stalks. The species was considered extinct after no observations were made after 1915, but was rediscovered in the 21st century. It occurs in the Western Cape province of South Africa.

Felicia wrightii is a low, up to 20 cm (8 in) high, perennial, herbaceous plant with conspicuous basal leaf rosettes, and runners that end in rosettes. It has narrow bracts along the inflorescence stalks on top of which are individual flower heads with an involucre of three whorls of bracts, about sixteen ray florets with about 1 cm long, pale blue straps, that encircle many yellow disc florets. No fertile seeds have been found, so this species may solely reproduce vegetatively. The species is only known from one location in the KwaZulu-Natal Drakensberg, where it grows on damp stream banks.

<i>Felicia bergeriana</i> A annual plant in the daisy family from South Africa

Felicia bergeriana is a richly branching, hairy annual plant of up to 25 cm (10 in) high that is assigned to the daisy family. It has opposite leaves and flower heads set individually on up to 8 cm long stalks, that consist of an involucre of about 12 cm diameter with two whorls of bracts, about twelve blue ray florets surrounding more yellow disc florets. It is sometimes called kingfisher daisy in English. It can be found in the Northern and Western Cape provinces of South Africa. It is sometimes cultivated as an ornamental.

Felicia westae is a sparsely branched shrub growing up to 40 cm tall, that is assigned to the daisy family. The lower parts of the stems have lost their leaves and the upper part has many crowded, upwardly angled and curved, alternate leaves pressed against the stem, with the edges curled inward. The flower heads form at the tips of the branches, each about 313 cm across, with about twenty purplish blue ray florets surrounding many yellow disc florets. It is only known from a small area in the Eastern Cape province of South Africa.

<i>Mairia burchellii</i> Perennial plant in the daisy family from South Africa

Mairia burchellii is a tufted perennial plant of up to 15 cm (6 in) assigned to the daisy family. It has narrow leaves of up to 5 mm (0.20 in) wide, with single main vein and an entire margin. Flower heads only occur after a fire has destroyed the standing vegetation, mostly in November or between February and June. The flower heads sit individually or with a few on the tip of a purplish stalk, with a few narrow bracts, and consist of a row of pinkish ray florets around many yellow disc florets. It can be found in the southwest of the Western Cape province of South Africa.

Mairia petiolata Perennial plant in the daisy family from South Africa

Mairia petiolata is a tufted, variably hairy, perennial plant of up to 15 cm (6 in) assigned to the daisy family. Its leaves are in a ground rosette, and have a stalk of mostly 2–5 cm long and an inverted egg-shaped to elliptic, 612–9 cm (2.6–4.6 in) long and 2–3 cm wide leaf blade, with a toothed margin. It mostly has two flower heads at the tip of the branches of each erect, dark reddish brown scape. The flower heads have a bell- to cup-shaped involucre that consists of 20–24, purplish, overlapping bracts in 3–4 whorls. These protect 12–16 pink, ray florets, surrounding many yellow disc florets. This species was only seen flowering once, in December. It is known from one location in the Langeberg, Western Cape province of South Africa.

<i>Mairia robusta</i> Perennial plant in the daisy family from South Africa

Mairia robusta is a tufted, white-woolly, perennial, herbaceous plant of up to 30 cm (1 ft) high, that is assigned to the daisy family. It has large, robust, hard and leathery leaves, with a white woolly hairy, nontransparent underside, while the felty hairs on the top are lost with age. Only at a few occasions, flowers have been observed, in June, October and December, always after a fire. The flower heads sit individually at the at tip of white-woolly scapes, with 14–16 purplish pink to white ray florets surrounding a yellow disc. M. robusta is an endemic species that is restricted to rocky mountain slopes in the Western Cape province of South Africa.

Felicia clavipilosa is an upright, richly branched shrub of up to 60 cm (2 ft) high, that is assigned to the daisy family. It has alternately arranged leaves, and flower heads with 3–4 whorls of involucral bracts with many yellow disc florets in the centre. Very characteristic for the species are the short club-shaped hairs on its fruits. There are two subspecies. Subsp. clavipilosa has narrowly lance-shaped entire leaves with one vein and pale mauve ray florets. Subspecies transvaalensis has lance-shaped leaves with one or three veins and white ray florets. The species occurs in southern Africa, with subsp. clavipilosa having a western distribution in Zambia, Zimbabwe, Namibia, Botswana and South Africa, and subsp. transvaalensis restricted to the east, from Zimbabwe, through Botswana to South Africa. The subspecies transvaalensis is sometimes called pokkiesblom in Afrikaans.

Felicia mossamedensis or yellow felicia is a well-branched, roughly hairy, annual or perennial plant of up to 30 cm (1 ft) high, assigned to the daisy family. It has alternately arranged, seated, flat to slightly succulent, broad-based, entire, blunt tipped leaves. The flower heads sit individually on top of a stalk of up to 8 cm (3 in) long, have an involucre of three whorls of bracts, many yellow ray florets and many yellow disk florets. It can be found in southern Africa, in Zimbabwe, Mozambique, Botswana, Swaziland, South Africa and on the coast of Angola.

References

  1. "Phaneroglossa bolusii (Oliv.) B.Nord." The PlantList.
  2. 1 2 3 4 5 6 7 Nordenstam, Rune Bertil (1978). "Taxonomic studies in the tribe Senecioneae (Compositae)". Opera Botanica. 44: 66–68.
  3. 1 2 Manning, J.; Goldblatt, P. (2012). "Plants of the Greater Cape Floristic Region 1: the Core Cape flora" (PDF). Strelitzia. 29: 410.
  4. Pelser, Pieter B.; Nordenstam, Bertil; Kadereit, Joachim W.; Watson, Linda (2007). "Phylogeny of Senecioneae and delimitation of Senecio". Taxon . 56 (4): 1077–1104. doi:10.2307/25065905. JSTOR   25065905.
  5. "Phaneroglossa bolusii". SANBI Threatened Species Programme.