Passerina (plant)

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Passerina
Passerina obtusifolia.jpg
Passerina obtusifolia from Rooiberg Nature Reserve, South Africa.
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Thymelaeaceae
Subfamily: Thymelaeoideae
Genus: Passerina
L.
Species [1]

21; see text

Synonyms [1]
  • BalendasiaRaf. (1838)
  • ChymococcaMeisn. (1857)
  • SanamundaAdans. (1763), nom. superfl.
Passerina details of flowers Passerina (Thymeleaceae) details of flowering sprig EOS 009.JPG
Passerina details of flowers
P. montana twig, showing decussate leaves Passerina montana, loof, Clarens, a.jpg
P. montana twig, showing decussate leaves
Passerina ericoides, the Christmas Berry in fruit Passerina Ericoides ChristmasBerry Plant - Cape Town.JPG
Passerina ericoides , the Christmas Berry in fruit

Passerina is a genus in the plant family Thymelaeaceae, native to southern Africa. [1] They are ericoid bushes growing largely in fynbos and other Southern African scrub habitats.

Contents

Etymology

The genus name Passerina derives from the Latin word passer "sparrow" - given the plants in reference to a perceived similarity in the shape of the fruit to a sparrow's beak - more evident in the Thymelaceous plant Thymelaea hirsuta (formerly placed in the genus Passerina). [2]

Taxonomy

Passerina L., Sp. Pl. 559 (1753); Wright in FC. 5, 2: 9 (1915); Thoday in Kew Bull. 1924: 146, 387 (1924). Chymococca Meissn., Wright 1.c. 14, is a genus of plants in the family Thymelaeaceae . [3]

Description

Members of the genus Passerina are ericoid shrubs or shrublets, often with a tendency to having pendulous branches. Their leaves are markedly decussate. They are concave or closely involute, lined with woolly hairs, and cling to leafy stems without being large enough to cover them. This gives the plants a characteristic plaited or corded appearance. [3]

The flowers of some species are borne in terminal spikes, whereas other species bear them in a four-flowered head. Bracts, usually broader than leaves and larger than the flowers, subtend each flower. This is one helpful distinction between specimens of Passerina and plants in the genus Struthiola . [4] The calyx has four sepals, forming a flask-shaped or subcylindrical tube. At the mouth the sepals spread into lobes that are shorter than the tube. There are no petals, but the lobes of the sepals are quite colourfully petal-like in many species. The ovary is ovoid with a single loculus containing a solitary ovule. The style is lateral, bearing a mop-like stigma that fills the mouth of the calyx-tube. [3] The calyx is persistent and encloses the fruit except in species such as Passerina ericoides, in which the fruit is berry-like and expands until it protrudes out of the tube. A flower bears eight stamens of unequal length, the longest being the length of the calyx-lobes, but all protrude out of the calyx. The flowers lack of any noticeable scent, their protruding stamens, and their mop-like stigmata suggest their adaptation to wind pollination, in contrast to the petals and night scent of Struthiola. [4]

In most species the fruit is membranous, but some species, e.g. Passerina ericoides have a fleshy pericarp, forming a red berry attractive to birds and tortoises, hence one of its common names, "skilpadbessie", meaning "tortoise berry". However, that name also is applied to other plants, such as Muraltia spinosa . The seeds have a black, crustaceous testa and curved, beak-like micropyle.

As in the related Struthiola, the beak-like aspects of the fruit inspired the name "Passerina", which is from the Latin passerinus, meaning "sparrow-like". [5]

Distribution

The genus is endemic to Southern Africa, most species within South Africa, though some extend north of the border. The greatest concentration of species is in Cape fynbos, where some species are endemic to very small regions. Passerina ericoides for example occurs naturally only on the Cape Peninsula and the vicinity of False Bay [4]

Species

There are 21 accepted species in the genus Passerina. [1]

Ecological and commercial significance

Passerina is a generally insignificant genus, seldom noticed by the non-botanist. The attractive ericoid habit and fuss-free growth make it a useful subject in informal fynbos gardens. Being wind-pollinated, the plants generally are not of much importance to pollinating organisms such as bees and birds.

The Khoisan name gonna refers to the use of its tough bark, together with that of related plants, for binding such items as thatch. [4] The material certainly is remarkably tough and has been used for plaiting into whip thongs. The Khoisan use of a decoction of some species for treating pain, plus the fact that many species of the Thymelaeaceae suggests that the material might be pharmacologically active, but there is no suggestion that the plants cause harm to stock. However, this harmlessness might well be for the same reason that the plants generally are of no value as forage for browsers, namely that they are unpalatable to stock. [6]

Related Research Articles

<span class="mw-page-title-main">Fynbos</span> Shrubland and heathland ecoregion of southwestern South Africa

Fynbos is a small belt of natural shrubland or heathland vegetation located in the Western Cape and Eastern Cape provinces of South Africa. This area is predominantly coastal and mountainous, with a Mediterranean climate and rainy winters. The fynbos ecoregion is within the Mediterranean forests, woodlands, and scrub biome. In fields related to biogeography, fynbos is known for its exceptional degree of biodiversity and endemism, consisting of about 80% species of the Cape floral kingdom, where nearly 6,000 of them are endemic. This land continues to face severe human-caused threats, but due to the many economic uses of the fynbos, conservation efforts are being made to help restore it.

<span class="mw-page-title-main">Sepal</span> Any of the separate parts of the calyx of a flower (excluding the bracts), usually green

A sepal is a part of the flower of angiosperms. Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom.

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

Geraniaceae is a family of flowering plants placed in the order Geraniales. The family name is derived from the genus Geranium. The family includes both the genus Geranium and the garden plants called geraniums, which modern botany classifies as genus Pelargonium, along with other related genera.

<span class="mw-page-title-main">Thymelaeaceae</span> Family of flowering plants

The Thymelaeaceae are a cosmopolitan family of flowering plants composed of 50 genera and 898 species. It was established in 1789 by Antoine Laurent de Jussieu. The Thymelaeaceae are mostly trees and shrubs, with a few vines and herbaceous plants.

<i>Gnidia</i> Genus of flowering plants

Gnidia is a genus of flowering plants in the family Thymelaeaceae. It is distributed in tropical and southern Africa and Madagascar; more than half of all the species are endemic to South Africa. Gnidia was named for Knidos, an Ancient Greek city located in modern-day Turkey.

<i>Passerina ericoides</i> Species of flowering plant

Passerina ericoides, the Christmas berry, is a threatened species of plant in the family Thymelaeaceae, genus Passerina. It is indigenous to the coastal fynbos areas in and around the city of Cape Town, South Africa.

<i>Microloma</i> Genus of flowering plants

Microloma is a small genus of Ceropegia-like twiners and twiggy bushes occurring in mainly arid or fynbos regions in South Africa. They are generally nondescript when not in bloom, but the flowers of most species are incongruously decorative.

<i>Stilbe</i> (plant) Genus of plants

The plant genus Stilbe was described in 1767, originally as being in the Verbenaceae, but the genus now is placed in the family Stilbaceae. The entire genus is endemic to the Cape Province region of South Africa.

<i>Struthiola</i> Family of shrubs

Struthiola is a genus of plants in the family Thymelaeaceae. In habit they are ericoid shrubs or shrublets. The genus includes 31 species native to Africa, which range from Ethiopia to South Africa.

<i>Stellera</i> Genus of flowering plants

Stellera is a genus of flowering plant in the family Thymelaeaceae, with a single species Stellera chamaejasme found in mountainous regions of Central Asia, China, Siberia and South Asia. S. chamaejasme is a herbaceous perennial plant with heads of white, pink or yellow flowers, grown as an ornamental plant in rock gardens and alpine houses, but considered a weed playing a rôle in the desertification of grasslands in parts of its native range. Like many others of its family, it is a poisonous plant with medicinal and other useful properties.

<i>Diarthron</i> Genus of flowering plants

Diarthron is a genus of flowering plant in the family Thymelaeaceae. The precise limits of the genus are uncertain. When broadly circumscribed to include Dendrostellera and Stelleropsis, it consists of annual and perennial herbaceous plants and small shrubs, with reddish, white or green flowers lacking petals. It includes 16 species which range from southern European Russia and the Caucasus through Western and Central Asia through China and Mongolia to Korea and the Russian Far East.

<i>Cliffortia</i> Genus of shrubs in the rose family from southern Africa

Cliffortia, or Caperose is a genus of plants that has been assigned to the rose family, with currently 132 known species. Its species can be found in southern Africa, particularly in the Cape Floristic Region where 124 of the species can be found, 109 of which are endemic to the CFR. Most species are ericoid shrubs, some small trees up to 5 m high, others more or less herbaceous groundcover. All are wind pollinated and have separate male and female flowers in the axils of the leaves, mostly individually, sometimes grouped, which may be on the same plant or on separate plants.

<i>Struthiola striata</i> A shrub in the Thymelaeaceae family from South Africa

Struthiola striata is a rounded, heather-like shrub of up to 1.5 m (4.9 ft) high that is assigned to the Thymelaeaceae family. It has small assending leaves on long straight branches, with cream, soft yellow or pinkish flowers in spikes, each of which consist of a tube of about 1 cm (0.39 in) long with 4 oval sepal lobes and 4 yellow alternating petal-like scales. It is sometimes called ribbed capespray or featherhead in English and roemenaggie, katstertjie or veërtjie in Afrikaans. It grows on coastal flats and foothills in the Western Cape province of South Africa.

Struthiola tetralepis is a willowy shrublet of up to 30 cm (0.98 ft) high that is assigned to the family Thymelaeaceae. It has long straight branches that are initially hairy and are covered in leaves pressed against them. These leaves are small, overlapping, lance-shaped, sharply pointed, have a regular row of hairs along the margins, and 3-5 veins are visible on the outward facing surface. It has initially greenish yellow, later reddish brown flowers, each of which consists of a tube of about 1 cm (0.39 in) long with 4 lance-shaped, pointed sepal lobes and 4 yellow alternating petal-like scales. It flowers between October and February. It can be found in the southwest of the Western Cape province of South Africa. It is sometimes called cross capespray in English.

<i>Lachnaea</i> Genus of Thymelaeaceae plants

Lachnaea is a genus of flowering plants in the family Thymelaeaceae, found in the Cape Floristic Region of southern South Africa. They tend to be small ericoid shrubs.

<i>Dais</i> (plant) Genus of flowering plants

Dais is a genus of flowering plants in the family Thymelaeaceae. It is also part of the Gnidia subfamily, along with Gnidia, Drapetes, Kelleria, Pimelea, Struthiola, Lachnaea and Passerina, other genera of species). It is distributed between Tanzania to S. Africa, Madagascar. It is native to the countries of Eswatini, Lesotho, Madagascar, Malawi, Tanzania, Zimbabwe and it is also found within several Provinces of South Africa, such as Cape Provinces, Free State, KwaZulu-Natal and Northern Provinces.

References

  1. 1 2 3 4 "Passerina L." Plants of the World Online . Royal Botanic Gardens, Kew . Retrieved 16 September 2024.
  2. The Royal Horticultural Society Dictionary of Gardening, 4 vols., ed. Chittenden, Fred J., 2nd edition, by Synge, Patrick M. Volume III : Je-Pt. Pub. Oxford at the Clarendon Press 1965. Reprinted 1984. ISBN   0-19-869106-8
  3. 1 2 3 Dyer, R. Allen, The Genera of Southern African Flowering Plants”. ISBN   0 621 02854 1, 1975
  4. 1 2 3 4 Manning, John (2008). Field Guide to Fynbos. Cape Town: Struik Publishers. ISBN   9781770072657.
  5. Jaeger, Edmund Carroll (1959). A source-book of biological names and terms . Springfield, Ill: Thomas. ISBN   0-398-06179-3.
  6. Watt, John Mitchell; Breyer-Brandwijk, Maria Gerdina: The Medicinal and Poisonous Plants of Southern and Eastern Africa 2nd ed Pub. E & S Livingstone 1962