Persoonia
Persoonia pinifolia, inflorescence.
The Persoonia are a genus within the family of the silver tree family ( Proteaceae ). The 95 to 100 species occur only in Australia, but there in most states.
- 5.1 Notes and references
Description and ecology
Appearance and leaves
Persoonia species grow as evergreen shrubs and small trees that reach heights of growth between 0.1 and 25 meters. The usually alternate and spirally or rarely opposite, sometimes with three leaves arranged in a whorl on the branches of deciduous leaves are sessile to short -stalked. The simple leaf blades are leathery or fleshy. The leaf margins are smooth. There are no stipules present.
Inflorescences and flowers
The flowers are borne singly or up to 70 on the scale-like leaves or leaf -like leaves in lateral or terminal racemose inflorescences. The hermaphroditic, flowers are four-fold radial symmetry to zygomorph. It's just a circle with four free, usually yellow to green, rare red, deformed only at their base bloom cladding available. It's just a circle with four each other free stamens present, either all fertile or is a Staminodium. Unlike the related genera staminodes are not fused with the scars. The stamens are fused with the bloom cladding, only sometimes the uppermost region free. The anthers are straight or curved back and only sometimes flattened. At the base of the carpels one or two pairs of nectar glands are present, both are the same or one of them is reduced. The gynoecium is shorter or longer than the stamens. It is only included a maximum shortly pedunculated, upper permanent carpel in each flower. Each carpel contains only one or two ovules. The stylus is bent back straight, curved to clear. Pollination is by insects ( entomophily ).
Fruit and seeds
The bare stone fruits contain mostly one, rarely two seeds. The seeds contain endosperm and the embryo just has usually two, but also a special feature sometimes up to nine ( cotyledons ). The spread of the hard seed through many different animals such as emus and kangaroo species.
Sets of chromosomes
The basic chromosome number is n = 7
Occurrence
The 95 to 100 species occur only in Australia, but there in most states. Few Persoonia species colonize the edge of the arid zone. There are only 16 species in areas with annual rainfall of less than 25 mm. 15 Of these, 16 are found in southwestern Australia and only two species, Persoonia pertinax and Persoonia Leucopogon have quite arid areas of distribution on. The greatest biodiversity has Persoonia on in the subtropics areas, in areas that are topographically and edaphic diverse. In particular Persoonia species occur on the sandy plains of southwestern Australia, in the coastal plains and the Great Dividing Range of south-eastern Australia. Some species reach the alpine zone in Tasmania and the Australian Alps, but few reach an altitude of 1500 meters.
System
The genus Persoonia 1798 was set up by James Edward Smith in Transactions of the Linnean Society of London, Volume 4, page 215. Type species is Persoonia lanceolata Andrews. There are also homonyms Persoonia Willd., It is a synonym of Carapa Aubl. ( Meliaceae ), and Persoonia Michx. , It is a synonym of Trattenikia pers. (Asteraceae). The genus name honors the Persoonia Dutch mycologist Christiaan Hendrik Persoon and botanist. Synonyms for Persoonia Sm are: linkia Cav, Pycnonia LAS. Johnson & B.G.Briggs, pentadactylon C.F.Gaertn ..
The genus belongs to the tribe Persoonia Persoonieae Rchb. , The only tribe of the subfamily Persoonideae LASJohnson & BGBriggs within the family Proteaceae.
The genus Persoonia include 95 to 100 species:
- Rufiflora group: it contains three types: Persoonia inconspicua
- Persoonia brevirhachis
- Persoonia rufiflora
- Persoonia laurina
- Persoonia confertiflora
- Persoonia sylvatica
- Persoonia longifolia
- Persoonia elliptica R.Br.
- Persoonia arborea F.Muell.
- Persoonia subvelutina
- Persoonia gunnii
- Persoonia muelleri
- Persoonia moscalii
- Lanceolata group: it contains about 50 species: Persoonia juniperina
- Persoonia chamaepeuce
- Persoonia virgata
- Persoonia tenuifolia
- Persoonia acerosa
- Persoonia myrtilloides
- Persoonia brevifolia ( Benth. ) LASJohnson & PHWeston
- Persoonia acuminata
- Persoonia recedens
- Persoonia oxycoccoides
- Persoonia asperula
- Persoonia microphylla
- Persoonia terminalis
- Persoonia bargoensis
- Persoonia nutans
- Persoonia laxa
- Persoonia oblongata
- Persoonia marginata
- Persoonia daphnoides
- Persoonia procumbens
- Persoonia oleoides
- Persoonia rufa
- Persoonia cornifolia
- Persoonia katerae
- Persoonia adenantha
- Persoonia stradbrokensis
- Persoonia prostrata
- Persoonia conjuncta
- Persoonia media
- Persoonia iogyna
- Persoonia tropica
- Persoonia amaliae
- Persoonia volcanica
- Persoonia hirsuta
- Persoonia chamaepitys
- Persoonia sericea
- Persoonia fastigiata
- Persoonia subtilis
- Persoonia Curvifolia
- Persoonia cuspidifera
- Persoonia rigida
- Persoonia mollis
- Persoonia lanceolata
- Persoonia glaucescens
- Persoonia levis
- Persoonia linearis Andrews
- Persoonia pinifolia
- Persoonia isophylla
- Persoonia coriacea
- Persoonia helix
- Persoonia pertinax
- Persoonia cymbifolia
- Persoonia Leucopogon
- Persoonia pungens
- Persoonia baeckeoides
- Dillwynioides group: it contains three types: Persoonia cordifolia
- Persoonia dillwynioides
- Persoonia flexifolia
- Persoonia graminea
- Persoonia micra thera
- Persoonia chapmaniana
- Persoonia pentasticha
- Persoonia trinervis
- Persoonia angustiflora
- Persoonia papillosa
- Persoonia bowgada
- Persoonia hexagonal
- Persoonia spathulata
- Persoonia scabra
- Persoonia quinquenervis
- Persoonia striata
- Persoonia sulcata
- Persoonia acicularis
- Persoonia rudis
- Persoonia filiformis
- Persoonia falcata
- Persoonia biglandulosa P.H.Weston
- Persoonia brachystylis
- Persoonia kararae
- Persoonia stricta
- Persoonia saundersiana
- Persoonia teretifolia
- Persoonia comata
- Persoonia saccata
- Persoonia hakeiformis
Pictures
Persoonia lanceolata
Fruits and flowers of Persoonia linearis.
Bark of Persoonia levis.
Leaves of Persoonia levis.
Swell
- HR Coleman, 2008: entry in the Western Australian flora. ( Description section )
- Peter H. Weston: entry in the Flora of Australia. ( Description section )
- Peter H. Weston & Nigel P. Barker: A new supra- generic classification of the Proteaceae, with an annotated checklist of genera, Telopea, Volume 11, Issue 3, 2006, pp. 314-344: Full-Text PDF. ( Section systematics)