Grevillea

Grevillea juniperina

The Grevilleen or silver oak ( Grevillea ) is a genus within the family of the silver tree family ( Proteaceae ).

Description

Grevillea species grow as an evergreen, mostly erect or creeping shrubs, some species than trees, with plant height depending on the type 0.5 to 35 meters. The leaves are sessile or pedunculated depending on the type. The leaf blades are simple, while smooth or serrated, or shared with up to three division levels. The leaf margin is bent back to flat. There is pinnate and network or Parallelnervatur.

The hermaphrodite flowers are also stalked or sessile depending on the type. They are usually paired with a common carrier sheet, arranged in plural inflorescences. The perianth is usually zygomorphic with recurved ends, sometimes regularly with raised ends. There are usually four, rarely three bracts present, the separate on flowering, so as to release the stylus end. The bloom are smooth or hairy on both sides. The anthers sit bloom cladding directly. The nectar glands are completely or ring-shaped, rarely missing or cruciform. The ovary is glabrous or hairy. The sessile or pedunculated Upper constant ovary contains two ovules. The disc-or cone- shaped scar is upright or tilted constantly to the side of the pen.

The bald or hairy fruits are usually follicles or rarely ( in about Grevillea candicans ) a achenes and contain only one or two seeds. Depending on the type, they remain long on the plant or drop out early. The pericarp is often hard shells. The mostly flat ellipsoid, rarely hemispherical seeds are winged or wingless.

Dissemination

The Grevillea species are native to Australia, New Guinea, New Caledonia and the Indonesian island of Sulawesi. Almost all species are native to Australia. Only five species occur in areas outside Australia: Grevillea exul, Greviileea gillvayi and Grevillea meisneri are native to New Caledonia. Grevillea Grevillea papuana elbertii and are native to Sulawesi and New Guinea. Two other species, Grevillea Grevillea glauca and baileyana, occur in New Guinea and in Queensland, Australia.

System

The first description of 1809 in Joseph Knight: On the cultivation of the plants BELONGING to the natural order of Proteeae, p 120 uses the spelling " Grevillia ". Type species is Grevillea R.Br. aspleniifolia ex Knight. The homonym Grevillea LCBeck & Emmons was published in 1826 in the American Journal of Science, and Arts, Volume 11, panel 1. The genus name honors Charles Francis Greville Grevillea (1749-1809), a member of the Royal Society and the Linnean Society of London.

The genus includes about 360 species Grevillea. Here is a relatively arbitrary list of species of the genus Grevillea:

Grevillea acacioides
Grevillea acanthifolia A.Cunn.
Grevillea acerata
Grevillea acerosa F.Muell.
Grevillea acrobotrya
Grevillea acropogon
Grevillea Acuaria
Grevillea adenotricha
Grevillea agrifolia
Grevillea albiflora
Grevillea alpina Lindl. ( Syn: . Grevillea dallachiana F.Muell nom nud. . )
Grevillea alpivaga
Grevillea althoferorum
Grevillea amplexans
Grevillea anethifolia
Grevillea aneura
Grevillea angulata
Grevillea angustiloba
Grevillea annulifera F.Muell.
Grevillea aquifolium Lindl.
Grevillea arenaria R.Br.
Grevillea argyrophylla
Grevillea armigera
Grevillea asparagoides
Grevillea aspera R.Br.
Aspleniifolia Grevillea Knight
Grevillea asteriscosa
Grevillea aurea
Grevillea australis R.Br.
Grevillea baileyana McGill. ( Syn: Grevillea pinnatifida ( FMBailey ) FMBailey; Kermadecia pinnatifida FMBailey )
Red flowering silver oak ( Grevillea banksii R.Br. )
Grevillea banyabba
Grevillea barklyana F.Muell. ex Benth.
Grevillea batrachioides
Grevillea baueri
Grevillea baxteri
Grevillea beadleana
Grevillea bear diana
Grevillea bedggoodiana
Grevillea benthamiana
Grevillea berryana
Grevillea biformis
Grevillea R.Br. bipinnatifida
Grevillea brachystachya
Grevillea brachystylis Meisn.
Grevillea bracteosa Meisn.
Grevillea brevifolia
Grevillea brevis
Grevillea bronwenae
Grevillea buxifolia (Sm. ) R.Br. ( Syn: Embothrium buxifolium Sm )
Grevillea byrnesii
Grevillea cagiana
Grevillea calcicola
Grevillea R.Br. caleyi
Grevillea calliantha
Grevillea candelabroides C.A.Gardner
Grevillea candicans C.A.Gardner
Grevillea Candolleana
Grevillea capitellata
Grevillea celata
Grevillea centristigma
Grevillea ceratocarpa
Grevillea cheilocarpa
Grevillea christineae
Grevillea chrysophaea
Grevillea cirsiifolia
Grevillea coccinea
Grevillea commutata
Grevillea concinna
Grevillea confertifolia F.Muell.
Grevillea coriacea
Grevillea corrugata
Grevillea costata
Grevillea crassifolia
Grevillea cravenii
Grevillea R.Br. crithmifolia
Grevillea crowleyae
Grevillea cunninghamii
Grevillea curviloba McGill.
Grevillea cyrano stigma
Grevillea decipiens
Grevillea decora
Grevillea decurrens
Grevillea deflexa
Grevillea delta
Grevillea R.Br. depauperata
Grevillea didymobotrya
Grevillea dielsiana C.A.Gardner
Grevillea diffusa
Grevillea dilatata
Grevillea dimidiata F.Muell.
Grevillea diminuta
Grevillea disjuncta
Grevillea dissecta
Grevillea divaricata
Grevillea diversifolia
Grevillea Dolichopoda
Grevillea donaldiana
Grevillea drummondii ( W.Fitzg. ) McGill.
Grevillea dryandri
Grevillea dryandroides
Grevillea dryophylla
Grevillea dunlopii
Grevillea elongata
Grevillea endlicheriana Meisn.
Grevillea epicroca
Grevillea erectiloba
Grevillea erinacea
Grevillea eriobotrya
Grevillea eriostachya Lindl. Grevillea eriostachya subsp. eriostachya
Grevillea eriostachya subsp. excelsior ( Diels ) McGill. ( Syn; Grevillea excelsior Diels )

Grevillea raybrownii
Grevillea refracta
Grevillea renwickiana
Grevillea repens F.Muell. ex Meisn.
Grevillea reptans
Grevillea rhizomatosa
Grevillea rhyolitica
Grevillea rigida
Grevillea ripicola
Grevillea rivularis L.A.S.Johnson & McGill
Grevillea robusta A.Cunn. ex R.Br.

Grevillea rogersoniana
Grevillea rosieri
Rosemary silver oak ( Grevillea rosmarinifolia A.Cunn. )
Grevillea roycei
Grevillea rubicunda
Grevillea rudis
Grevillea saccata Benth.
Grevillea sarissa
Grevillea scabra
Grevillea scabrida
Grevillea scapigera
Grevillea scortechinii
Grevillea secunda
Grevillea sericea (Sm. ) R.Br.
Grevillea sessilis
Grevillea shiressii Blakely
Grevillea shuttleworthiana
Grevillea singuliflora
Grevillea sparsiflora
Grevillea speciosa ( Knight) McGill. Grevillea speciosa subsp. dimorpha ( F.Muell. ) McGill. (Syn. Grevillea dimorpha F.Muell. )
Grevillea speciosa subsp. oleoides ( Sieber ex Schult. & Schult. f ) McGill. ( Syn: .. Grevillea oleoides Sieber ex Schult Schult & f )
Grevillea speciosa subsp. speciosa (syn.: Grevillea R.Br. punicea )

Hybrids:

Grevillea × gaudichaudii

The following described species in this genus are currently assigned to other genera:

Grevillea densiflora CTWhite: now Finschia chloroxantha Is Diels

Use

The flowers of Grevilleen were with the Aborigines popular because of their sweet nectar. He was shaken for immediate consumption on the hand or placed in a vessel called Coolamon with a little water to get a sweet drink.

Many species are grown as ornamental plants of Grevilleen for their showy foliage and flowers; it arose in culture many hybrids.

Swell

RO Makinson: entry at ABRS Flora of Australia Online. (English)

Ovary (botany) Grevillea juncifolia Coolamon (vessel)

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