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Valentine.gr  

December 2009

Did you know that that Sturt's Desert Pea - Swainsona formosa was adopted as the floral emblem of the state of South Australia?

 Sturt's Desert Pea - Swainsona formosa 

Sturt pea - Swainsona formosa

Sturt pea, Swainsona formosa, is an Australian plant in the genus Swainsona, named after English botanist Isaac Swainson, famous for its distinctive blood-red leaf-like flowers, each with a bulbous black centre, or "boss". It is one of Australia's best known wildflowers. It is native to the arid regions of central and north-western Australia, and its range extends into all mainland Australian states with the exception of Victoria.

First discovered by the English explorer William Dampier on his 1688 visit to islands off the northwestern Australian coast, the plant's presence was noted by Australian explorer Charles Sturt in 1844 in areas between Adelaide and Central Australia. The flower was named after Sturt to commemorate his exploration of inland Australia. 

The taxonomy of Sturt pea has been changed on a number of occasions. It was initially treated in the 18th century in the genus Clianthus as Clianthus dampieri, and later became more widely known as Clianthus formosus (formosus is Latin for "beautiful"). However it was later reclassified under the genus Swainsona as Swainsona formosa, the name by which it is officially known today.

Sturt pea is a member of Fabaceae, subfamily Faboideae. It has pinnate, grey-green leaves which are arranged spirally on the main axis of the plant, and in two opposite rows (distichous) on lateral stems. Its flowers are so different from its relatives that it is almost unrecognisable as a member of the pea family. The flowers are about 9 centimetres in length and grow in clusters of around half a dozen on thick vertical stalks (peduncles), which spring up every 10-15 centimetres along the prostrate stems, which may be up to 2 metres in length.

The plant flowers from spring to summer, particularly after rain. There is a natural pure white form, as well as hybridised varieties which can have flowers ranging from red to pink and even pale cream, with variously coloured central bosses. Several tricolour variants have been recorded, including some cultivars. Flowers are bird-pollinated in the wild. The fruit is a legume, about 5 centimetres long, and each yields 50 or more flat, kidney-shaped seeds at maturity

Most forms of the plant are low-growing or prostrate, however in the Pilbara region of north-western Australia varieties growing as tall as 2 metres have been observed. Generally considered to be a short-lived annual, it has been known to persist as a perennial if conditions are favourable. If the roots are left undisturbed, flowering may resume in the next season.

It is well adapted to life as a desert plant. The small seeds have a long viability, and can germinate after many years. Seeds have a hard seed coat, which protects them from harsh arid environments until the next rainfall, but inhibits germination in normal domestic environments. Growers can overcome this dormancy either by nicking the seed coat away from the 'eye' of the seed, by rubbing the seed gently between pieces of sandpaper, or by placing the seed in hot (just off-boiling) water and leaving it to soak overnight. Boiling water should not be used as it destroys beneficial bacteria on the seed coat. 

Once germinated, seedlings quickly establish a deep taproot, vital for desert survival. This means that if domestically grown, they should either be planted in their intended final location, transplanted as soon as possible after germination. They do not tolerate disturbance of their roots but, once established in well-drained soil, require little and infrequent watering, and can withstand extreme heat and sunshine, as well as light frosts.

Full sun, perfect drainage and protection from snails are essential. Supplementary watering may not be necessary once the seedlings are established. Under ideal conditions flowering commences about four months after germination. Sturt's Desert Pea is usually treated as an annual but vigorous flowering may result if root crowns survive from one season to the next.

Sturt pea is not endangered, but it is illegal to collect specimens of the plant from Crown land without a permit. The plants must not be collected from private land without the written consent of the land owner.

Sturt pea was adopted as the floral emblem of the state of South Australia on 23 November 1961. The iconic status of Sturt pea in Australia, and particularly in South Australia, has ensured its use as a popular subject in artwork and photography, as well as a decorative motif, and in a range of commercial uses. Sturt pea has also made many appearances in prose and verse, as well as featuring in some aboriginal legends (see Symon & Jusaitis (2007) for further details). Sturt pea has appeared in several releases of Australian postage stamps depicting Australian floral emblems (issued in 1968, 1971 and 2005).

Source:
http://en.wikipedia.org/wiki/Swainsona_formosa
http://goaustralia.about.com/library/bldesertpea.htm
http://www.anbg.gov.au/emblems/sa.emblem.html

 

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Dove Tree - Davidia involucrata
Ashwagandha - Winter Cherry - Withania somnifera
Zabala - Lardizabala biternata
Longan - Dimocarpus longan
Flame tree - Delonix regia
Ïrchid tree - Bauhinia variegata
Pink Lapacho - Handroanthus impetiginosus
African peach - Nauclea latifolia
Golden Himalayan raspberry - Rubus ellipticus
Flame Thrower Palm - Chambeyronia macrocarpa
Toothbrush tree - Mustard tree - Salvadora persica
Monastery bamboo - Thyrsostachys siamensis
Nara - Desert melon - Acanthosicyos horridus
Candelabra tree - Euphorbia ingens
Shea butter tree - Vitellaria paradoxa
Tejocote - Mexican hawthorn - Crataegus mexicana
Tree of Damocles - Oroxylum indicum
Talipot palm - Corypha umbraculifera
Albany pitcher plant - Cephalotus follicularis
Nipa palm - Nypa fruticans
Marmalade Box - Genipa americana
Ice Cream Bean - Inga edulis
Gular - Cluster fig - Ficus racemosa
Kei apple - Dovyalis caffra
Stork's Bill - Erodium cicutarium
Camu Camu - Myrciaria dubia
Pemphis - Pemphis acidula
Sisal - Agave sisalana
Jute Mallow - Corchorus olitorius
Sugar Apple - Annona squamosa
Sapodilla - Manilkara zapota
Black Sapote - Diospyros nigra
Star Apple - Chrysophyllum cainito
White Ginger Lily - Hedychium coronarium
Yuzu - Citrus junos
Wild Loquat - Sugar Plum - Uapaca kirkiana
Tonka - Cumaru - Dipteryx odorata
Chinese bayberry - Myrica rubra
Wood Apple - Limonia acidissima
Açaí - Euterpe oleracea
Tindola - Ivy gourd - Coccinia grandis
Blue honeysuckle - Haskap - Lonicera caerulea
Balata - Manilkara bidentata
Calabash nutmeg - Monodora myristica
Allanblackia
Kola nut - Cola nitida
Rainbow eucalyptus - Eucalyptus deglupta
Elephant apple - Dillenia indica
Australian Christmas tree - Nuytsia floribunda
Honeywort- Cerinthe major
Aconite - Monkshood - Wolfsbane - Aconitum napellus
Crown of Thorns - Euphorbia milii
Abyssinian banana - Ensete ventricosum
Goldenrain Tree - Koelreuteria paniculata
Naranjilla - Lulo - Solanum quitoense
Brazil nut tree - Bertholletia excelsa
Sea grape - Coccoloba uvifera
Bignay - Antidesma bunius
Cashew - Anacardium occidentale
Giant Himalayan Lily - Cardiocrinum giganteum
African Hemp - Sparrmannia africana
Lychee - Litchi chinensis
Prickly Heath - Gaultheria mucronata
Hoodia - Bushman's hat - Hoodia gordonii
Cannibals Tomato - Solanum viride
Ashoka - Saraca asoca
Ackee - Blighia sapida
African plum - Safou - Dacryodes edulis
Solandra - Solandra maxima
Stapelia - Stapelia gigantea
Foxglove - Digitalis purpurea
Swiss Cheese Plant - Monstera deliciosa
Chocolate flower - Berlandiera lyrata
Sandersonia - Sandersonia aurantiaca
Northern Japanese Magnolia - Magnolia kobus
Champak - Magnolia champaca
Hooker’s lips - Psychotria elata
Suicide Tree - Cerbera odollam
Konjac - Amorphophallus konjac
Madagascar ocotillo - Alluaudia procera
Water Banana - Typhonodorum lindleyanum
Salak - Salacca zalacca
Natal Plum - Carissa macrocarpa
Ashanti blood - Mussaenda erythrophylla
Duranta - Duranta erecta
Maqui - Aristotelia chilensis
Manuka - New Zealand Tea Tree - Leptospermum scoparium
Suriname cherry - Eugenia uniflora
Australian Finger Lime - Citrus australasica
Sacred Flower of the Incas - Cantua buxifolia
Job's tears - Coix Lacryma-jobi
Velvet Bean - Mucuna pruriens
Java Apple - Syzygium samarangense
Screwpine - Pandanus utilis
Marimo - Aegagropila linnaei
Achocha/Caigua - Inca cucumber - Cyclanthera pedata
Rubber Tree - Hevea brasiliensis
Sugar cane - Saccharum officinarum
Sacha inchi - Plukenetia volubilis
Coffea - Coffee Tree - Coffea arabica
Liquorice - Licorice - Glycyrrhiza glabra
Mullein -Verbascum thapsus
Iceplant - Mesembryanthemum crystallinum
Chayote - Sechium edule
Roselle - Hibiscus sabdariffa
Black Goji - Lycium ruthenicum Murray
Rose Cactus - Pereskia grandifolia
Durian - Durio zibethinus
Jackfruit tree - Artocarpus heterophyllus
Cassabanana - Sicana odorifera
Chilean myrtle - Arrayan - Luma apiculata
Kurrajong - Brachychiton populneus
Rice-paper Plant -Tetrapanax papyrifer
Shell Ginger - Alpinia zerumbet
Harlequin Glorybower - Clerodendrum trichotomum
Coco de Mer - Lodoicea maldivica
Silver Tree - Leucadendron argenteum
Buffaloberry - Shepherdia argentea
Himalayan Honeysuckle - Leycesteria formosa
Raisin Tree - Hovenia dulcis
Borojo - Alibertia patinoi - Borojoa patinoi
Butterfly Pea - Clitoria ternatea
Honey Flower - Melianthus major
Ombu - Phytolacca dioica
Lion's Ear - Wild Dagga - Leonotis leonurus
Moringa - Miracle Tree - Moringa oleifera
Sea Daffodil - Pancratium maritimum
Spear Lily - Gymea - Doryanthes
Camphor tree - Cinnamomum camphora
Waterwheel - Aldrovanda vesiculosa
Flowering rush - Butomus umbellatus
Four o'clock - Marvel of Peru - Mirabilis jalapa
Dead Man’s Fingers - Decaisnea
Bitter Melon - Momordica charantia
Shoapnuts Tree - Shoapberry - Sapindus
Acerola - Malpighia
Monkey Ladder - Sea Heart - Entada gigas
Cherimoya - Annona cherimola
Caper - Capparis spinosa
Lithops - Living Stones
Chaste Tree - Vitex agnus-castus
Chilean Lantern Tree - Crinodendron hookerianum
Parrot's Beak - Lotus berthelotii
Water Hyacinth - Eichhornia crassipes
Guaiac Tree - Guaiacum officinale - Lignum-vitae
Mickey Mouse bush - Ochna serrulata
Cow's Udder - Solanum mammosum
Miracle fruit - Synsepalum dulcificum
Akebia - Akebia quinata
Chilean Firebush - Embothrium coccineum
Caesalpinia - Caesalpinia pulcherrima
Welwitschia - Welwitschia mirabilis
Saguaro - Carnegiea gigantea
Schisandra - Schisandra chinensis
Monarda - Bee balm - Bergamot
Tamarind - Tamarindus indica
Neomarica - Walking Iris
Red hot poker - Kniphofia - Tritoma
Sikkim rhubarb - Rheum nobile
Reseda - Mignonette
Paulownia - Paulownia tomentosa
Belamcanda chinensis - Leopard lily
Blue Poppy - Meconopsis
Cannonball Tree - Couroupita guianensis
Tamarillo - Cyphomandra betacea
Goji - Wolfberry - Lycium barbarum
Vanilla - Vanilla Planifolia
Stevia - Stevia rebaudiana
Pachypodium
Physalis
Ceropegia
Sturt pea - Swainsona formosa
Clematis
Grevillea
Jade vine - Strongylodon macrobotrys
Sansevieria - Snake Plant
Trochetia
Yareta - Azorella compacta
African tulip tree - Spathodea campanulata
Angel's Trumpets - Brugmansia
Achiote - Annato - Bixa orellana
Sausage Tree - Kigelia pinnata
Castor Oil Plant - Ricinus communis
Firewheel Tree - Stenocarpus sinuatus
Bat Flower - Tacca
Snake gourd - Trichosanthes cucumerina
Sedum
Hydnora - Hydnora africana
Pickerel Weed - Pontederia
Argan - Argania spinosa
Astilbe - False Goats Beard
Feijoa - Pineapple Guava - Acca sellowiana
Aquilegia - Columbine
Cassiope
Sweet Box - Sarcococca
Christmas Cactus - Schlumbergera
Foxtail Lily - Eremurus
Rue - Ruta graveolens
Pittosporum
Ylang-Ylang - Cananga odorata
Rose of Jericho - Anastatica hierochuntica
Gunnera
Waterlily - Nymphaea
Calico Flower - Aristolochia
Daylily - Hemerocallis
Contorted hazel - Corylus avellana Contorta
Torch Ginger - Etlingera elatior
Mistletoe - Viscum album
Devil´s claw - Harpagophytum procumbens
Teasel - Dipsacus
Pampas grass - Gynerium argenteum - Cortaderia Selloanna
Purple coneflower - Echinacea purpurea
Coral Tree - Erythrina crista-galli
Portulaca
Lobelia
Field Poppy - Papaver Rhoeas
Narcissus - Daffodil
Mimosa pudica - Sensitive Plant
Boxwood - Buxus sempervirens
Firethorn - Pyracantha
Star of Bethlehem - Ornithogalum
Cosmos
Muscari - Grape Hyacinth
Papyrus - Cyperus papyrus
Zinnia
Honeysuckle - Lonicera
Passiflora - Passion Flower
Calendula - Marigold
Lupine - Lupinus
Canna - Indian Shot
Witch Hazel - Hamamelis
Oak - Quercus
Brunsvigia - Candelabra Flower
Tree peony - Paeonia suffruticosa
Olive - Olea europaea
Cornflower - Centaurea cyanus
Desert rose - Adenium obesum
Oleander - Nerium Oleander
Abutilon
Sweet Pea - Lathyrus odoratus
Chaenomeles - Flowering Quince
Forsythia
Amaryllis - Hippeastrum
Butchers broom - Ruscus aculeatus
Bay Laurel - Laurus nobilis
Gloriosa
Bamboo
Gladiolus
Artichoke - Cynara scolymus
Clivia - Clivia Miniata
Dipladenia - Dipladenia sanderii
Date palm - Phoenix dactylifera
Peach - Prunus persica
Almond - Prunus amygdalus
Willow - Salix
Pomegranate - Punica granatum
Protea cynaroides
Colchicum autumnale
Bird of Paradise - Strelitzia reginae
Cardon - Pachycereus pringlei
Wolffia arrhiza
Puya raimondii
Fuchsia
Asphodelus - Asphodel
Primula - Primerose
Dicentra spectabilis - Bleeding Heart
Edelweiss - Leontopodium alpinum
Helleborus Niger - Christmas Rose
Zantedeschia - Calla Lily
Fritillaria imperialis - Crown imperial
Aster
Heliconia
Common Sunflower - Helianthus annuus
Bee Orchid - Orphys apifera
Convalaria majalis - Lily of the Valley - Muguet
Syringa Vurgaris - Lilac
Viola
Impantiens
Snowdrop - Galanthus
Poinsettia - Euphorbia pulcherrima
Dionaea muscipula
Banksia
Sea anemone
Amorrhophallus titanum
Rafflesia arnoldi

 

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