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The Australian finger lime plant ( Citrus
Citrus
australasica, sometimes called caviar lime) is a thorny understorey shrub or small tree of lowland subtropical rainforest and rainforest in the coastal border region of Queensland
Queensland
and New South Wales, Australia. It has edible fruits which are under development as a potential new commercial crop.[2][3] According to the Swingle system it is not part of the genus citrus, but in a related genus Microcitrus.[1]

Contents

1 Description 2 Cultivation and uses

2.1 History 2.2 Rising demand 2.3 Diseases

3 Taxonomy 4 References 5 External links

Description[edit] The plant is 2–7 metres in height. Leaves are small, 1–6 cm long and 3–25 mm wide, glabrous, with a notched tip and crenate towards the apex. Flowers
Flowers
are white with petals 6–9 mm long. The fruit is cylindrical, 4–8 cm long, sometimes slightly curved, coming in different colours, including pink and green.[2] Cultivation and uses[edit] History[edit] Early settlers consumed the fruit[4] and retained the trees when clearing for agriculture. Colonial botanists suggested that they should be cultivated.[4] Rising demand[edit] The finger lime has been recently popularised as a gourmet bushfood. The globular juice vesicles have been likened to a "lime caviar",[5] which can be used as a garnish or added to various recipes. The fresh vesicles have the effect of a burst of effervescent tangy flavour as they are chewed. The fruit juice is acidic and similar to that of a lime. Marmalade
Marmalade
and pickles are also made from finger lime. The finger lime peel can be dried and used as a flavouring spice.[2] Commercial use of finger lime fruit started in the mid-1990s in boutique marmalades made from wild harvested fruit. By 2000 the finger lime was being sold in restaurants, including the export of fresh fruit.[2]

Brown skin type finger lime

The finger lime has been recently grown on a commercial basis in Australia
Australia
in response to high demand for the fruit. There is an increasing range of genetic selections which are budded onto citrus rootstock. With the sudden high market demand for the fruit the primary source of genetic material for propagation has been selections from wild stock. Diseases[edit] In cultivation, the finger lime plant is grown in much the same way as other citrus species. It may be subject to some pests and diseases requiring pest control in cropping situations. This includes scale, caterpillars, gall-wasp, and limb dieback. Research into fruit fly by Dr Andrew Jessop has concluded that finger limes are a non-host plant to fruit flies and as such are not a quarantine risk to importing countries.

Red finger lime.

Research conducted in the 1970s indicated that a wild selection of C. australasica was highly resistant to Phytophthora
Phytophthora
citrophthora root disease, which has resulted in a cross-breeding program with finger lime to develop disease-resistant citrus rootstock.[4] The CSIRO
CSIRO
has also developed several Citrus
Citrus
hybrids by crossing the finger lime with standard Citrus
Citrus
species. These hybrids have created many cultivars which generate finger limes in many different colors ranging from light pink to deep blue-green. Finger lime is thought to have the widest range of color variation within any Citrus
Citrus
species. The color of the pulp (juice vesicles) comes in shades of green or pink including pale lime-green, pale pink, coral, and scarlet. Taxonomy[edit]

Australian limes

former Eremocitrus

Citrus
Citrus
glauca

former Microcitrus

Citrus
Citrus
warburgiana

Citrus
Citrus
inodora

Citrus
Citrus
maideniana

Citrus
Citrus
garrawayi

Citrus
Citrus
australasica

Citrus
Citrus
australis

[6] References[edit]

^ a b " Citrus
Citrus
australasica F.Muell. — The Plant
Plant
List". www.theplantlist.org.  ^ a b c d Citrus
Citrus
pages, Native Australian Citrus, Citrus
Citrus
australasica ^ Mueller, Ferdinand Jacob Heinrich von. 1858. Fragmenta Phytographiæ Australiæ 1: 26. Citrus
Citrus
australasica ^ a b c Low, Tim, Wild Food Plants of Australia, ISBN 0207143838[page needed] ^ Karp, David (23 December 2009). "Finger lime: the caviar of citrus" – via LA Times.  ^ Jorma Koskinen and Sylvain Jousse. " Citrus
Citrus
Pages / Native Australian varieties". free.fr. 

External links[edit]

Media related to Citrus
Citrus
australasica at Wikimedia Commons " Citrus
Citrus
australasica". Australian Plant
Plant
Name Index (APNI), IBIS database. Centre for Plant
Plant
Biodiversity Research, Australian Government. Retrieved 9 January 2014.  " Citrus
Citrus
australasica F.Muell". Atlas of Living Australia. 

v t e

Citrus

True species

Australian and Papuan wild limes Byeonggyul Citron Clymenia Indian wild orange Ichang papeda Kumquat Mandarin Mangshanyegan Micrantha Pomelo

Major hybrids

Grapefruit Lemon Lime Orange

True and hybrid cultivars

Alemow Amanatsu Bergamot orange Bizzaria Bitter orange Blood lime Blood orange Buddha's hand Cam sành Cara cara navel Cherry orange Citrange Citrumelo Clementine Daidai Dekopon Fairchild tangerine Florentine citron Hassaku orange Hebesu Hyuganatsu Imperial lemon Iyokan Jabara Jaffa orange Kabbad Kabosu Kaffir lime Kakadu lime Kalpi Key lime Khasi papeda Kinnow Kishumikan Kiyomi Komikan Laraha Lumia Mandelo Mandora Melanesian papeda Melogold Meyer lemon Murcott Myrtle-leaved orange tree Ōgonkan Orangelo/Chironja Oroblanco Palestinian sweet lime Persian lime Pixie mandarin Ponderosa lemon Ponkan Rangpur Reikou Rhobs el Arsa Rough lemon Sanboken Satsuma mandarin Setoka Shangjuan Shonan Gold Sudachi Sweet lemon Sweet limetta Tangelo Tangerine Tangor Ugli fruit Valencia orange Variegated pink lemon Winged lime Xã Đoài orange Yuukou mandarin Yuzu

Citrons

Balady citron Corsican citron Diamante citron Fingered citron Greek citron Moroccan citron Yemenite citron

Mandarin oranges

Cleopatra mandarin Shīkwāsā Nanfengmiju

Papedas

Citrus
Citrus
halimii or Mountain "citron" Ichang papeda

Pomelos

Banpeiyu Dangyuja

Australian and Papuan citrus (Microcitrus, Eromocitrus, Clymenia and Oxanthera subgenera)

Australian outback lime Australian round lime Brown River finger lime Desert lime Mount white lime (Microcitrus) New Guinea wild lime Russell River lime Clymenia Oxanthera

Kumquat
Kumquat
hybrids (×Citrofortunella)

Calamondin Citrangequat Limequat Orangequat Procimequat Sunquat Yuzuquat

Related genus

Poncirus/Trifoliate orange

Drinks

Chūhai Curaçao Grapefruit
Grapefruit
juice Lemonade Limeade Orange juice Yuja-hwachae Yuja tea

Products

Calcium citrate Citric acid Lemonene Limonene Neroli Orange flower water Orange oil Orangeat Succade Zest

Diseases

Black spot CTV/Tristeza Exocortis Greening Mal secco Phytophthora

citricola

Related topics

The Citrus
Citrus
Industry Citrus
Citrus
production Citrus
Citrus
rootstock Citrus
Citrus
taxonomy Cold-hardy citrus Hesperidium Japanese citrus List of citrus fruits Mother Orange Tree Orangery University of California Citrus
Citrus
Experiment Station University of California, Riverside Citrus
Citrus
Variety Collection

Book Category Production Commons

Taxon identifiers

Wd: Q141953 EoL: 483557 EPPO: CIDAC GBIF: 3190063 GRIN: 24247 IPNI: 774367-1 ITIS: 506393 PLANTS: MIAU4 Tropic

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