Microcitrus australasicaAustralian finger lime
Photos by David Karp and Toni Siebert, CVC. Photo rights.
Source: Received as budwood from Dr. Joe Furr, USDCS, Indio, CA (from Yuma, Arizona), 1968.
View original Plant Inventory data (PDF format)
Parentage/origins: Parents unknown. Original seed collected by W.V. Mangomery, Maryborough, N.S.W., Australia. Purple fruit strain. From North Arin, Murwillunbah, N.S.W. Seed to Furr in 1965. *Probably received at UCR as one plant.
Rootstocks of accession: Cleopatra mandarin
Season of ripeness at Riverside: Year round; peak fruit production is November to December
Season of flowering at Riverside: February to April
Notes and observations:
12/22/1987, EMN: Small, squat trees which look ratty due to much dieback. No fruit.
10/21/1988, EMN: This is probably NOT "Purple fruit strain". Fruit is medium green fading to yellow at maturity. CRC 1484 has a much darker, purplish rind- see that card.
Description from The Citrus Industry Vol. 1 (1967):
" First leaves of young seedlings small, 3-5 X 2-4 mm, ovate, with very short wingless petioles borne on numerous slender, horizontal twigs with internodes often only 2-4 mm long, with sharp, slender spines, 7-12 mm long, at the nodes; the upright twigs of young plants have similar leaves and spines but the internodes are sometimes 5-8 mm long; the upright, strongly angled, vigorous twigs of mature trees, which have internodes 8-12 mm long with single sharp spines, 5-10 mm long, have lozenge-shaped leaves, 22-25 X 14-15 mm, obscurely toothed in the upper half, gradually narrowed to a blunt, truncate base with which the petiole articulates; lateral veins faintly marked above, more clearly below, 6-10 pairs, arising at an angle of 35°-45° with the midrib, lower ones longer, upper ones soon branching, all with several anastomosing curved cross-veins; leaves tapering into a truncate or emarginate tip, those on lateral twigs 8-20 X 2-10 mm, the smaller ones abruptly truncate, often irregularly emarginate; spines slender, short, 3-8 mm long; flowers arising singly in the axils of the leaves (or occasionally in pairs); flower buds subglobose or obovate, 4 X 5 mm, borne on very short pedicels, 1-2 mm long; flowers usually 5-merous but sometimes 3-4-merous; sepals free, small, concave, minutely ciliate; petals oblong, 7-8 mm long; stamens 20-25, free, pistils short, stout, ovary with 5-7 locules; ovules numerous, 8-16 (or even 20) in each locule; fruits cylindric-fusiform, 6.5-10 X 1.5-2.5 cm, often slightly curved, narrowed at both tip and base, often showing a blunt protuberance at one or both ends; peel rough with numerous oil glands, greenish-yellow at maturity; pulp-vesicles nearly free or loosely cohering, long-stalked, ovoid, ending in a very blunt or rounded tip, about 1.7-3 X 1.2-1.5 mm, borne on a slender stalk 1-2 mm long; seeds numerous, small, 6-7 mm long, ovoid, monoembryonic, usually flattened on one side and often showing small, shallow depressions on the other faces (probably caused by mutual pressure of the pulp-vesicles exerted during development of the fruit); testa smooth (not wrinkled as in Eremocitrus glauca); cotyledons hypogeous in germination.
Availability: Not commercially available in California.
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