Microcitrus australasicaAustralian finger lime
Photos by David Karp and Toni Siebert, CVC. Photo rights.
Source: Received as budwood from a tree in the CVC that had no CRC number, see notes below.
Parentage/origins: Parents unknown.
Rootstocks of accession: Schaub rough lemon
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:
This tree in 12D had no CRC No. or source on the field map. So it may not be the original CRC 3670 which was listed as "died". CRC 3670 was re-assigned to it 7/87 to keep it in the same CRC No. area as other Microcitrus received at the same time. It appears to be different from adjacent trees so could be the original CRC 3670--EMN.
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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