Australian round lime
Photos by David Karp and Toni Siebert, 12/4/2008, CVC. Photo rights.
Source: Received as budwood from Dr. Joe Furr, USDCS, Indio, CA (from Yuma, Arizona), 1968.
Parentage/origins: Parents unknown.
Rootstocks of accession: Own roots.
Season of ripeness at Riverside: July to October
Season of flowering at Riverside: February
Notes and observations:
RKS, 1976: Seeds collected at Boat Harbor, Murwillunbah, N.S.W., Australia by W.V. Mungomery, Dept. of Primary Industry, Mayborough. Sent to Dr. J.R. Furr 1965. Yellow fruit strain. Looks like M. australis.
Description from The Citrus Industry Vol. 1 (1967):
Leading terminal twigs straight, very angular, with internodes 1-1.5 cm long, with single slender acute thorns 5-10 mm long; lateral twigs short, slightly angled, with internodes 5-10 mm long, and spines 2-6 mm long; leaves entire, glabrous, or sparingly ciliate on the margin near the base; leaves articulated with the petioles; larger leaves on leading twigs 3-4 X 2-3 cm, obovate to obcordate (sometimes lozenge-shaped on less vigorous leading twigs); leaves of lateral twigs diamond-shaped, 2-3 X 1.2-1.8 cm; veins visible on both surfaces, but more conspicuous below, 12-15 pair arising at an angle of 25°-30° with the midrib and frequently branching, with veinlets arising at a very acute angle and running parallel to the veins; leaves rounded, emarginate or bluntly pointed at tip, cuneate at the base; petioles articulated with the leaf blades, finely pubescent and flattened an the upper side, 2-3 mm long; flowers arising singly in the axils of the leaves, small, 10-15 mm diam., 4- or 5-merous, with 16-20 stamens with free filaments; fruit globose or subglobose, 2.5-3.5 or 5 cm diam., with 6 segments (Schaler's green to grass green; Ridgway, 1912, pl. 6); pulp-vesicles proper (exclusive of stalk) 6-10 X 2.5-3.5 mm, lightly coherent in mature fruits, very pale greenish (water-green, Ridgway, pl. 41) near the peel but much brighter green (light grass-green to grass-green, Ridgway, pl. 3) in the center, irregularly slender-pyramidal or fusiform, more or less angular from pressure, tapering gradually into long, more or less contorted blunt tips, 1-1.5 mm wide, containing numerous large droplets of strong-flavored oil, stalks often very short, sometimes 2-3 mm long, texture of pulp-vesicles firm enough to cut into slices with a sharp knife (much firmer than in any species of Citrus); seeds flattened, containing a single embryo; no clearly defined chalazal cap in spite of the acid nature of the pulp (in Citrus the species with acid pulp have strongly colored chalazal caps).
Availability: Not commercially available through the Citrus Clonal Protection Program.
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