Microcitrus australis × M. australasica
Photos by Dr. Bill Bitters, CVC. Photo rights.
Source: Received as budwood from W.T. Swingle, USDA, 1924.
Parentage/origins: Reported to be a hybrid of Microcitrus australis × M. australasica.
Rootstocks of accession: Carrizo citrange
Season of ripeness at Riverside: April to October
Season of flowering at Riverside: February to March
Notes and observations:
Microcitrus virgata was used as a provisional name, validated by publication. This is currently "Sydney hybrid". (Microcitrus australis x Microcitrus australasica).
EMN, 12/22/1987: Not a very attractive tree- very small leaves and very thorny. No fruit now.
Description from The Citrus Industry Vol. 1 (1967):
Twigs very slender and very numerous, usually only lightly angled, very minutely and rather sparsely puberulous; bud scales brownish, inconspicuously ciliate; nodes 5-13 mm long, with a single slender, sharp, axillary spine, 4-12 mm long; leaves on vigorous leading twigs 20-30 X 8-13 mm, glabrous, narrowly elliptical or lozenge-shaped, with undulate or irregular, shallowly crenate-dentate margins, narrowed at the apex, sometimes with an emarginate tip, cuneate at the base, with numerous lateral veins arising at a small angle (25°-35°) with the midrib, with some cross and some subparallel veinlets, narrowed into very short petioles, 2-3 mm long which are sparingly and finely pubescent above; leaves on lateral twigs 10-20 X 3-8 mm, linear-elliptic or narrowly lozenge-shaped, the smaller leaves entire, the larger with undulate or irregular, shallowly dentate margins, petioles 1.2-2 mm long; fruits elongate-obovoid or ellipsoid, 35-50 X 20-28 mm, with the tip abruptly rounded, numerous slightly protuberant oil glands, circular in outline and about 0.5 mm diam., peel 2 mm thick, yellowish-green when ripe (near lime green, Ridgway, pl. 31); inner portion 0.4-0.5 mm thick, smooth, of firmer texture than the outer, segments 5-8 central core solid, very narrow, ovule traces numerous; pulp-vesicles ovoid, tapering to an acute point above, broadly rounded at base, 4.5-7 X 2-4 mm, borne on slender stalks, 2-7 mm long, attached to inner wall of the ovary but not to segment walls, not adhering to one another, containing an acid juice; seeds none. The ripe fruits have a spicy, not disagreeable odor. The flower buds are spinel red, and the new growth is very dark dull dusky purple (Ridgway, 1912).
Availability: Not commercially available in California.
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