Marumi (CRC 3237)
Photos by David Karp and Toni Siebert, CVC. Photo rights.
Source: Received as seed from John Carpenter, USDCS, Indio, CA, 1957.
Parentage/origins: Parents unknown.
Rootstocks of accession: Cleopatra mandarin
Season of ripeness at Riverside: Year round
Season of flowering at Riverside: May to August
Notes and observations:
John Carpenter received seeds from USDA, Orlando, Florida.
EMN, 1/20/1989: First light crop on trees planted in spring 1988. Looks OK on Cleo & Nagami/Carrizo sandwich so far. Fruit is much like Meiwa but about half the size, and a lighter crop.
Description from The Citrus Industry Vol. 1 (1967):
The first fairly complete description of this species, under the name Citrus japonica, was published in 1784 by Thunberg in his Flora japonica; it reads in translation, as follows: "petiole winged, leaves acute, shrubby stem. Japanese: Kin Kan, vulgo Fime tats banna, Kaempf., Am. ex., Fase. V. p. 801. Growing here and there, often cultivated for its little fruits. Stem shrubby, compressed-subangulate, erect, glabrous, scarcely a foot high. Branches and branchlets alternate, compressed-angular, spinose, glabrous, erect, green. Spines solitary, in the axils of the leaves, erect divergent. Leaves few, with winged petioles, ovate, somewhat acute, entire, somewhat concave, glabrous, dark green above, paler below, erect, spreading, 1 in. [2.5 cm] long, with very minute glands ('poris'). Petioles winged. 1 line [2 mm] long. Flowers axillary, often solitary, rarely paired, pediculate, nodding. Pedicels glabrous, hanging down, 1 line [2 mm] long. Parianth, 1-phyllous, green, glabrous, minute, 5-toothed. Petals 5, white, oblong, somewhat concave, spreading, somewhat claw-like. Filaments 19, subulate, compressed, erect, in 5 more or less coherent bundles, connate, forming a cylinder, shorter than the corolla, nearly equal in length, white. Anthers oblong, small, yellow. Ovary superior, subglobose, glabrous. Style solitary, cylindrical, slightly shorter than the stamens, greenish white. Stigma simple, globose, yellow, striate, many-locular within. Fruit with fleshy peel, vesicular pulp, 9-locular [sic], the size of a cherry. Differs from the other species of Citrus especially in being a very small shrub with minute fruits; thus it can scarcely be considered as a variety of orange. It resembles Citrus medica in the axillary flowers, but differs in the winged petioles; it differs from the orange in the axillary flowers, which are solitary or paired, never in panicles. Fruit ripens in December and January, is very sweet, agreeable and edible."
Availability: Not commercially available through the Citrus Clonal Protection Program.
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