| 0 | PI 539670 | 'Citrus excelsa' | Citrus sp. | Sabah, Malaysia | RIV | | | 1972 | DONATED | PRE 1972 | | | | | | Dick Hamilton received 4 fruits from a cooperator in Udet Sandakin, Sabak, North Borneo [sic, see comment below]. He believes that the fruit could have been a form of rough lemon. The fruits, however, had smooth, thin tightly adherant skin, large prominent oil glands, and bitter, acrid, inedible flesh. Polyembryonic. (original CES documentation ca 1972...WP Bitters?) This accession had seedling yellows which was removed by shoot tip grafting (STG 172-1). (EM Nauer, 1986) Fruit compared with fruit of RCRC 2316 = PI 109632, Citrus excelsa, and these two accessions appear to be identical in both fruit & foliage characteristics. May as well discard this one. (EM Nauer, 11/13/1987) Appears to be identical to C. excelsa. (EM Nauer, 10/1988) There are currently three accessions identified as "Citrus excelsa" (PI 109632, PI 539194, and the current accession. All three were originally received as something other than C. excelsa. C. excelsa is described in Wester (1915). The provenance of this particular accession is a little unclear since the political makeup of the area of origin has changed over the years. Best conjecture is that this is from the northeast coast of the Island of Borneo, corresponding to what is currently referred to as Sandakan, Sabah, Malaysia. It is also unclear as to when Dr. Hamilton received the fruit. Were the fruit received in Hawaii in 1972 and seeds immediately sent to Riverside, or were the seeds sent to Riverside extracted from fruit from trees grown from seeds taken from fruit sent some time previously? All personnel from that time have passed into the big repository in the sky so any additional information will not be available in this world. (RR Krueger, 09/18/2018) Additional information and nice photographs from the UC Riverside Citrus Variety Collection. | 1434606 | PI 539670 |
| 1 | PI 539194 | Citrus excelsa | Citrus ×aurantiifolia (Christm.) Swingle | Philippines | RIV | | | 1947 | COLLECTED | PRE 1947 | | | | | | Dr Gardner reports in their preliminary rootstock trials that this variety looked very promising. Seeds germinated very well, vrey vigorous and uniform. (archival material on file at NCGRCD/CVC; origin unknown) This is not Kalpi. Could be C. excelsa or C. davaoensis. (JA Brusca, 10/1964) This accession had exocortis which was removed by shoot tip grafting (STG 205-2). (EM Nauer, 1986) This accession appears to be identical to Citrus excelsa, [RCRC 2316 = PI 109632]. May as well discard? (EM Nauer, 01/14/1988) Appears to be identical to Citrus excelsa, [RCRC 2316 = PI 109632]. (EM Nauer, 10/1988) The association of this genotype with C. excelsa is not well documented, the only comment available being that of Mr. Brusca. There are currently three accessions identified as "Citrus excelsa" (PI 100632, PI 539670, and the current accession. All three were originally received as something other than C. excelsa. C. excelsa is described in Wester (1915). (RR Krueger, 09/18/2018) Additional information and nice photographs from the UC Riverside Citrus Variety Collection. | 1434130 | PI 539194 |
| 2 | PI 109632 | 'Excelsa' | Citrus ×aurantiifolia (Christm.) Swingle | Maryland, United States | RIV | | | 1914 | COLLECTED | 05/22/1914 | | | | | Cultivar | Cutting from CPB Sept 1930 & pltd lathhouse, balled out 3/32. Planted Apr '32. Ref Philippine Agric Review Vol VIII, No 1, 1915, pg 26. This is not the same fruit we list as Limon Real in Fd 18A-34-2 [=PI 109624]. (JA Brusca, 1964-10) This is listed as a member of the Papeda group because it was so listed in the old [UC Citrus Experiment Station] accession book. However, The Citrus Industry, Vol I, pp 364, puts it under aurantifolia in a table of comparison of major classification systems. What is it? (EM Nauer, 1986) The Citrus Industry doesn't give a description of C. excelsa so here 'tis: A medium size fruit - medium yellow, basically smooth but variably bumpy. Round with flattened base and blunt nose surrounded by a depressed ring. Rind thin; seedy, flesh ricey, white to yellow, very sour. Used as an indicator plant for tatterleaf-citrange stunt. (EM Nauer, 1988-01-14) The redundant accession number PI 539192 was assigned to this genotype in error in 1990. The observations were made when it was labelled as PI 539192. This accession was received by PIO as C. aurantiifolia "mandarin lime" and was so identified in the CPB records. However, all known CES records indentify it as C. excelsa and link it to the description in Wester, 1915. The reason or source for this is not known. There are two other apparently redundant accessions of C. excelsa: PI 539194 and PI 539670. This genotype needs rationalization. (RR Krueger, 2018-09-09) Additional information and1434130 nice photographs from the UC Riverside Citrus Variety Collection. | 1801068 | PI 109632 |
| 3 | PI 109624 | 'Limon Real No. 18' | Citrus sp. | Central Visayas (Region VII), Philippines | RIV | | Not Available | 1914 | COLLECTED | 02/21/1914 | | | | | Cultivar | This is different from what we call C excelsa [PI 109632]. (JA Brusca, 10/1964) This accession had psorosis, removed by shoot tip grafting (STG 179-2). (EM Nauer, 1985) Fruit is much like a smooth, round lemon; lemon-like in flavor, seedy. Some fruits have a persistant style. (EM Nauer, 11/12/1987) This accession was erroneously and redundantly assigned PI 539192 in 1990. This is now corrected to the correct PI 109624. Observatoins were made when this was numbered as PI 539192. Wester (1915) equates 'Limon real' with C excelsa, so thsere is some confusion between this PI 109624 and PI 109632. As per the record for PI 109632, it is unclear how that accession came to be identified as C excelsa and as to which may be the correct version of C excelsa/'Limon real'. Note that PI 109624 was originally received as seed, and PI 109624 as budwood. PI 109632 has more broadly winged petioles than PI 109624, as per Wester's description. (RR Krueger, 09/18/2018) Additional information and nice photographs from the UC Riverside Citrus Variety Collection. | 1801060 | PI 109624 |