This came in labelled "Oxanthera species". It is NOT Oxanthera, appears to be a papeda. (EM Nauer, ca mid 1980s) Fruit almost all on ground. Leaves have wide winged petiole. Fruit about the size and shape of a Bearss lime, with ridged neck. Very smooth, yellow rind. Very thin rind, green flesh, very sour; probably seedless (one fruit sampled). (EM Nauer, 12/22/1987)
Most of fruit already on ground this date. Four fruits cut and one seed found. Leaves are thick and leathery. Fruit description of 12/87 still OK. (EM Nauer, 10/19/1988)
[RCRC 4016] is a cleanup of [RCRC 3793]. Rind has a nice frangrance like tropical fruits. (JA Bash, ca early 1990s)
This is not a papeda, although it was misidentified as "unknown papeda hybrid" for some time. Since it was received as Oxanthera sp., it was keyed out (R.R. Krueger, Ottillia J. Bier) using the key on p. 255 of Swingle and Reece (1967) and generally matches the description of O. neo-caledonica on p. 257. (R.R. Krueger, ca. 2000)
Malcolm Smith of Australia's DPI observed some wild Oxanthera spp.. He stated in an email dated May 10, 2004 (on file at NCGRCD) that our specimen did not resemble the plants he observed in the wild, particularly in regard to leaf morphology. He did note that Swingle stated that Oxanthera is a highly variable genus. Ottillia 'Toots' Bier opined that the differences in leaf morphology might be due to climate and cultural care. However, these differences (which indeed are rather pronounced) must make the identification of this accession questionable. Note: The information in Swingle and Reece (1967) is unchanged from the original in Swingle (1943). (RRK, 08/2007)
Malcolm Smith had the opportunity to view the Riverside accession of Oxanthera when visiting Riverside for the 2019 joint meeting of the International Organization of Citrus Virologists and International Research Conference on Huanglongbing. Malcolm thought it looked more like Oxanthera when viewed in situ than from the photographs, but its identity as Oxanthera is still somewhat suspect. Possibly a hybrid? (R.R. KRueger, 2021-09-08)