Please see the reference below, which suggests that psoralen type compounds
on the skin combined with sunlight can induce such burns.
"They're always havin' a good time down on the bayou..."
("Ramblin' Man" by Dickey Betts from the album BROTHERS AND SISTERS by the
Allman Bros. Band, 1973)
Dr. Charles A. Miller III
Associate Professor of Environmental Health Sciences
374 Johnston Building, SL29
Tulane Univ. School of Public Health and Tropical Medicine
1430 Tulane Avenue
New Orleans, LA 70112
(504)585-6942, rellim at tulane.edu
Bionet.toxicology news group http://www.bio.net/hypermail/toxicol/current
Burns. 1995 Nov;21(7):542-3.
Burns induced by plants.
Lagey K, Duinslaeger L, Vanderkelen A.
Burn Center Brussels, Neder-Over-Heembeek, Belgium.
Plants of the family Umbelliferae are known to cause a phytophotodermatitis
due to a phototoxic reaction caused by furocoumarin (psoralens) and
simultaneous exposure to sunlight. We report four patients with partial skin
thickness burns, induced by this phototoxic reaction. One occurred after
contact with parsley (Apium petroselinum) and three others after contact
with giant hogweed (Heracleum mantegazzianum) and simultaneous exposure to
PMID: 8540985 [PubMed - indexed for MEDLINE]