TY  - SER
AU  - Helsen,Phillippe
AU  - Browne,Robert A.
AU  - Anderson,David J.
AU  - Verdyck,Peter
AU  - Van Dongen,Stefan
TI  - Galápagos Opuntia (prickly pear) cacti: Extensive morphological diversity, low genetic variability 
U1  - 583.56 23
PY  - 2009///
PB  - Botanical Journal of The Linnean Society of London
KW  - Opuntia
KW  - Prickly pear
ER  -