RT Journal Article SR Electronic T1 Propagation of North American Trilliums JF Native Plants Journal JO NATIVE PLANTS JOURNAL FD University of Wisconsin Press SP 14 OP 17 DO 10.3368/npj.3.1.14 VO 3 IS 1 A1 William Cullina YR 2002 UL http://npj.uwpress.org/content/3/1/14.abstract AB