Changing the Image Size in Painted Meadow theme

I am using the Painted Meadow theme and would like to make an image smaller. (It is a large flower that extends out and makes the reading of text more difficult. I like the flower, I just want to make it smaller. I can’t find what place on the style sheet to change the image size and what size to actually make it to have flower not appear in text. Hope I worded that correctly so that someone understands what I mean.. My site is lifewithlessmoney.com. Would appreciate any help.