Eryngium species, flowers
3.111584
35mm color slide
Digitized
Photographic image
July 2004
Eryngium species (sea holly, blue sea holly, sea star thistle, star thistle, blue eryngo) has small thistle-like blue flower heads. Each flower head is composed of tiny flowers arranged in a sphere and is surrounded by gray-blue or green-blue bracts that resemble petals.
Olbrich Botanical Garden, Madison, Wisconsin